LY THUYETL THUYT TNH TON SN PHNG BTCT THEO TIU CHUN ACI 318-20021 : Mt s lu khi s dng tiu chun ACI 318-2002 khi thit k sn phng BTCT :* Cc cng thc s dng trong tiu chun ACI 318-2002 l theo h n v Pound - inch do phi qui i cc n v theo h SI v h n v ny* f'c : L cng chu nn ( mc b tng ) ca mu hnh tr 15cm(6inch)x30cm(12inch) do nu ly s liu mc b tng xc nh theo mu lpphng 15cmx15cmx15cm th phi qui i v mu hnh tr = cch ly gi tr mc chia cho h s 1.2V d :Theo TCVNTheo ACI 348-2002300250mcmcf'c(kg/cm2)f'c(kg/cm2)* Rs : Cng chu ko ca ct thp ly theo gi tr thm chy theo th nghim ko thp do nu s dng ct thp Vit Nam th phi ly gi trtiu chun ca ct thp ch khng phi ly ga tr tnh ton ca ct thpV d :Thp AI :Rs=240MpaThp AII :Rs=295MpaThp AIII :Rs=390Mpa* Ni lc dng thit k ct thp cho sn phng BTCT c xc nh theo phng php khung tng ng* Phng php khung tng ng ch s dng xc nh ni lc ca kt cu chu ti trng ng khng s dng phng php ny xc nhni lc ca kt cu chu ti trng ngang.2 : Cc dng sn phng BTCT theo ACI 318-2002 :Theo ACI 318-2002 sn phng 2 phng BTCT c phn ra thnh cc dng sau :* Sn phng khng dm BTCT c hoc khng c m ct* Sn phng khng dm BTCT c hoc khng c m ct ng thi c cc dm bin ni cc ct bin* Sn phng BTCT c cc dm lin kt cc ct bin v cc ct gia.3 : La chn chiu dy sn phng lm vic 2 phng theo ACI 318-2002 :a : Kch thc ti thiu ca sn phng 2 phng ca bn sn khng dm hoc ch c cc dm binB dy bn sn trong trng hp ny c xc nh theo bng sau :Ct thp bn snKhng c m ctC m ct hoc bn u ctPsikg/cm2 bn binCc bn bn trong bn binCc bn bn trongKhng c dm binC dm binKhng c dm binC dm bin( Bng s 1 )400002758.6206896552Ln/33Ln/36Ln/36Ln/36Ln/40Ln/40600004137.9310344828Ln/30Ln/33Ln/33Ln/33Ln/36Ln/36750005172.4137931034Ln/28Ln/31Ln/31Ln/31Ln/34Ln/34b : Kch thc ti thiu ca sn phng 2 phng c cc dm ni lin cc ct vi nhau :Vi cc bn sn c cc dm lin kt cc u ct li vi nhau th do cc dm c cng chng un ln hn cng chng un ca bnnn b dy bn sn s nh hn b dy bn khng c cc dm . Trong trng hp ny b dy ti thiu ca bn s ph thuc nhiu vot s cng ca dm v cng ca bnKhi bn v dm cng s dng mt loi mc b tng th t s cng dm v cng bn c xc nh :a =Ib/IsTrong :Is = b.hs^3/12 :m men qun tnh ca tit din bn khi cha b ntIb :m men qun tnh ca tit din dm khi cha b ntKhi bn v dm khng s dng cng chung mc b tng th t s cng dm v cng bn c xc nh :a =Ib*Eb/(Is*Es)Trong :Eb :Mduyn n hi ca b tng dmEs :Mduyn n hi ca b tng bnb1 : Xc nh tit din tham gia vo tnh Ib v Is ca dm bin v bn bin :a : Mt ct ngang ca dm bin :A = Ab + As*Trong :A :Din tch mt ct ngang ca dm bin dng xc nh IbAb :Din tch mt ct ngang thc t ca dm bin ( Ab = bxh )As* :Din tch mt ct ngang ca phn sn thm vo trong tnh ton IbXc nh As* nh sau :B rng ca As* = min(4*hs , h - hs )( hs : b dy gi nh sn , h : chiu cao thc t dm ang xt )( Ghi ch : Cng thc trn dng khi mt trn sn = mt trn dm . Trong trng hp mt trn sn thp hn mt trn dm thxc nh theo hng dn trang 629 ca ACI hoc theo hnh di y )Trnh t xc nh m men qun tnh ca tit din dm bin .* Xc nh trng tm tit din ( Theo sc bn vt liu )* Xc nh m men qun tnh ton tin din i vi h trc trng tm theo cng thc ri trc ( Sc bn vt liu )Cng thc ri trc :JX = sum(Jxi) + sum(ai^2*Fi)b : Mt ct ngang ca bn sn bin trong tnh ton Ib :Cng thc xc nh Is ca bn sn :Is = (0.5*Ln+0.5*b)*hs^3/12b2 : Xc nh tit din tham gia vo tnh Ib v Is ca dm gia v bn gia :a : Mt ct ngang ca dm gia :A = Ab + 2*As*Trong :A :Din tch mt ct ngang ca dm gia dng xc nh IbAb :Din tch mt ct ngang thc t ca dm gia ( Ab = bxh )As* :Din tch mt ct ngang ca phn sn thm vo trong tnh ton IbXc nh As* nh sau :B rng ca As* = min(4*hs , h - hs )( hs : b dy gi nh sn , h : chiu cao thc t dm ang xt )Chiu cao ca As* = hsTrnh t xc nh m men qun tnh ca tit din dm gia .* Xc nh trng tm tit din ( Theo sc bn vt liu )* Xc nh m men qun tnh ton tin din i vi h trc trng tm theo cng thc ri trc ( Sc bn vt liu )Cng thc ri trc :JX = sum(Jxi) + sum(ai^2*Fi)b : Mt ct ngang ca bn sn gia trong tnh ton Ib :Cng thc xc nh Is ca bn sn :Is = (0.5*Ln1+0.5*Ln2)*hs^3/12b3 : Cch xc nh h s :aca 1 bnMi bn s c 1 gi tratb = (a1+a2+a3+a4)/4Trong :a1 :H s t l cng dm trn cng bn ca 1 cnh bn ( c xc nh theo qui tc ni trn )a2 :H s t l cng dm trn cng bn ca 1 cnh bn ( c xc nh theo qui tc ni trn )a3 :H s t l cng dm trn cng bn ca 1 cnh bn ( c xc nh theo qui tc ni trn )a4 :H s t l cng dm trn cng bn ca 1 cnh bn ( c xc nh theo qui tc ni trn )b4 : Xc nh b dy ti thiu ca bn :Sau khi xc nh c :atbca 1 bn ta tin hnh xc nh chiu dy ti thiu ca 1 bn theo cc trng hp sau :Trng hp 1 :Khi h satb = (Nt-Fb)/(0.8*n1*n2*Rs)Trong :As :Din tch tit din 1 thanh ct thp aiNt :Lc nn thng bnFb :Kh nng chng nn thng ca b tngFb = a*Rbt*Um*hon1 :S nhnh ai ( nu l ai kn th n1 = 2 )n2 :S thanh ai c trong phm vi kch thc y thp c din tch (2ho+bc)*(2ho+hc)Rs :Cng tnh ton chu ko ca ct thp ly nh sau : Rs = min(Rct,175Mpa)Trng hp 2 : Cu to m ct cho ct :Kch thc m ct trong sn phng c quyt nh bi iu kin chng chc thng bn sn khi khng b tr ct thp chu ct* Chiu cao m ct c xc nh qua iu kin chng chc thng :* Theo kinh nghim c th tham kho theo s liu m ct cho ti trng q=1000 -:- 1500 kg/m2 di yTrng hp 3 : Cu to bn u ct cho ct :Bn u ct c thit k = cch lm dy bn sn trong phm vi u ct sn phng kh nng chng chc thng m khng cn b tr ctai chu ctKch thc bn u ct c xc nh thng qua u kin chng chc thng m khng cn b tr ct thp chu ctC th tham kho kch thc bn u ct di yb : Theo Tiu chun ACI 318-2002 :( Cc cng thc s dng h n v Pound - inch )Trng hp chiu dy bn sn kh nng chu ct thng ( chc thng ) :Nu b dy bn sn tho mn iu kin :Vu =< F*VcTh khng phi b tr ct ai chng chc thng bnTrong :Vu :Lc m thng tnh tonF = 0.85H s gim bn chng chc thng ca bnVc :Kh nng chng chc thng ca bnXc nh gi tr Vu :Xc nh gi tr Vc :Gi tr Vc c ly = gi tr nh nht xc nh theo cc cng thc di y .Cng thc 1 :Vc1 = 4*bo*d*sqrt(f'c)Cng thc 2 :Vc2 = ( 2 + 4/bc )*bo*d*sqrt(f'c)Cng thc 3 :Vc3 = ( a*d/bo + 2 )*bo*d*sqrt(f'c)Ga tr :Vc = min(Vc1,Vc2,Vc3)Trong :Vc : b danh ngha theo lc ct ca b tngf'c : bn khi nn ca b tng = mc b tngd : chiu cao tnh ton ca snbo : chu vi tit din ti hn ca thp m thnga :H s ph thuc v tr cta =40i vi ct trong ( tit din ti hn c trn 4 cnh )a =30i vi ct bin ( tit din ti hn c trn 3 cnh )a =20i vi ct gc ( tit din ti hn c trn 2 cnh )* Xc nh h sbc( H s ph thuc tit din ct )Trng hp chiu dy bn sn khng kh nng chu ct thng ( chc thng ) :Khi xy ra :Vu > F*VcTh phi :* Hoc tnh ton ct thp chu ct chng chc thng* Hoc lm m ct cho cc u ct* Hoc lm bn u ct ( bn u ct l phn bn sn c lm dy thm tng ho cho iu kin chng chc thng bn khi bnkhng c ct thp chu ct )Trng hp 1 : B tr ct thp chu ct chng chc thng :a : Thit k ct thp chu ct dng vai b :Trong bn sn b tr ct thp chu ct dng vai b th gi tr gii hn bn danh ngha theo lc ct ti tit din ti hn cch mp ct mt on = 0.5*d( d l chiu cao tnh ton ca bn sn ) khng c ln hn :Vn = Vs + Vc =< 6*bo*d*sqrt(f'c)Trong :Vc :Kh nng chu ct thng ca b tng snVs :Kh nng chu ct ca ct thp vai b* Xc nh Vc :Gi tr Vc c ly = gi tr nh nht xc nh theo cc cng thc di y .Cng thc 1 :Vc1 = 4*bo*d*sqrt(f'c)Cng thc 2 :Vc2 = ( 2 + 4/bc )*bo*d*sqrt(f'c)Cng thc 3 :Vc3 = ( a*d/bo + 2 )*bo*d*sqrt(f'c)Ga tr :Vc = min(Vc1,Vc2,Vc3)* Xc nh Vs :Kh nng chu ct ca ct thp c xc nh theo cng thc sau :Vs = Vu - F*Vc = F*Av*fy*sin(a)V Vs phi lun nh hn gi tr di y ( trong trng hp ln hn th ly bng ) :Vs < = 3*d*bo*sqrt(f'c)Trong :d,bo : Xc nh nh trna :Gc to bi phng ngang vi phng cho ca ct vai bDin tch ti thiu ct thp chu ct c xc nh theo cng thc sau :Av = ( Vu - F*Vc )/(F*fy*sin(a))Ghi ch :gi tr Av : l tng din tch ct thp chu ct ca 1 pha cnh ctb : Thit k ct thp chu ct dng ct ai ( dm tch hp ) :Kh nng chu ct ca b tng :Vc = F*2*d*bo*sqrt(f'c)Trong : bo xc nh ti v tr mt ti hn nh bng trn* Xc nh kh nng chu ct ca ct ai Vs :Kh nng chu ct ca ct ai c xc nh theo cng thc :s*Vs = s*(Vu - F*Vc) = F*Av*fy*d(*)Trong :F = 0.85H s gim kh nng chu ct thng ca b tng bnAv :Tng din tch tit din ct ai chu ct nm trong ng bao mt ti hnV d :Vi ct c 4 mt chc thng:Av =n1* n*A*4( n = s nhnh ai 1 mt ct , A : din tch ca 1 thanh ai n , 4 : S mt ct )Vi ct c 3 mt chc thng :Av = n1*n*A*3( n = s nhnh ai 1 mt ct , A : din tch ca 1 thanh ai n , 3 : S mt ct )Vi ct c 2 mt chc thng :Av = n1*n*A*2( n = s nhnh ai 1 mt ct , A : din tch ca 1 thanh ai n , 2 : S mt ct )( vi ai kn th n = 2 )( n1 : S thanh ai n tham gia vo chu ct 1 pha cnh ct )fy :Kh nng chu ko ca ct thp ais :Bc ct ai chu ct 1 pha cnh ctBc ct ai chu ct c qui nh nh sau :* ai u tin cch mp ct 1 on = d/4* Cc ai tip theo cch ai u 1 on = 0.5*dVy bc ai xc nh theo cng thc (*) Jec = Jb : cng un ca ct tng ng :Thc nghim thy rng khi chu ti trng ng phn bn sn nm trong phm vi kch thc ct ( theo hng vung gc khung ang xt ) hoc cc dmlin kt u ct theo hng vung gc khung ang xt s lm gim cng un thc t ca ct . k n s gim ngi ta a vo khi nimct tng ng cng un ca ct tng ng xc nh theo cng thc :E : M duyn n hi ca b tng ct tng ng1/Kec = Sum(1/Kci ) + 1/KtKec = 4*E*Iec/Lc :Iec : M men qun tnh ca tit din ct tng ngTrong :Lc :Chiu di ctKec : cng un ca ct tng ng ti nt lin kt ( nt khung )Kci : cng un ca ct thc t ( Phn ct trn v phn ct di bn sn ang xt ) ti nt khung ( nt lin kt )Kt : cng xon ca phn t sn hoc dm trong phm vi ct ang tnh Kec theo phng vung gc khung ang xt ti nt lin kt ( nt khung )* Xc nh cng xon ca phn t :* Xc nh cng un ca ct theo tit din thc t ca ct :Cng thc xc nh cng un :Kci = k*E*Ic/LcTrong :Kci : cng un ca ct th i ang xt ti nt lin kt ( nt khung )EM duyn n hi ca b tng ctIc :M men qun tnh ca tit din ly i vi trc vung gc mt phng khungIc =b*h^3/12Lc :Chiu cao ctk :H s cng - c tra bng A-23 ( hoc bng di y )Bng xc nh h s cng un k ca ct theo cc s trnta/tbH s kLc/Lu1.051.11.151.21.251.31.351.41.450k4.24.44.64.855.25.45.65.80.2k4.314.624.954.35.656.026.46.797.20.4k4.384.795.225.676.156.657.187.748.320.6k4.444.915.425.966.547.157.818.59.230.8k4.495.015.586.196.857.568.319.129.981k4.525.095.716.387.117.898.739.6310.61.2k4.555.165.826.547.328.179.0810.0711.121.4k4.585.215.916.687.518.419.3810.4311.571.6k4.65.265.996.797.668.619.6410.7511.951.8k4.625.36.066.897.88.799.8711.0312.292k4.635.346.126.987.928.9410.0611.2712.592.2k4.655.376.177.058.029.0810.2411.4912.852.4k4.665.46.227.128.119.210.3911.6813.082.6k4.675.426.267.188.29.3110.5311.8613.292.8k4.685.446.297.238.279.4110.6612.0113.483k4.695.466.337.288.349.510.7712.1513.653.5k4.715.56.47.398.489.6911.0112.4614.024k4.725.546.457.478.69.8411.2112.714.324.5k4.735.566.57.548.699.9711.3712.8914.575k4.755.596.547.68.7810.0711.513.0714.776k4.765.636.67.698.910.2411.7213.3315.17k4.785.666.657.76910.3711.8813.5415.348k4.785.686.697.829.0710.4712.0113.715.549k4.85.716.747.899.1810.6112.1913.9315.838 : M hnh ho khung tng ng cho trng trnh my tnh xc nh ni lc9 : Phn phi m men tng ti cc tit din ca khung tng ng xc nh trn cho cc di bn trn ct v di gia nhp thuc phm vi ca khung va tnha : Phn phi m men tng ti cc tit din ca khung tng ng cho cc tit din v tr tng ng ca di ct v di gia nhp thuc khung ca kt cu sn khng dm + hoc c dm :Do khung tng ng bao gm ton b di trn ct v 1 phn di gia nhp ( di gia nhp c th l 1 na di nu l khung bin hoc 2 na di nu l khung gia )nn m men ti cc tit din ca khung tng ng l m men tng ti cc tit din thuc v tr tng ng ca di ct v phn gii gia nhp gn lin vi khungS phn chia m men tng ti mt v tr tit din no cho tit din tng ng ca di ct v di gia c thc hin theo qui tc sau :Mot = Modc + ModgTrong :Mot :Mo men ti mt tit din bt k c xc nh = phng php khung tng ngModc :M men ti tit din tng ng ca di trn ct cu thnh khung tng ng Modg :M men ti tit din tng ng ca di gia nhp cu thnh khung tng ng Do di trn ct c lin kt vo ct nn m men Mot c phn phi phn ln l cho di trn ct phn tha cn li l phn phi cho di gia nhpDo nu nh ta phn phi c Mot cho di trn ct th cng phn phi c Mot cho di gia nhp .S phn phi m men Mot cho di trn ct v di gia nhp c cc c im sau :Gi tr m men ti cc tit din ti hn ( tit din gii nhp , gia nhp ) ca di trn ct v di gia nhp ph thuc vo cng ca bn , cng ca dm ( ni cc ct )khung tng ng vi bn sn v cng chng xon ca phn bn sn hoc dm lin kt vi ct theo hng vung gc khung ang xtKh nng lin kt khng xon ca dm c phn nh thng qua cng thc :bt = ( Eb*C ) /(2*Es*Is)( bt = 0 :Cho sn phng khng dm )Trong :Eb :Mduyn n hi ca b tng dmEs :Mduyn n hi ca b tng snC :H s khng xon ca dm lin kt theo phng vung gc khung ang xt n chnh l h s C trong xc nh Kt ca ctIs :M men qun tnh ca bn sn :Is = b*h^3/12b :B rng khung tng ng ang xth :Chiu cao sn thuc khung tng ng ang xtT s cng ca dm ni lin cc ct ca khung tng ng ang xt vi bn sn xc nh theo cng thc :a = ( Eb*Ib ) / ( Es*Is )Trong :Ib :M men qun tnh ca tit din dm ( ni cc ct khung ) v 1 phn bn sn( tit din ny xc nh theo ng qui tc trnh by trn )Sau khi c Mot , bt , ata c bng phn phi m men sau :Bng phn phi m men cho cho di ct v di gia nhp ( theo t l % ) :Loi sn phng :V trM men tng caDi trn ct L2/L1Di gia nhp L2/L1iu kinkhung t , Mot0.5120.512Sn phng khng dmM.men m nhp trongMot75%75%75%25%25%25%a1*L2/L1 = 0Sn phng c dmM.men m nhp trongMot90%75%45%10%25%55%a1*L2/L1 >=1Sn phng khng dm khng hoc c dm binM.men m nhp binbt = 0Mot100%100%100%0%0%0%a1*L2/L1 = 0bt >=2.5Mot75%75%75%25%25%25%Sn phng c dm c hoc khng c dm binM.men m nhp binbt = 0Mot100%100%100%0%0%0%a1*L2/L1 >=1bt >=2.5Mot90%75%45%10%25%55%Sn phng khng dmM men dngMot60%60%60%40%40%40%a1*L2/L1 = 0Sn phng c dmM men dngMot90%75%45%10%25%55%a1*L2/L1 >=1

BIACNG HO X HI CH NGHA VIT NAMc lp - t do - hnh phcL THUYT TNH TON SN PHNG BTCTTIU CHUN : ACI 318-2002

SAN PHANG CO DAM (2)SN PHNG BTCT - TCACI318-2002 - ( SN C DM )Cn phi s dng thm phm mm SAFE la chn kt qu cui cngCNG TRNH :Gi tr kt qa thp di y + vi kt qu thp do SAFE a ra s cho ra kt qu cui cngHNG MC :1 : S LIU THIT K :Tn khung tng ng :KHUNG TRC 1V tr khung :KTGGhi ch:KTB :Khung trc binKTG :Khung trc giaBng s liu nhp khung tng ng :TrcTrcTrcTrcTrcTrcTrcTrcTrcTrc1-:-22-:-33-:-44-:-55-:-66-:-77-:-88-:-99-:-1010-:-11L1 (m)L2 (m)L3 (m)L4 (m)L5 (m)L6 (m)L7 (m)L8 (m)L9 (m)L10 (m)2888798835L1- inchL2-inchL3-inchL4-inchL5-inchL6-inchL7-inchL8-inchL9-inchL10 inch78.7401574803314.9606299213314.9606299213314.9606299213275.5905511811354.3307086614314.9606299213314.9606299213118.1102362205196.8503937008Bng s liu b rng v chiu cao khung tng ngNhp bn tri :KHUNG TRC 1Ltr =8m=314.9606299213inchNhp bn phi :KHUNG TRC 1Lph =7m=275.5905511811inchChiu cao tng di sn cn tnh :Lcd =3.6m=141.7322834646inchChiu cao tng trn sn cn tnh :Lctr =3.6m=141.7322834646inchB rng bn tri :KHUNG TRC 1Btr =4m=157.4803149606inchB rng bn phi:KHUNG TRC 1Bph =3.5m=137.7952755906inchB rng khung tng ng :B =7.5m=295.2755905512inchBng s liu tit din ct cc trc khung ang xt :Qui c khung tng ng nm trong mt phng ngang : Phng khung // vi trc OX :Tit din ct bn di mc sn (b// phng khung,h = vung gc khung)Tit din ct bn trn mc sn (b// phng khung , h= vung gc khung )Ct trc 1b//OX=40cm=15.7480314961inchCt trc 1b//OX=40cm=15.7480314961inchh//OY=40cm=15.7480314961inchh//OY=40cm=15.7480314961inchCt trc 2b//OX=50cm=19.6850393701inchCt trc 2b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 3b//OX=60cm=23.6220472441inchCt trc 3b//OX=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchCt trc 4b//OX=50cm=19.6850393701inchCt trc 4b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 5b//OX=60cm=23.6220472441inchCt trc 5b//OX=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchCt trc 6b//OX=50cm=19.6850393701inchCt trc 6b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 7b//OX=50cm=19.6850393701inchCt trc 7b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 8b//OX=50cm=19.6850393701inchCt trc 8b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 9b//OX=60cm=23.6220472441inchCt trc 9b//OX=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchCt trc 10b//OX=50cm=19.6850393701inchCt trc 10b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 11b//OX=40cm=15.7480314961inchCt trc 11b//OX=40cm=15.7480314961inchh//OY=40cm=15.7480314961inchh//OY=40cm=15.7480314961inch2 : LA CHN CHIU DY BN SN :Hsn =20cm bn giaKch thc bnCnh ngn L1 =8m=314.9606299213inchhs (gi thit ) =20cm =7.874015748inchCnh di L2 =8m=314.9606299213inchCnh s 1 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb1 (cm4)Thng s bna1rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333800533333.3333333330.97Cnh s 2 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb2 (cm4)Thng s bna2rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.3333333336004000001.2933333333Cnh s 3 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb3 (cm4)Thng s bna3rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333700466666.6666666671.1085714286Cnh s 4 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb4 (cm4)Thng s bna4rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333650433333.3333333331.1938461538a1a2a3a4amLoi thpKch thc bnbLmax(inch)hs tnh tonKt lunMcfy (Psi)L1(inch)L2(inch)inchcm0.971.29333333331.10857142861.19384615381.1414377289AII42775314.9606299213314.96062992131314.96062992137.844577807819.9252276319hs gi thit t bn binKch thc bnCnh ngn L1 =6m=236.2204724409inchhs (gi thit ) =20cm =7.874015748inchCnh di L2 =6m=236.2204724409inchCnh s 1 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb1 (cm4)Thng s bna1rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Bien8040202003200426666.6666666671040013333.33333333331.1111111111475555.555555556400266666.6666666671.7833333333Cnh s 2 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb2 (cm4)Thng s bna2rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.3333333336004000001.2933333333Cnh s 3 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb3 (cm4)Thng s bna3rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333700466666.6666666671.1085714286Cnh s 4 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb4 (cm4)Thng s bna4rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333650433333.3333333331.1938461538a1a2a3a4amLoi thpKch thc bnbLmax(inch)hs tnh tonKt lunMcfy (Psi)L1(inch)L2(inch)inchcm1.78333333331.29333333331.10857142861.19384615381.3447710623AII42775236.2204724409236.22047244091236.22047244095.740074346214.5797888393hs gi thit t bn gcKch thc bnCnh ngn L1 =7m=275.5905511811inchhs (gi thit ) =20cm =7.874015748inchCnh di L2 =7m=275.5905511811inchCnh s 1 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb1 (cm4)Thng s bna1rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Bien8040202003200426666.6666666671040013333.33333333331.1111111111475555.555555556350233333.3333333332.0380952381Cnh s 2 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb2 (cm4)Thng s bna2rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Bien8040202003200426666.6666666671040013333.33333333331.1111111111475555.555555556350233333.3333333332.0380952381Cnh s 3 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb3 (cm4)Thng s bna3rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333700466666.6666666671.1085714286Cnh s 4 ca bn ang xt ( H trc c s t ti trong tm tit din dm )V trKch thc dmhs (gt ) - cmhw (cm)Thng s dmThng s bnYg (cm)Jb4 (cm4)Thng s bna4rng (cm)Cao (cm)y1 (cm)F1(cm2)J1(cm4)y2 (cm)F2(cm2)J2(cm4)B.rng (cm)Js(cm4)Trong8040202003200426666.6666666671040013333.33333333332517333.333333333650433333.3333333331.1938461538a1a2a3a4amLoi thpKch thc bnbLmax(inch)hs tnh tonKt lunMcfy (Psi)L1(inch)L2(inch)inchcm2.03809523812.03809523811.10857142861.19384615381.5946520147AII42775275.5905511811275.59055118111275.59055118116.502051964516.5152119897hs gi thit t3 : TI TRNG TC DNG LN BN SN :a : Tnh ti tc dng ln sn :Tn lp vt liu sngH sB dy (m)QQBng chuyn i n vkg/m3kg/m2Psi1kPa = 100kg/m^2 = 0.01kg/cm^2Gch lt sn 40x40cm22001.10.01536.30.05264684551inch = 25.4mm = 2.54cm = 0.0254mVa lt sn18001.10.03569.30.10050761421Psi = Pound/inch^2Bn BTCT sn25001.10.25500.79767947791Psi = 6.895kPa = 689.5kg/m^2Va trt trn18001.10.01529.70.04307469181kg/m^2 = 1Psi/689.5685.30.9939086294b : Hot ti sn tc dng ln sn :Tn dng hot tiGi tr ton phnGi tr di hnGi tr tm thikg/m2Psikg/m2Psikg/m2PsiHot ti sn phng LV2600.3770848441650.0942712111950.2828136331Ghi ch : H s vt ti nhn vo vi hot ti tiu chunc : Tnh ti tng xy trn sn :Tn loi tng xy trn sngH sB dy (m)Chiu cao (m)Chiu di (m)P (kg)KT bnQQkg/m3L1(m)L2(m)kg/m2PsiTng xy 22018001.10.253.681425687254.57142857140.369211644Tng xy 11018001.10.153.65.55880.687105.01071428570.1522998032359.58214285710.5215114472Bng tng hp ti trng b mt tc dng ln sn :H n v SIH n v Pound -inchDealoadLiveloadSumDealoadLiveloadSumkg/m2kg/m2kg/m2PsiPsiPsi1109.88214285711951304.88214285712.25356780280.48078317622.7343509794 : TNH TON CNG KHUNG TNG NG :Cng thc xc nh cng un ti nt khung ca dm : K=k*E*J/L ( k : Tra bng A-20 to A-22 off ACI318-2002) . L : nhp dm , J : m men qun tnh ca ton tit din ly i vi trc trung tm4a : Xc nh cng sn khung tng ng :Kb = k*(E*J)/L = k*(E*Jt)/L => Jt = J (Trong : J : M men qun tnh ton tit din dm+bn)Tn khung t.ngLtri (cm)Lphi (cm)Kch thc dmSn khung T.ngPhn dm cn liL - t tm dm n mp tri sn (cm)Qui c chn h trc c s xoy l ti trng tm tit din bn snb - cmh - cmhs (cm)Bs (cm)b - cmh - cmKHUNG TRC 13504008040207508020350Tit din bn sn :Tit din dmTo trng tmTit din bn snTit din dmJx - Ton tit din (cm4)x1 - cmy1 - cmF1 (cm2)x2 - cmy2 - cmF2(cm2)X (cm)Y (cm)F1 (cm2)Jx1(cm4)a1 (cm)F2 (cm2)Jx2 (cm4)a2 (cm)0015000-25-201600-2.4096385542-1.9277108434150005000001.9277108434160053333.333333333318.07228915661131646.58634538Xc nh tit din dm tng ng cho khung tng ng :Jx =1131646.58634538cm4bt =30cmht =76cm4b : Xc nh cng un ca ct khung tng ng :a : Xc nh h s xon ca cc dm , bn lin kt vo vi khungTn trcLoi khungV tr trcDm v.gc khunghs - inchbc-inchhw-inchTit din 1Tit din 2C - inch^4b - cmh - cmb - inchh - inchx1-inchy1-inchx2 - inchy2 - inchCt trc 1KTGBin804031.496062992115.74803149617.87401574815.74803149617.87401574815.748031496131.49606299217.8740157487.87401574828561.0342440227Ct trc 2KTGGia804031.496062992115.74803149617.87401574819.68503937017.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 3KTGGia804031.496062992115.74803149617.87401574823.62204724417.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 4KTGGia804031.496062992115.74803149617.87401574819.68503937017.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 5KTGGia804031.496062992115.74803149617.87401574823.62204724417.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 6KTGGia804031.496062992115.74803149617.87401574819.68503937017.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 7KTGGia804031.496062992115.74803149617.87401574819.68503937017.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 8KTGGia804031.496062992115.74803149617.87401574819.68503937017.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 9KTGGia804031.496062992115.74803149617.87401574823.62204724417.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 10KTGGia804031.496062992115.74803149617.87401574819.68503937017.87401574815.748031496131.49606299217.8740157487.87401574829035.1294737351Ct trc 11KTGBin804031.496062992115.74803149617.87401574815.74803149617.87401574815.748031496131.49606299217.8740157487.87401574828561.0342440227b : Xc nh cng xon ph thm cho ct :Tn trcLoi khungV tr trcLtr khung (inch)Lph khung (inch)ci - inchCiKti/ECt trc 1KTGBin137.7952755906157.480314960615.748031496128561.03424402274923.7774266711Ct trc 2KTGGia137.7952755906157.480314960619.685039370129035.12947373515488.3688758779Ct trc 3KTGGia137.7952755906157.480314960623.622047244129035.12947373516035.8063520542Ct trc 4KTGGia137.7952755906157.480314960619.685039370129035.12947373515488.3688758779Ct trc 5KTGGia137.7952755906157.480314960623.622047244129035.12947373516035.8063520542Ct trc 6KTGGia137.7952755906157.480314960619.685039370129035.12947373515488.3688758779Ct trc 7KTGGia137.7952755906157.480314960619.685039370129035.12947373515488.3688758779Ct trc 8KTGGia137.7952755906157.480314960619.685039370129035.12947373515488.3688758779Ct trc 9KTGGia137.7952755906157.480314960623.622047244129035.12947373516035.8063520542Ct trc 10KTGGia137.7952755906157.480314960619.685039370129035.12947373515488.3688758779Ct trc 11KTGBin137.7952755906157.480314960615.748031496128561.03424402274923.7774266711c : Xc nh cng un ca tit din ct khung :Xc nh h s cng khung :B dy bn u ct hoc m ct :15.7480314961inchVi bn sn c bn u ct v m ct th xem li LuTn trcLoi khunghs - inchta/tbCt di mc sn:Cn bn triCn bn phikiTit din ct diKci/ELc-inchLu-inchLc/LuLc/LukitriLc/Lukiphibc - inchhc - inchJ-inch^4Ct trc 1KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4115.748031496115.74803149615125.3538347282231.7998220132Ct trc 2KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 3KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4123.622047244123.622047244125947.10378831141173.4865989417Ct trc 4KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 5KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4123.622047244123.622047244125947.10378831141173.4865989417Ct trc 6KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 7KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 8KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 9KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4123.622047244123.622047244125947.10378831141173.4865989417Ct trc 10KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 11KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4115.748031496115.74803149615125.3538347282231.7998220132Xc nh h s cng khung :B dy bn u ct hoc m ct :15.7480314961inchVi bn sn c bn u ct v m ct th xem li LuTn trcLoi khunghs - inchta/tbCt trn mc sn:Cn bn triCn bn phikiTit din ct trnKci/ELc-inchLu-inchLc/LuLc/LukitriLc/Lukiphibc - inchhc - inchJ-inch^4Ct trc 1KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4115.748031496115.74803149615125.3538347282231.7998220132Ct trc 2KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 3KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4123.622047244123.622047244125947.10378831141173.4865989417Ct trc 4KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 5KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4123.622047244123.622047244125947.10378831141173.4865989417Ct trc 6KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 7KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 8KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 9KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4123.622047244123.622047244125947.10378831141173.4865989417Ct trc 10KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4119.685039370119.685039370112513.0708855668565.9175342119Ct trc 11KTG7.8740157481141.7322834646118.11023622051.21.155.711.257.116.4115.748031496115.74803149615125.3538347282231.7998220132d : Xc nh cng tng ng ca ct khungTn trcLoi khungV tr trcKti/Esum(Kci/E)Keci/ECng thc xc nh Iti =Lci*(Keci/E)/(n*4)Tit din chnGhi ch : Kec : c xc nh trn l Kec tng cng ca ct trn v ct di ti nt lin kt. Nu ct trn v ct di c Lct = Lcd v tit din nh nhau th cng un ca 1 phn ct tng ng ti nt lin kt c xc nh theo cng thc: Kec = KeLci(inch)It - inch^4bc=hc(inch)bc (cm)hc(cm)bc (cm)hc (cm)Ct trc 1KTGBin4923.7774266711463.5996440264423.7055309689141.73228346464684.302060904315.39772413539.11021930339.1102193033939Ct trc 2KTGGia5488.36887587791131.8350684237938.3288512601141.732283464610373.751226971318.783618920647.710392058447.71039205844747Ct trc 3KTGGia6035.80635205422346.97319788341689.8781187668141.732283464618682.549496850921.759772320955.269821695155.26982169515555Ct trc 4KTGGia5488.36887587791131.8350684237938.3288512601141.732283464610373.751226971318.783618920647.710392058447.71039205844747Ct trc 5KTGGia6035.80635205422346.97319788341689.8781187668141.732283464618682.549496850921.759772320955.269821695155.26982169515555Ct trc 6KTGGia5488.36887587791131.8350684237938.3288512601141.732283464610373.751226971318.783618920647.710392058447.71039205844747Ct trc 7KTGGia5488.36887587791131.8350684237938.3288512601141.732283464610373.751226971318.783618920647.710392058447.71039205844747Ct trc 8KTGGia5488.36887587791131.8350684237938.3288512601141.732283464610373.751226971318.783618920647.710392058447.71039205844747Ct trc 9KTGGia6035.80635205422346.97319788341689.8781187668141.732283464618682.549496850921.759772320955.269821695155.26982169515555Ct trc 10KTGGia5488.36887587791131.8350684237938.3288512601141.732283464610373.751226971318.783618920647.710392058447.71039205844747Ct trc 11KTGBin4923.7774266711463.5996440264423.7055309689141.73228346464684.302060904315.39772413539.11021930339.1102193033939Nhn xt :T cng thc :1/Kec = 1/sum(Kci) + 1/Kt = (Kt+sum(Kci))/(Kt*sum(Kci)) => Kec = Kt*sum(Kci)/(Kt+sum(Kci)) = sum(Kci)/(1+sum(Kci)/Kt)Vi mt tit din ct c th sum(Kci) = consnt , Khi nu Kt gim th Kec gim v Kt tng th Kec tng v Kec < sum(Kci)Hnh khung tng ng :5 : PHN PHI M MEN CHO CC TIT DIN THUC DI TRN CT V DI GIA NHPBng phn phi m men cho cho di ct v di gia nhp ( theo t l % ) :Loi sn phng :V trM men tng caDi trn ct L2/L1Di gia nhp L2/L1iu kinkhung t , Mot0.5120.512Sn phng khng dmM.men m nhp trongMot75%75%75%25%25%25%a1*L2/L1 = 0Sn phng c dmM.men m nhp trongMot90%75%45%10%25%55%a1*L2/L1 >=1Sn phng khng dm khng hoc c dm binM.men m nhp binbt = 0Mot100%100%100%0%0%0%a1*L2/L1 = 0bt >=2.5Mot75%75%75%25%25%25%Sn phng c dm c hoc khng c dm binM.men m nhp binbt = 0Mot100%100%100%0%0%0%a1*L2/L1 >=1bt >=2.5Mot90%75%45%10%25%55%Sn phng khng dmM men dngMot60%60%60%40%40%40%a1*L2/L1 = 0Sn phng c dmM men dngMot90%75%45%10%25%55%a1*L2/L1 >=1Xc nh t s cng dm trn cng bn ( a )Dm ni ctV trhs - cmKch thc dmhw (cm)Thng s dmThng s bnTrng tmH trc c s t ti trng tm tit din dmb - cmh - cmx1 - cmy1 - cmF1 - cm2x2 -cmy2 -cmF2 - cm2X - cmY - cmNhp 1-2KTG20804020003200501040002Nhp 2-3KTG20804020003200501040002Nhp 3-4KTG20804020003200501040002Nhp 4-5KTG20804020003200501040002Nhp 5-6KTG20804020003200501040002Nhp 6-7KTG20804020003200501040002Nhp 7-8KTG20804020003200501040002Nhp 8-9KTG20804020003200501040002Nhp 9-10KTG20804020003200501040002Nhp10-11KTG20804020003200501040002Dm ni ctV trhs - cmKch thc dmhw (cm)Xc nh m men qun tnh ca tit din dm ( Jb )Xc nh Jx ca ton tit din dm bn theo cng thc ca sc bn vt liu ( cng thc di trc song song )b - cmh - cmF1(cm2)J1(cm4)a1(cm)F2(cm2)J2(cm4)a2(cm)Jb(cm4)Nhp 1-2KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 2-3KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 3-4KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 4-5KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 5-6KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 6-7KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 7-8KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 8-9KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp 9-10KTG208040203200426666.666666667-240013333.33333333338517333.333333333Nhp10-11KTG208040203200426666.666666667-240013333.33333333338517333.333333333Bng h s phn phi m men m cho di bn trn ctDm ang xtV trKch thc khungS liu bnB/L = L2/L1S liu dmGi IGi i+1L - cmB - cmhs - cmJs(cm4)Jb (cm4)C (cm4)a*L2/L1bV trH sV trH sNhp 1-2N.bin200750205000003.75517333.33333333311888003.881.1888Bin80%Gia50%Nhp 2-3N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia65%Gia65%Nhp 3-4N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia65%Gia65%Nhp 4-5N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia65%Gia65%Nhp 5-6N.gia700750205000001.0714285714517333.333333333K.xt1.1085714286K.xtGia50%Gia50%Nhp 6-7N.gia900750205000000.8333333333517333.333333333K.xt0.8622222222K.xtGia65%Gia65%Nhp 7-8N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia65%Gia65%Nhp 8-9N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia65%Gia65%Nhp 9-10N.gia300750205000002.5517333.333333333K.xt2.5866666667K.xtGia50%Gia50%Nhp10-11N.bin500750205000001.5517333.33333333311888001.5521.1888Gia50%Bin80%Bng h s phn phi m men m cho di bn gia nhpDm ang xtV trKch thc khungS liu bnB/L = L2/L1S liu dmGi IGi i+1L - cmB - cmhs - cmJs(cm4)Jb (cm4)C (cm4)a*L2/L1bV trH sV trH sNhp 1-2N.bin200750205000003.75517333.33333333311888003.881.1888Bin20%Gia50%Nhp 2-3N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia35%Gia35%Nhp 3-4N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia35%Gia35%Nhp 4-5N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia35%Gia35%Nhp 5-6N.gia700750205000001.0714285714517333.333333333K.xt1.1085714286K.xtGia50%Gia50%Nhp 6-7N.gia900750205000000.8333333333517333.333333333K.xt0.8622222222K.xtGia35%Gia35%Nhp 7-8N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia35%Gia35%Nhp 8-9N.gia800750205000000.9375517333.333333333K.xt0.97K.xtGia35%Gia35%Nhp 9-10N.gia300750205000002.5517333.333333333K.xt2.5866666667K.xtGia50%Gia50%Nhp10-11N.bin500750205000001.5517333.33333333311888001.5521.1888Gia50%Bin20%Bng h s phn phi m men dng cho di bn trn ct v gia nhpDm ang xtV trKch thc khungB/L = L2/L1S liu dmH s phn phiGhi ch : Trong tiu chun ACI khng qui nh c r rng v y v cc h s phn phi m men cho sn phng c dm nn h s phn phi trn ch mang tnh cht tham khoL - cmB - cmJb (cm4)C (cm4)a*L2/L1bDi ctDi giaNhp 1-2N.bin2007503.7550000011888003.881.188850%50%Nhp 2-3N.gia8007500.9375500000K.xt0.97K.xt50%50%Nhp 3-4N.gia8007500.9375500000K.xt0.97K.xt50%50%Nhp 4-5N.gia8007500.9375500000K.xt0.97K.xt50%50%Nhp 5-6N.gia7007501.0714285714500000K.xt1.1085714286K.xt50%50%Nhp 6-7N.gia9007500.8333333333500000K.xt0.8622222222K.xt50%50%Nhp 7-8N.gia8007500.9375500000K.xt0.97K.xt50%50%Nhp 8-9N.gia8007500.9375500000K.xt0.97K.xt50%50%Nhp 9-10N.gia3007502.5500000K.xt2.5866666667K.xt50%50%Nhp10-11N.bin5007501.550000011888001.5521.188850%50%Bng phn phi m men cho cc tit din ca di trn ct v di gia nhpNhp dmN.L khung tng ngNi lc di trn ctNi lc di gia nhpGi iG.nhpGi i+1H s 1 ( Ca m men m )H s 2 ( Ca m men dng )Gi iG.nhpGi i+1H s 1( Ca m men m )H s 2( Ca m men dng )Gi iG.nhpGi i+1Bn phiBn triBn phiBn triBn phiBn triM(-)M(+)M(-)M(-)M(+)M(-)M(-)M(+)M(-)T.mT.mT.mT.mT.mT.mT.mT.mT.mNhp 1-2-0.910-37.7250%-0.7280-18.8650%-0.1820-18.86Nhp 2-3-54.63645.38-72.6350%-35.513422.69-47.209550%-19.122622.69-25.4205Nhp 3-4-6840-6950%-44.220-44.8550%-23.820-24.15Nhp 4-5-7042-6250%-45.521-40.350%-24.521-21.7Nhp 5-6-5025-6350%-2512.5-31.550%-2512.5-31.5Nhp 6-7-8057-8750%-5228.5-56.5550%-2828.5-30.45Nhp 7-8-7637-6850%-49.418.5-44.250%-26.618.5-23.8Nhp 8-9-7245-5550%-46.822.5-35.7550%-25.222.5-19.25Nhp 9-10-300-1550%-150-7.550%-150-7.5Nhp10-11-2226-5.550%-1113-4.450%-1113-1.17 : TNH TON CT THP CHO DI CT , DI BN THEO TCVN 356-2005 :Thng s vt liu sn :Ghi ch : B rng bn di ct tng trng hp c th cn phi xc nh li . Kch thc di ct phi tr i b rng ca dm v 1 phn bn tham gia vo cng dm nh xc nh Ib trnS liu b tng v thpMc btRbttMc thp dcRswxrB tr ct thp : Vi sn phng khng dm th ct thp theo phng cnh di bn c b tr pha di . Vi sn phng c dm ni lin cc ct th ct thp theo phng cnh ngn c b tr pha dikg/cm2kg/cm2350145AII28000.7340.5953399204Nhp bnxrKch thc diM men di trn ctTnh ct thp di trn cths - cmB d.ct (cm)M(-)M(+)M(-)Tit din gi (i)Tit din gia nhpTit din gi (i+1)gi (i)giagi (i+1)xAs (cm2)m%xAs (cm2)m%xAs (cm2)m%Ton.mTon.mTon.mNhp 1-20.595339920420255-0.10920-2.8290.00091194262.550.0502.550.050.02390016335.68098345420.1113918324Nhp 2-30.595339920420255-5.96625123.709815-7.9311960.051108202812.14823728780.23820073110.0314619217.47838624610.14663502440.068554018816.29504542490.3195106946Nhp 3-40.595339920420255-7.42563.27-7.53480.064033999415.22065297540.2984441760.02767877776.57914660630.12900287460.065008395515.45226342570.3029855574Nhp 4-50.595339920420255-7.6443.4335-6.77040.06598380815.68411549940.30753167650.02908342936.91302726980.13554955430.058208793913.83602242210.2712945573Nhp 5-60.595339920420255-3.751.875-4.7250.03180831617.56072312590.14824947310.01577565143.74981599010.07352580370.0402511419.56755245120.1875990677Nhp 6-70.595339920420255-12.09866666676.042-13.15730.106681896325.35790574040.4972138380.051774792312.3066832220.24130751420.11662932927.7223749630.5435759797Nhp 7-80.595339920420255-8.29923.02475-7.42560.071857809817.08034474860.33490872060.02557559696.07922803810.11920054980.064033999415.22065297540.298444176Nhp 8-90.595339920420255-7.86243.67875-6.0060.067937695416.1485475520.31663818730.03119422527.4147559260.14538737110.051457933912.23136710660.2398307276Nhp 9-100.595339920420255-2.250-1.1250.01896122294.50701497210.088372842602.550.050.00943524142.550.05Nhp10-110.595339920420255-1.651.95-0.660.01386924793.29667069540.06464060190.01641194033.90105959770.07649136470.00552448792.550.05Thng s vt liu sn :Ghi ch : B rng bn di gia nhp tng trng hp c th cn phi xc nh li . Ct thp xc nh di y l ct thp tng cng cho 2 na di gia nhp nm 2 bn ca di trn ct . Ty theo kch thc ca tng na di gia nhp m phn chia din tch thp tnh c cho hp lS liu b tng v thpMc btRbttMc thp dcRswxrkg/cm2kg/cm2B tr ct thp : Vi sn phng khng dm th ct thp theo phng cnh di bn c b tr pha di . Vi sn phng c dm ni lin cc ct th ct thp theo phng cnh ngn c b tr pha di350145AII28000.7340.5953399204Nhp bnxrKch thc diM men di gia nhpTnh ct thp tng cng di gia nhphs - cmB d.gia (cm)M(-)M(+)M(-)Tit din gi (i)Tit din gia nhpTit din gi (i+1)gi (i)giagi (i+1)xAs (cm2)m%xAs (cm2)m%xAs (cm2)m%Ton.mTon.mTon.mNhp 1-20.595339920420375-0.1820-18.860.00103359793.750.0503.750.050.113492974139.67187442920.5289583257Nhp 2-30.595339920420375-19.122622.69-25.42050.115175960940.260168460.53680224610.138364803348.36591116270.64487881550.156544236854.72059705050.7296079607Nhp 3-40.595339920420375-23.820-24.150.14570841950.93289826390.67910531020.120822526642.23394569720.5631192760.148037099851.74689694010.6899586259Nhp 4-50.595339920420375-24.521-21.70.15037216352.56312663540.70084168850.127302640644.49909266660.59332123560.131867500246.09475565630.6145967421Nhp 5-60.595339920420375-2512.5-31.50.153719144153.73307581510.71644101090.073665479725.75003151320.34333375350.198500766269.38665177190.925155357Nhp 6-70.595339920420375-2828.5-30.450.174085814760.85231825470.81136424340.177529290962.0559976810.82741330240.191098901266.79930340740.8906573788Nhp 7-80.595339920420375-26.618.5-23.80.164519581757.50840733590.76677876450.111190935938.86718875290.51822918340.14570841950.93289826390.6791053102Nhp 8-90.595339920420375-25.222.5-19.250.155061648854.20235312130.72269804160.137114052547.928706750.63904942330.115993613740.54598192650.5406130924Nhp 9-100.595339920420375-150-7.50.089113194631.14983543540.415331139103.750.050.043518224915.21195093180.2028260124Nhp10-110.595339920420375-1113-1.10.06451928622.55294683870.30070595780.076734345226.82276442640.3576368590.00626340683.750.058 : XC NH VNG CA BN :Theo TC ACI318-2002 th nu b dy bn phng 2 phng c chn nh trn th s m bo iu kin vng cho php theo TCACI318-2002

SAN PHANG KO DAMSN PHNG BTCT - TCACI318-2002 - ( SN KHNG DM )Cn phi s dng thm phm mm SAFE la chn kt qu cui cngCNG TRNH :Gi tr kt qa thp di y + vi kt qu thp do SAFE a ra s cho ra kt qu cui cngHNG MC :1 : S LIU THIT K :Tn khung tng ng :KHUNG TRC 1V tr khung :KTGGhi ch:KTB :Khung trc binKTG :Khung trc giaBng s liu nhp khung tng ng :TrcTrcTrcTrcTrcTrcTrcTrcTrcTrc1-:-22-:-33-:-44-:-55-:-66-:-77-:-88-:-99-:-1010-:-11L1 (m)L2 (m)L3 (m)L4 (m)L5 (m)L6 (m)L7 (m)L8 (m)L9 (m)L10 (m)2888798835L1- inchL2-inchL3-inchL4-inchL5-inchL6-inchL7-inchL8-inchL9-inchL10 inch78.7401574803314.9606299213314.9606299213314.9606299213275.5905511811354.3307086614314.9606299213314.9606299213118.1102362205196.8503937008Bng s liu b rng v chiu cao khung tng ngNhp bn tri :KHUNG TRC 1Ltr =8m=314.9606299213inchNhp bn phi :KHUNG TRC 1Lph =7m=275.5905511811inchChiu cao tng di sn cn tnh :Lcd =3.6m=141.7322834646inchChiu cao tng trn sn cn tnh :Lctr =3.6m=141.7322834646inchB rng bn tri :KHUNG TRC 1Btr =4m=157.4803149606inchB rng bn phi:KHUNG TRC 1Bph =3.5m=137.7952755906inchB rng khung tng ng :B =7.5m=295.2755905512inchBng s liu tit din ct cc trc khung ang xt :Qui c khung tng ng nm trong mt phng ngang : Phng khung // vi trc OX :Tit din ct bn di mc sn (b// phng khung,h = vung gc khung)Tit din ct bn trn mc sn (b// phng khung , h= vung gc khung )Ct trc 1b//OX=40cm=15.7480314961inchCt trc 1b//OX=40cm=15.7480314961inchh//OY=40cm=15.7480314961inchh//OY=40cm=15.7480314961inchCt trc 2b//OX=50cm=19.6850393701inchCt trc 2b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 3b//OX=60cm=23.6220472441inchCt trc 3b//OX=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchCt trc 4b//OX=50cm=19.6850393701inchCt trc 4b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 5b//OX=60cm=23.6220472441inchCt trc 5b//OX=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchCt trc 6b//OX=50cm=19.6850393701inchCt trc 6b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 7b//OX=50cm=19.6850393701inchCt trc 7b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 8b//OX=50cm=19.6850393701inchCt trc 8b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 9b//OX=60cm=23.6220472441inchCt trc 9b//OX=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchh//OY=60cm=23.6220472441inchCt trc 10b//OX=50cm=19.6850393701inchCt trc 10b//OX=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchh//OY=50cm=19.6850393701inchCt trc 11b//OX=40cm=15.7480314961inchCt trc 11b//OX=40cm=15.7480314961inchh//OY=40cm=15.7480314961inchh//OY=40cm=15.7480314961inch2 : LA CHN CHIU DY BN SN :Hsn =26cmKch thc ti thiu bn binKiu bn :Bn sn dng thp AIIKhng m ct + Khng dm binKch thc ln nht bn :Lnmax=8mThp sn nhm AIILnmax=314.9606299213inchChiu dy ti thiu bn :hs =9.5442615128inchhs =24cmKch thc ti thiu bn bn trongKiu bn :Bn sn dng thp AIIKhng c m ctKch thc ln nht bn :Lnmax=8mThp sn nhm AIILnmax=314.9606299213inchChiu dy ti thiu bn :hs =8.7489063867inchhs =22cm3 : TI TRNG TC DNG LN BN SN :a : Tnh ti tc dng ln sn :Tn lp vt liu sngH sB dy (m)QQBng chuyn i n vkg/m3kg/m2Psi1kPa = 100kg/m^2 = 0.01kg/cm^2Gch lt sn 40x40cm22001.10.01536.30.05264684551inch = 25.4mm = 2.54cm = 0.0254mVa lt sn18001.10.03569.30.10050761421Psi = Pound/inch^2Bn BTCT sn25001.10.267151.03698332121Psi = 6.895kPa = 689.5kg/m^2Va trt trn18001.10.01529.70.04307469181kg/m^2 = 1Psi/689.5850.31.2332124728b : Hot ti sn tc dng ln sn :Tn dng hot tiGi tr ton phnGi tr di hnGi tr tm thikg/m2Psikg/m2Psikg/m2PsiHot ti sn phng LV2600.3770848441650.0942712111950.2828136331Ghi ch : H s vt ti nhn vo vi hot ti tiu chunc : Tnh ti tng xy trn sn :Tn loi tng xy trn sngH sB dy (m)Chiu cao (m)Chiu di (m)P (kg)KT bnQQkg/m3L1(m)L2(m)kg/m2PsiTng xy 22018001.10.253.681425687254.57142857140.369211644Tng xy 11018001.10.153.65.55880.687105.01071428570.1522998032359.58214285710.5215114472Bng tng hp ti trng b mt tc dng ln sn :H n v SIH n v Pound -inchDealoadLiveloadSumDealoadLiveloadSumkg/m2kg/m2kg/m2PsiPsiPsi1274.88214285711951469.88214285712.58859318350.48078317623.06937635974 : KIM TRA CHNG CHC THNG BN SN :4a : Kim tra theo TCVN 356-2005 :Lc m thng sn - Ct gia - (hc >= bc)Kh nng chng chc thngKt lunTit din cths (cm)ho (cm)Tng lc truyn vo ct ang xt (L2>L1)S liu B. Tngho (cm)Um (cm)Ac (m2)bc (cm)hc (cm)QDin truyn tiP (kg)mcRk(kg/cm2)kg/m2L1 (m)L2 (m)S (m2)50502623.41469.88214285718972105831.51428571435010.523.4293.60.937024Tnh thpLc m thng sn - Ct gc - (hc >= bc)Kh nng chng chc thngKt lunTit din cths (cm)ho (cm)Tng lc truyn vo ct ang xt (L2>L1)S liu B. Tngho (cm)Um (cm)Ac (m2)bc (cm)hc (cm)QDin truyn tiP (kg)mcRk(kg/cm2)kg/m2L1 (m)L2 (m)S (m2)50502623.41469.882142857144.51826457.878571428635010.523.4246.80.538756hs - tLc m thng sn - Ct bin - (hc >=bc)Kh nng chng chc thngKt lunTit din cths (cm)ho (cm)Tng lc truyn vo ct ang xt (L2>L1)S liu B. Tngho (cm)Um (cm)Ac (m2)bc (cm)hc (cm)QDin truyn tiP (kg)mcRk(kg/cm2)kg/m2L1 (m)L2 (m)S (m2)50502623.41469.8821428571493652915.757142857135010.523.4270.20.710512hs - tKt lun chung v chiu dy sn :Tnh thp chu ctXem thm mc a,ba : Tnh ct thp chu ct thng ( Dm tch hp ):Tnh ct ai chu ct thng cho ct gia :Nt ( kg )Fb ( kg )S liu ct ai chu ctDin tch 1 ai n chu ctmc thpRs (kg/cm2)Nhnh ai (n1)S thanh ai tham gia chu ctAstt (cm2)Chn .K ai (mm)Asch (cm2)Loi ai104454.19944068672137.52AII1750213.43589743590.8590175151121.1304KnB tr ai chu ctPhm vi ct ai chu ct 1 pha ct :23.4cmSo =35.1cmBc ai b tr :7.8cmai u tin cch mp ct :5cmS lng ai b tr trong phm vi tnh :3.358974359aiTnh ct ai chu ct thng cho ct gc :Nt ( kg )Fb ( kg )S liu ct ai chu ctDin tch 1 ai n chu ctmc thpRs (kg/cm2)Nhnh ai (n1)S thanh ai tham gia chu ctAstt (cm2)Chn .K ai (mm)Asch (cm2)Loi ai25665.970747671460638.76AII175026.7179487179080.5024KnB tr ai chu ctPhm vi ct ai chu ct 1 pha ct :23.4cmSo =35.1cmBc ai b tr :7.8cmai u tin cch mp ct :5cmS lng ai b tr trong phm vi tnh :3.358974359aiTnh ct ai chu ct thng cho ct bin :Nt ( kg )Fb ( kg )S liu ct ai chu ctDin tch 1 ai n chu ctmc thpRs (kg/cm2)Nhnh ai (n1)S thanh ai tham gia chu ctAstt (cm2)Chn .K ai (mm)Asch (cm2)Loi ai51871.388241771466388.14AII175026.7179487179080.5024KnB tr ai chu ctPhm vi ct ai chu ct 1 pha ct :23.4cmSo =35.1cmBc ai b tr :7.8cmai u tin cch mp ct :5cmS lng ai b tr trong phm vi tnh :3.358974359aib : Cu to m ct , bn u ct ( khi khng tnh ct ai chu ct )Cu to bn u ctCu to m ctChiu dy bn sn phng :hs =26cmChiu dy bn sn phng :hs =26cmChiu dy bn u ct :hc =6.5cmChiu cao m ct :hmc =Xem hnhcmB rng bn u ct gia :C1 =300cmB rng bn u ct gia :C1 =225cmB rng bn u ct bin :C2 =300cmB rng bn u ct bin :C2 =225cmB rng bn u ct gc :C3 =Hnh vcmB rng bn u ct gc :C3 =Hnh vcm4b : Kim tra theo TCACI 318-2002 :Lc m thng sn - Ct gia - (hc >= bc)Tit din cths (inch)ho (inch)Tng lc truyn vo ct ang xt (L2>L1)Din tch y trn thp TVu (Pound)bc(inch)hc(inch)QDin truyn tiP (Pound)d (inch)bo (inch)At (inch^2)PsiL1 (inch)L2 (inch)S(inch^2)19.719.710.29.23.07314.96354.33111600.22342543.19.2115.5905511811835.0734701469339979.9320587S liu BT sna - Ct giabo (inch)d (inch)bcVc1 (Pound)Vc2 (Pound)Vc3 (Pound)Vc PoundKt lunmcf'c (Psi)291.66666666674229.166666666740115.59055118119.21277007.716372257415511.574558385359279.762924235277007.716372257Tnh thp chu ctLc m thng sn - Ct gc - (hc >= bc)Tit din cths (inch)ho (inch)Tng lc truyn vo ct ang xt (L2>L1)Din tch y trn thp TVu (Pound)bc(inch)hc(inch)QDin truyn tiP (Pound)d (inch)bo (inch)At (inch^2)PsiL1 (inch)L2 (inch)S(inch^2)19.719.710.29.23.07157.48177.1727900.0685635.89.297.1653543307590.069130138383824.6274680175S liu BT sna - Ct gcbo (inch)d (inch)bcVc1 (Pound)Vc2 (Pound)Vc3 (Pound)Vc PoundKt lunmcf'c (Psi)291.66666666674229.16666666672097.16535433079.21232852.535424635349278.803136953226814.220081371226814.220081371hs - tLc m thng sn - Ct bin - (hc >= bc)Tit din cths (inch)ho (inch)Tng lc truyn vo ct ang xt (L2>L1)Din tch y trn thp TVu (Pound)bc(inch)hc(inch)QDin truyn tiP (Pound)d (inch)bo (inch)At (inch^2)PsiL1 (inch)L2 (inch)S(inch^2)19.719.710.29.23.07157.48354.3355800.11171271.59.2106.3779527559701.9623039246169116.956912229S liu BT sna - Ct binbo (inch)d (inch)bcVc1 (Pound)Vc2 (Pound)Vc3 (Pound)Vc PoundKt lunmcf'c (Psi)291.66666666674229.166666666730106.37795275599.21254930.125898446382395.188847669293046.991502803254930.125898446hs - tKt lun chung v chiu dy sn :Tnh thp chu ctXem cc mc a,b,ca : Tnh ct thp chu ct thng dng vai b :Tnh ct thp chu ct thng dng vai b cho ct gia : (TCACI 318-2002)Vu (Pound)Vc (Pound)Kh nng chu ct ca ct thpTnh thpmc thpfs - Psibo-inchd-inchf'c - PsiVs (Pound)iu kin Vn=Vc+VsGc (a)Sin(a)Avtt (inch^2)339979.9320587277007.716372257AII42775115.59055118119.24229.1666666667104523.373142281hs - Hp l450.70682518111.0Ghi ch : Av l tng din tch 1 pha cnh ct ( Vi ct gia c 4 cnh ct )6.6cm2Tnh ct thp chu ct thng dng vai b cho ct gc : (TCACI 318-2002)Vu (Pound)Vc (Pound)Kh nng chu ct ca ct thpTnh thpmc thpfs - Psibo-inchd-inchf'c - PsiVs (Pound)iu kin Vn=Vc+VsGc (a)Sin(a)Avtt (inch^2)83824.6274680175226814.220081371AII4277597.16535433079.24229.1666666667-108967.459601148hs - Hp l450.7068251811Cu toGhi ch : Av l tng din tch 1 pha cnh ct ( Vi ct gc c 2 cnh ct )Cu tocm2Tnh ct thp chu ct thng dng vai b cho ct bin : (TCACI 318-2002)Vu (Pound)Vc (Pound)Kh nng chu ct ca ct thpTnh thpmc thpfs - Psibo-inchd-inchf'c - PsiVs (Pound)iu kin Vn=Vc+VsGc (a)Sin(a)Avtt (inch^2)169116.956912229254930.125898446AII42775106.37795275599.24229.1666666667-47573.6501014499hs - Hp l450.7068251811Cu toGhi ch : Av l tng din tch 1 pha cnh ct ( Vi ct bin c 3 cnh ct )Cu tocm2b : Tnh ct thp chu ct thng dng dm tch hp:Tnh ct thp chu ct thng dng dm tch hp cho ct gia : (TCACI 318-2002)Vu (Pound)Vc (Pound)Kh nng chu ct ca ct thpTnh thpmc thpfs - Psibo-inchd-inchf'c - PsiVs (Pound)iu kin Vn=Vc+Vsai kn (n1)Bc ai (s)Avtt (inch^2)339979.9320587138503.858186128AII42775115.59055118119.24229.1666666667207755.787279193hs - Hp l24.610.14Avtt : Dn tch cn thit ca 1 nhnh ai (n) chu ctbo' =166.9032619776inchS ai chu ct2.50.92bo' : Chu vi din tch cn phi b tr ct ai chu ct423.9342854232cmcm2Tnh ct thp chu ct thng dng dm tch hp cho ct gc : (TCACI 318-2002)Vu (Pound)Vc (Pound)Kh nng chu ct ca ct thpTnh thpmc thpfs - Psibo-inchd-inchf'c - PsiVs (Pound)iu kin Vn=Vc+Vsai kn (n1)Bc ai (s)Avtt (inch^2)83824.6274680175116426.267712318AII4277597.16535433079.24229.1666666667-15137.7000874526hs - Hp l24.61Cu toAvtt : Dn tch cn thit ca 1 nhnh ai (n) chu ctbo' =41.1512634694inchS ai chu ct2.5Cu tobo' : Chu vi din tch cn phi b tr ct ai chu ct104.5242092124cmcm2Tnh ct thp chu ct thng dng dm tch hp cho ct bin : (TCACI 318-2002)Vu (Pound)Vc (Pound)Kh nng chu ct ca ct thpTnh thpmc thpfs - Psibo-inchd-inchf'c - PsiVs (Pound)iu kin Vn=Vc+Vsai kn (n1)Bc ai (s)Avtt (inch^2)169116.956912229127465.062949223AI34075106.37795275599.24229.166666666760771.6534053897hs - Hp l24.610.07Avtt : Dn tch cn thit ca 1 nhnh ai (n) chu ctbo' =83.0230525474inchS ai chu ct2.50.45bo' : Chu vi din tch cn phi b tr ct ai chu ct210.8785534705cmcm2c : Cu to m ct , bn u ct ( khi khng tnh ct ai chu ct )Cu to bn u ct ( TCACI 318-2002 )Cu to m ct ( TCACI 318-2002 )Chiu dy bn sn phng :hs =26cmChiu dy bn sn phng :hs =26cmChiu dy bn u ct :hc =6.5cmChiu cao m ct :hmc =Xem hnhcmB rng bn u ct gia :C1 =300cmB rng bn u ct gia :C1 =225cmB rng bn u ct bin :C2 =300cmB rng bn u ct bin :C2 =225cmB rng bn u ct gc :C3 =Hnh vcmB rng bn u ct gc :C3 =Hnh vcm5 : TNH TON CNG KHUNG TNG NG :Cng thc xc nh cng un ti nt khung ca dm : K=k*E*J/L ( k : Tra bng A-20 to A-22 off ACI318-2002) . L : nhp dm , J : m men qun tnh ca ton tit din ly i vi trc trung tm5a : Xc nh cng sn khung tng ng :Kb = k*(E*J)/L = k*(E*Jt)/L => Jt = J (Trong : J : M men qun tnh ton tit din dm+bn)Tn khung t.ngLtri (cm)Lphi (cm)Kch thc dmSn khung T.ngPhn dm cn liL - t tm dm n mp tri sn (cm)Qui c chn h trc c s xoy l ti trng tm tit din bn snb - cmh - cmhs (cm)Bs (cm)b - cmh - cmKHUNG TRC 1350400002675000350Tit din bn sn :Tit din dmTo trng tmTit din bn snTit din dmJx - Ton tit din (cm4)x1 - cmy1 - cmF1 (cm2)x2 - cmy2 - cmF2(cm2)X (cm)Y (cm)F1 (cm2)Jx1(cm4)a1 (cm)F2 (cm2)Jx2 (cm4)a2 (cm)001950000000195001098500000131098500Xc nh tit din dm tng ng cho khung tng ng :Jx =1098500cm4bt =30cmht =76cm5b : Xc nh cng un ca ct khung tng ng :a : Xc nh h s xon ca cc dm , bn lin kt vo vi khungTn trcLoi khungV tr trcDm v.gc khunghs - inchbc-inchhw-inchTit din 1Tit din 2C - inch^4b - cmh - cmb - inchh - inchx1-inchy1-inchx2 - inchy2 - inchCt trc 1KTGBin000010.236220472415.7480314961000010.23622047243324.6338011886Ct trc 2KTGGia000010.236220472419.6850393701000010.23622047244732.1840980508Ct trc 3KTGGia000010.236220472423.6220472441000010.23622047246139.734394913Ct trc 4KTGGia000010.236220472419.6850393701000010.23622047244732.1840980508Ct trc 5KTGGia000010.236220472423.6220472441000010.23622047246139.734394913Ct trc 6KTGGia000010.236220472419.6850393701000010.23622047244732.1840980508Ct trc 7KTGGia000010.236220472419.6850393701000010.23622047244732.1840980508Ct trc 8KTGGia000010.236220472419.6850393701000010.23622047244732.1840980508Ct trc 9KTGGia000010.236220472423.6220472441000010.23622047246139.734394913Ct trc 10KTGGia000010.236220472419.6850393701000010.23622047244732.1840980508Ct trc 11KTGBin000010.236220472415.7480314961000010.23622047243324.6338011886b : Xc nh cng xon ph thm cho ct :Tn trcLoi khungV tr trcLtr khung (inch)Lph khung (inch)ci - inchCiKti/ECt trc 1KTGBin137.7952755906157.480314960615.74803149613324.6338011886573.1500029858Ct trc 2KTGGia137.7952755906157.480314960619.68503937014732.1840980508894.5016739863Ct trc 3KTGGia137.7952755906157.480314960623.62204724416139.7343949131276.3245259252Ct trc 4KTGGia137.7952755906157.480314960619.68503937014732.1840980508894.5016739863Ct trc 5KTGGia137.7952755906157.480314960623.62204724416139.7343949131276.3245259252Ct trc 6KTGGia137.7952755906157.480314960619.68503937014732.1840980508894.5016739863Ct trc 7KTGGia137.7952755906157.480314960619.68503937014732.1840980508894.5016739863Ct trc 8KTGGia137.7952755906157.480314960619.68503937014732.1840980508894.5016739863Ct trc 9KTGGia137.7952755906157.480314960623.62204724416139.7343949131276.3245259252Ct trc 10KTGGia137.7952755906157.480314960619.68503937014732.1840980508894.5016739863Ct trc 11KTGBin137.7952755906157.480314960615.74803149613324.6338011886573.1500029858c : Xc nh cng un ca tit din ct khung :Xc nh h s cng khung :B dy bn u ct hoc m ct :0inchVi bn sn c bn u ct v m ct th xem li LuTn trcLoi khunghs - inchta/tbCt di mc sn:Cn bn triCn bn phikiTit din ct diKci/ELc-inchLu-inchLc/LuLc/LukitriLc/Lukiphibc - inchhc - inchJ-inch^4Ct trc 1KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149715.748031496115.74803149615125.3538347282174.9320263187Ct trc 2KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 3KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149723.622047244123.622047244125947.1037883114885.5933832383Ct trc 4KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 5KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149723.622047244123.622047244125947.1037883114885.5933832383Ct trc 6KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 7KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 8KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 9KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149723.622047244123.622047244125947.1037883114885.5933832383Ct trc 10KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 11KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149715.748031496115.74803149615125.3538347282174.9320263187Xc nh h s cng khung :B dy bn u ct hoc m ct :0inchVi bn sn c bn u ct v m ct th xem li LuTn trcLoi khunghs - inchta/tbCt trn mc sn:Cn bn triCn bn phikiTit din ct trnKci/ELc-inchLu-inchLc/LuLc/LukitriLc/Lukiphibc - inchhc - inchJ-inch^4Ct trc 1KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149715.748031496115.74803149615125.3538347282174.9320263187Ct trc 2KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 3KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149723.622047244123.622047244125947.1037883114885.5933832383Ct trc 4KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 5KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149723.622047244123.622047244125947.1037883114885.5933832383Ct trc 6KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 7KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 8KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 9KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149723.622047244123.622047244125947.1037883114885.5933832383Ct trc 10KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149719.685039370119.685039370112513.0708855668427.0801423796Ct trc 11KTG10.23622047241141.7322834646131.49606299211.07784431141.054.521.15.094.837425149715.748031496115.74803149615125.3538347282174.9320263187d : Xc nh cng tng ng ca ct khungTn trcLoi khungV tr trcKti/Esum(Kci/E)Keci/ECng thc xc nh Iti =Lci*(Keci/E)/(n*4)Tit din chnGhi ch : Kec : c xc nh trn l Kec tng cng ca ct trn v ct di ti nt lin kt. Nu ct trn v ct di c Lct = Lcd v tit din nh nhau th cng un ca 1 phn ct tng ng ti nt lin kt c xc nh theo cng thc: Kec = Kect + Kecd = 4*E*Jct/Lct + 4*E*Jcd/Lcd = 4*E*J*(1/Lct +1/Lcd) = 2*(4*E*J/L) = 2*Kecct=2*Keccd => Jct=Jcd = (Kec/E)*L/(2*4)Lci(inch)It - inch^4bc=hc(inch)bc (cm)hc(cm)bc (cm)hc (cm)Ct trc 1KTGBin573.1500029858349.8640526373217141.73228346463178.954150196513.975468560735.497690144135.49769014413535Ct trc 2KTGGia894.5016739863854.1602847591436141.73228346466387.207416984616.638840798642.262655628542.26265562854242Ct trc 3KTGGia1276.32452592521771.1867664765741141.732283464610855.322697214718.997917443348.254710305948.25471030594848Ct trc 4KTGGia894.5016739863854.1602847591436141.73228346466387.207416984616.638840798642.262655628542.26265562854242Ct trc 5KTGGia1276.32452592521771.1867664765741141.732283464610855.322697214718.997917443348.254710305948.25471030594848Ct trc 6KTGGia894.5016739863854.1602847591436141.73228346466387.207416984616.638840798642.262655628542.26265562854242Ct trc 7KTGGia894.5016739863854.1602847591436141.73228346466387.207416984616.638840798642.262655628542.26265562854242Ct trc 8KTGGia894.5016739863854.1602847591436141.73228346466387.207416984616.638840798642.262655628542.26265562854242Ct trc 9KTGGia1276.32452592521771.1867664765741141.732283464610855.322697214718.997917443348.254710305948.25471030594848Ct trc 10KTGGia894.5016739863854.1602847591436141.73228346466387.207416984616.638840798642.262655628542.26265562854242Ct trc 11KTGBin573.1500029858349.8640526373217141.73228346463178.954150196513.975468560735.497690144135.49769014413535Nhn xt :T cng thc :1/Kec = 1/sum(Kci) + 1/Kt = (Kt+sum(Kci))/(Kt*sum(Kci)) => Kec = Kt*sum(Kci)/(Kt+sum(Kci)) = sum(Kci)/(1+sum(Kci)/Kt)Vi mt tit din ct c th sum(Kci) = consnt , Khi nu Kt gim th Kec gim v Kt tng th Kec tng v Kec < sum(Kci)Hnh khung tng ng :6 : PHN PHI M MEN CHO CC TIT DIN THUC DI TRN CT V DI GIA NHPBng phn phi m men cho cho di ct v di gia nhp ( theo t l % ) :Loi sn phng :V trM men tng caDi trn ct L2/L1Di gia nhp L2/L1iu kinkhung t , Mot0.5120.512Sn phng khng dmM.men m nhp trongMot75%75%75%25%25%25%a1*L2/L1 = 0Sn phng c dmM.men m nhp trongMot90%75%45%10%25%55%a1*L2/L1 >=1Sn phng khng dm khng hoc c dm binM.men m nhp binbt = 0Mot100%100%100%0%0%0%a1*L2/L1 = 0bt >=2.5Mot75%75%75%25%25%25%Sn phng c dm c hoc khng c dm binM.men m nhp binbt = 0Mot100%100%100%0%0%0%a1*L2/L1 >=1bt >=2.5Mot90%75%45%10%25%55%Sn phng khng dmM men dngMot60%60%60%40%40%40%a1*L2/L1 = 0Sn phng c dmM men dngMot90%75%45%10%25%55%a1*L2/L1 >=1Xc nh t s cng dm trn cng bn ( a )Dm ni ctV trhs - cmKch thc dmhw (cm)Thng s dmThng s bnTrng tmH trc c s t ti trng tm tit din dmb - cmh - cmx1 - cmy1 - cmF1 - cm2x2 -cmy2 -cmF2 - cm2X - cmY - cmNhp 1-2KTG260000000-130K.xetK.xetNhp 2-3KTG260000000-130K.xetK.xetNhp 3-4KTG260000000-130K.xetK.xetNhp 4-5KTG260000000-130K.xetK.xetNhp 5-6KTG260000000-130K.xetK.xetNhp 6-7KTG260000000-130K.xetK.xetNhp 7-8KTG260000000-130K.xetK.xetNhp 8-9KTG260000000-130K.xetK.xetNhp 9-10KTG260000000-130K.xetK.xetNhp10-11KTG260000000-130K.xetK.xetDm ni ctV trhs - cmKch thc dmhw (cm)Xc nh m men qun tnh ca tit din dm ( Jb )Xc nh Jx ca ton tit din dm bn theo cng thc ca sc bn vt liu ( cng thc di trc song song )b - cmh - cmF1(cm2)J1(cm4)a1(cm)F2(cm2)J2(cm4)a2(cm)Jx(cm4)Nhp 1-2KTG2600000K.xet00K.xet0Nhp 2-3KTG2600000K.xet00K.xet0Nhp 3-4KTG2600000K.xet00K.xet0Nhp 4-5KTG2600000K.xet00K.xet0Nhp 5-6KTG2600000K.xet00K.xet0Nhp 6-7KTG2600000K.xet00K.xet0Nhp 7-8KTG2600000K.xet00K.xet0Nhp 8-9KTG2600000K.xet00K.xet0Nhp 9-10KTG2600000K.xet00K.xet0Nhp10-11KTG2600000K.xet00K.xet0Dm ni ctV trhs - cmKch thc dmKch thc bnJd (cm4)aCbM men mM men dngb - cmh - cmB - cmJs (cm4)Di ctDi giaD.ctD.giaNhp 1-2Bin2600750109850000138381.7066666670100%0%60%40%Nhp 2-3Gia26007501098500000075%25%60%40%Nhp 3-4Gia26007501098500000075%25%60%40%Nhp 4-5Gia26007501098500000075%25%60%40%Nhp 5-6Gia26007501098500000075%25%60%40%Nhp 6-7Gia26007501098500000075%25%60%40%Nhp 7-8Gia26007501098500000075%25%60%40%Nhp 8-9Gia26007501098500000075%25%60%40%Nhp 9-10Gia26007501098500000075%25%60%40%Nhp10-11Bin2600750109850000138381.7066666670100%0%60%40%Bng phn phi m men cho cc tit din ca di trn ct v di gia nhpNhp dmN.L khung tng ngNi lc di trn ctNi lc di gia nhpGi iG.nhpGi i+1H s 1 ( Ca m men m )H s 2 ( Ca m men dng )Gi iG.nhpGi i+1H s 1( Ca m men m )H s 2( Ca m men dng )Gi iG.nhpGi i+1Bn phiBn triBn phiBn triBn phiBn triM(-)M(+)M(-)M(-)M(+)M(-)M(-)M(+)M(-)T.mT.mT.mT.mT.mT.mT.mT.mT.mNhp 1-2-0.910-37.72100%60%-0.910-37.720%40%000Nhp 2-3-54.63645.38-72.6375%60%-40.97727.228-54.472525%40%-13.65918.152-18.1575Nhp 3-4-6840-6975%60%-5124-51.7525%40%-1716-17.25Nhp 4-5-7042-6275%60%-52.525.2-46.525%40%-17.516.8-15.5Nhp 5-6-5025-6375%60%-37.515-47.2525%40%-12.510-15.75Nhp 6-7-8057-8775%60%-6034.2-65.2525%40%-2022.8-21.75Nhp 7-8-7637-6875%60%-5722.2-5125%40%-1914.8-17Nhp 8-9-7245-5575%60%-5427-41.2525%40%-1818-13.75Nhp 9-10-300-1575%60%-22.50-11.2525%40%-7.50-3.75Nhp10-11-2226-5.5100%60%-2215.6-5.50%40%010.407 : TNH TON CT THP CHO DI CT , DI BN THEO TCVN 356-2005 :Thng s vt liu sn :Ghi ch : B rng bn di ct tng trng hp c th cn phi xc nh liS liu b tng v thpMc btRbttMc thp dcRswxrB tr ct thp : Vi sn phng khng dm th ct thp theo phng cnh di bn c b tr pha di . Vi sn phng c dm ni lin cc ct th ct thp theo phng cnh ngn c b tr pha dikg/cm2kg/cm2350145AII28000.7340.5953399204Nhp bnxrKch thc diM men di trn ctTnh ct thp di trn cths - cmB d.ct (cm)M(-)M(+)M(-)Tit din gi (i)Tit din gia nhpTit din gi (i+1)gi (i)giagi (i+1)xAs (cm2)m%xAs (cm2)m%xAs (cm2)m%Ton.mTon.mTon.mNhp 1-20.595339920426375-0.910-37.720.00306108664.8750.0504.8750.050.135927691161.76821284840.6335201318Nhp 2-30.595339920426375-40.97727.228-54.47250.148681907967.56397947750.69296389210.096064405543.65355285950.44772874730.203703396192.56682452720.9494033285Nhp 3-40.595339920426375-5124-51.750.189189088285.97123789310.88175628610.084148911538.2389183060.39219403390.192301844687.38573555380.8962639544Nhp 4-50.595339920426375-52.525.2-46.50.195426643788.80570562260.910827750.088560272340.24352733190.41275412650.170757887277.59573811950.7958537243Nhp 5-60.595339920426375-37.515-47.250.135072965261.3798086110.62953649860.051717623.50149330860.2410409570.173801278.9786792270.8100377357Nhp 6-70.595339920426375-6034.2-65.250.2273694021103.32112249841.05970382050.122351959355.5991336690.57024752480.2505389474113.84981899331.1676904512Nhp 7-80.595339920426375-5722.2-510.214436419697.44412123290.99942688440.077571425535.24997946010.36153825090.189189088285.97123789310.8817562861Nhp 8-90.595339920426375-5427-41.250.201712935991.6623202850.94012636190.095217640343.26876611350.44378221650.149759649868.05372658970.6979869394Nhp 9-100.595339920426375-22.50-11.250.078664412235.74665410780.366632349804.8750.050.038527362517.50759030950.1795650288Nhp10-110.595339920426375-2215.6-5.50.076843486634.91918972060.35814553560.053845102224.4682721160.25095663710.01864660448.47338330760.0869064955Thng s vt liu sn :Ghi ch : B rng bn di gia nhp tng trng hp c th cn phi xc nh li . Ct thp xc nh di y l ct thp tng cng cho 2 na di gia nhp nm 2 bn ca di trn ct . Ty theo kch thc ca tng na di gia nhp m phn chia din tch thp tnh c cho hp lS liu b tng v thpMc btRbttMc thp dcRswxrkg/cm2kg/cm2B tr ct thp : Vi sn phng khng dm th ct thp theo phng cnh di bn c b tr pha di . Vi sn phng c dm ni lin cc ct th ct thp theo phng cnh ngn c b tr pha di350145AII28000.7340.5953399204Nhp bnxrKch thc diM men di gia nhpTnh ct thp tng cng di gia nhphs - cmB d.gia (cm)M(-)M(+)M(-)Tit din gi (i)Tit din gia nhpTit din gi (i+1)gi (i)giagi (i+1)xAs (cm2)m%xAs (cm2)m%xAs (cm2)m%Ton.mTon.mTon.mNhp 1-20.59533992042637500004.8750.0504.8750.0504.8750.05Nhp 2-30.595339920426375-13.65918.152-18.15750.046979801921.34854479980.21895943380.062948041728.60482661330.29338283710.062967755628.61378499780.2934747179Nhp 3-40.595339920426375-1716-17.250.058827976326.73258797190.27418038950.055266098725.11400084510.25757949580.059720553927.13819278040.2783404388Nhp 4-50.595339920426375-17.516.8-15.50.060613979627.54418298270.28250444080.058114523226.40838087230.27085518840.053490186424.30699140770.249302476Nhp 5-60.595339920426375-12.510-15.750.042903910219.49637953630.1999628670.034170646515.52781296620.15925962020.054377725724.71030667730.2534390428Nhp 6-70.595339920426375-2022.8-21.750.069595421231.62552644160.32436437380.079758697136.24391866430.37173249910.075934369334.50606898930.3539083999Nhp 7-80.595339920426375-1914.8-170.065992480629.98827947480.30757209720.051009492523.17971534610.23774067020.058827976326.73258797190.2741803895Nhp 8-90.595339920426375-1818-13.750.062403385128.3573239770.29084434850.062403385128.3573239770.29084434850.047300562821.49430484380.2204544087Nhp 9-100.595339920426375-7.50-3.750.025515646611.59481099650.118921138404.8750.050.0126753945.75994802890.05907639Nhp10-110.595339920426375010.4004.8750.050.035562654316.16036867550.16574737104.8750.058 : XC NH VNG CA BN :Theo TC ACI318-2002 th nu b dy bn phng 2 phng c chn theo b dy ly theo bng ca tiu chun v tng thm 10% th vng ca bn s khng vtqu gii hn vng sn cho php ca TCACI.

FILE KIEM TRA JXFILE KIM TRA M MEN QUN TNH CA TIT DIN1 : Xc nh m men qun tnh Jx ca tit din dm , sn khung tng ng :( H trc c s xoy t ti trong tm bn sn )Kch thc dm , bn khung tThng s phn bn snThng s phn dmTo trng tm trong h xoyTo T.tmJx (cm4)hs - cmLtr - cm (Ltr