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  • Page 1

    THUYT MINH TNH TON MNG CU THP.

    I./ Cn c thit k:

    I.1/ Bn v:

    B bn v thit k kt cu, kin trc D n xy dng 2.220 cn h ti nh c (khu 1), phng Bnh

    Khnh, qun 2, khu th mi Th Thim c Ch u t Lin danh Vietinbank -Thun Vit - Coseco -

    Cofico - Trng Sn ph duyt ngy 19/2/2013 .

    I.2/ Cc quy phm v tiu chun thit k:

    - Ti trng v tc ng - Tiu chun thit k : TCVN 2737 : 1995

    - Ch dn tnh ton thnh phn ng ca ti trng gi

    theo tiu chun TCVN 2737 1995 : TCXD 229 : 1999

    - Tiu chun thit k nn nh v cng trnh : TCVN 9362 : 2012

    - Kt cu b tng v b tng ct thp - Tiu chun thit k : TCXDVN 356 : 2005

    - Tiu chun thit k kt cu thp : TCXDVN 338 : 2005

    - Mng cc Tiu chun thit k : TCXD 205 : 1998

    II./Cc thng s cu thp tnh ton:

    Thng s cu thp i din tnh ton:

    Tr thp: kch thc L x W x H = 1600x1600 x2500

    Thanh ng: L 160x160x10

    Thanh ging ng: L 100x100x8

    Cn thp:

    Thanh ngang: L 100x100x8

    Thanh ging ngang: L 75x75x6

    Bn knh cu ln nht s dng: Rmaxsd = 55 (m)

    Trng lng ti trng cu ng vi trng hp Rmaxsd : Q = 1,6 (T)

  • Page 2

    Trng lng ti trng cu ln nht: Q = 8.0(T)

    Bn knh tng ng ti trng cu ln nht: Rmax = 13,5 (m)

    Bn knh ui cn cu: R = 14,3 (m)

    III./M HNH, TI TRNG & T HP TI TRNG TNH MNG CU THP TRONG ETABS:

    III.1/ Cc trng hp ti v cc t hp ti trng Cc trng hp ti:

    1. Ti trng bn thn cu thp 2. Hot ti s dng. 3. Gi tri theo phng X. 4. Gi phi theo phng X. 5. Gi tri theo phng Y. 6. Gi phi theo phng Y.

    Cc t hp ti trng: Trng hp 1: tnh ti + hot ti Trng hp 2: tnh ti + hot ti + gi tri phng X Trng hp 3: tnh ti + hot ti + gi phi phng X Trng hp 4: tnh ti + hot ti + gi tri phng Y Trng hp 5: tnh ti + hot ti + gi phi phng Y Trng hp 6: tnh ti + gi tri phng X Trng hp 7: tnh ti + gi phi phng X Trng hp 8: tnh ti + gi tri phng Y Trng hp 9: tnh ti + gi phi phng Y

    5,2

    M

    M

    5,2

    M

    M

    4,0

    M 4,0

    M

  • Page 3

    III.2/ Cc c s tnh ton thit k cng trnh. III.2.1/ M hnh tnh : m bo tnh ton chnh xc lc tc dng xung cc cc ca cng trnh, y s dng m hnh tnh ton h kt cu khung khng gian ngm vo h mng cc.

    III.2.2/ Tnh ton trn my tnh: S dng phn mm tnh ton kt cu ETABS V 9.0.7.Vic tnh ton cc cu kin c ly ni lc t m hnh trn ETABS, cch tnh tun theo cc cng thc v quy phm Vit Nam hin hnh.

    III.3/ Xc nh ti trng do gi:

    III.3.1/ Ti trng do gi tnh gy ra theo phng X:

    Tnh ton theo cng thc: Q

    tt = qo

    tc x n x c x k x B

    Ti trng gi tiu chun vng: IIA qo

    tc = 83 KG/m

    2 : Gi tr p lc gi tiu chun.

    n = 1,2 H s tin cy.

    Din tch n gi 2x 0,16x1 1,6x0,1 1,887x0,1 0,67iA Din tch gii hn bi ng bao ngoi: A = 1,6 H s kh ng Ct

    1(1 )t xC C k , vi 1 1,4 0,67

    0,5861,6

    x xi iC C AA

    0,586 (1 0,95) 1 1,143tC : H s kh ng.

    K: H s k n nh hng ca cao n ti trng gi. B = Ai = 0,67 (m

    2) Din tch n gi ca cc thanh thp tr thp.

    Loi a hnh n gi : A Kt qu tnh ton cho bng sau:

    Cao qotc Cao c k B

    Qtc

    (Kg/m2) Fx (KG)

    (m) Kg/m2 Htt(m)

    1 83 1 1,143 1,000 0,67 94,87 76,275

    2 83 1 1,143 1,000 0,67 94,87 76,275

    3 83 1 1,143 1,000 0,67 94,87 76,275

    4 83 1 1,143 1,035 0,67 98,19 78,944

    5 83 1 1,143 1,070 0,67 101,51 81,614

    6 83 1 1,143 1,092 0,67 103,60 83,292

    7 83 1 1,143 1,114 0,67 105,68 84,970

    8 83 1 1,143 1,136 0,67 107,77 86,648

    9 83 1 1,143 1,158 0,67 109,86 88,326

    10 83 1 1,143 1,180 0,67 111,95 90,004

    11 83 1 1,143 1,192 0,67 113,08 90,919

    12 83 1 1,143 1,204 0,67 114,22 91,835

    13 83 1 1,143 1,216 0,67 115,36 92,750

    14 83 1 1,143 1,228 0,67 116,50 93,665

  • Page 4

    15 83 1 1,143 1,240 0,67 117,64 94,581

    16 83 1 1,143 1,250 0,67 118,59 95,343

    17 83 1 1,143 1,260 0,67 119,53 96,106

    18 83 1 1,143 1,270 0,67 120,48 96,869

    19 83 1 1,143 1,280 0,67 121,43 97,632

    20 83 1 1,143 1,290 0,67 122,38 98,394

    21 83 1 1,143 1,298 0,67 123,14 99,005

    22 83 1 1,143 1,306 0,67 123,90 99,615

    23 83 1 1,143 1,314 0,67 124,66 100,225

    24 83 1 1,143 1,322 0,67 125,42 100,835

    25 83 1 1,143 1,330 0,67 126,18 101,445

    26 83 1 1,143 1,338 0,67 126,93 102,056

    27 83 1 1,143 1,346 0,67 127,69 102,666

    28 83 1 1,143 1,354 0,67 128,45 103,276

    29 83 1 1,143 1,362 0,67 129,21 103,886

    30 83 1 1,143 1,370 0,67 129,97 104,496

    31 83 1 1,143 1,376 0,67 130,54 104,954

    32 83 1 1,143 1,382 0,67 131,11 105,412

    33 83 1 1,143 1,388 0,67 131,68 105,869

    34 83 1 1,143 1,394 0,67 132,25 106,327

    35 83 1 1,143 1,400 0,67 132,82 106,785

    36 83 1 1,143 1,406 0,67 133,39 107,242

    37 83 1 1,143 1,412 0,67 133,96 107,700

    38 83 1 1,143 1,418 0,67 134,52 108,157

    39 83 1 1,143 1,424 0,67 135,09 108,615

    40 83 1 1,143 1,430 0,67 135,66 109,073

    41 83 1 1,143 1,434 0,67 136,04 109,378

    42 83 1 1,143 1,438 0,67 136,42 109,683

    43 83 1 1,143 1,442 0,67 136,80 109,988

    44 83 1 1,143 1,446 0,67 137,18 110,293

    45 83 1 1,143 1,450 0,67 137,56 110,598

    46 83 1 1,143 1,454 0,67 137,94 110,903

    47 83 1 1,143 1,458 0,67 138,32 111,208

    III.3.2/ Ti trng do gi ng gy ra theo phng X:

  • Page 5

    Tnh tan cho dng dao ng th : 1 Tn s f1 = 0,415 Lai a hnh n gi: A Thnh phn ng ca ti trng gi tnh ton theo cng thc: Wp(ij) = Mj * i * i * ij Mj : Khi lng tp trung ca phn t th j i : H s ng lc ng vi dao ng th i, khng th nguyn ij : Chuyn v ngang t i ca trng tm phn cng trnh th j i vi dao ng th I i : H s khng th nguyn

    Xc nh WFj theo cng thc: WFj = Wj * j * * Dj * hj Wj : Ti trng gi tnh j : H s p lc ng ca ti trong gi Dj : B rng n gi tng th j hj : Chiu cao n gi tng th j D = 1,6 (m) Chiu rng cng trnh H = 47 (m) Chiu cao cng trnh = 0,75 H s tng quan khng gian ca ti trng gi. Bng xc nh thnh phn ng WFj

    Cao Wj (Kg/m2) i Dj hj WFj (KG)

    (m) (m) (m)

    1 94,87 0,318 0,750 1,60 1,00 36,202

    2 94,87 0,318 0,750 1,60 1,00 36,202

    3 94,87 0,318 0,750 1,60 1,00 36,202

    4 98,19 0,318 0,750 1,60 1,00 37,469

    5 101,51 0,318 0,750 1,60 1,00 38,736

    6 103,60 0,315 0,750 1,60 1,00 39,160

    7 105,68 0,312 0,750 1,60 1,00 39,568

    8 107,77 0,309 0,750 1,60 1,00 39,962

    9 109,86 0,306 0,750 1,60 1,00 40,340

    10 111,95 0,303 0,750 1,60 1,00 40,703

    11 113,08 0,302 0,750 1,60 1,00 40,927

    12 114,22 0,300 0,750 1,60 1,00 41,147

    13 115,36 0,299 0,750 1,60 1,00 41,364

    14 116,50 0,297 0,750 1,60 1,00 41,576

    15 117,64 0,296 0,750 1,60 1,00 41,785

    16 118,59 0,295 0,750 1,60 1,00 41,923

    17 119,53 0,293 0,750 1,60 1,00 42,057

    18 120,48 0,292 0,750 1,60 1,00 42,189

    19 121,43 0,290 0,750 1,60 1,00 42,317

    n

    j

    jji

    n

    j

    Fjij

    i

    My

    Wy

    1

    2

    1y

  • Page 6

    20 122,38 0,289 0,750 1,60 1,00 42,442

    21 123,14 0,288 0,750 1,60 1,00 42,602

    22 123,90 0,288 0,750 1,60 1,00 42,760

    23 124,66 0,287 0,750 1,60 1,00 42,917

    24 125,42 0,286 0,750 1,60 1,00 43,073

    25 126,18 0,286 0,750 1,60 1,00 43,228

    26 126,93 0,285 0,750 1,60 1,00 43,381

    27 127,69 0,284 0,750 1,60 1,00 43,533

    28 128,45 0,283 0,750 1,60 1,00 43,684

    29 129,21 0,283 0,750 1,60 1,00 43,834

    30 129,97 0,282 0,750 1,60 1,00 43,982

    31 130,54 0,281 0,750 1,60 1,00 44,065

    32 131,11 0,281 0,750 1,60 1,00 44,147

    33 131,68 0,280 0,750 1,60 1,00 44,228

    34 132,25 0,279 0,750 1,60 1,00 44,308

    35 132,82 0,279 0,750 1,60 1,00 44,387

    36 133,39 0,278 0,750 1,60 1,00 44,465

    37 133,96 0,277 0,750 1,60 1,00 44,543

    38 134,52 0,276 0,750 1,60 1,00 44,619

    39 135,09 0,276 0,750 1,60 1,00 44,694

    40 135,66 0,275 0,750 1,60 1,00 44,769

    41 136,04 0,275 0,750 1,60 1,00 44,841

    42 136,42 0,274 0,750 1,60 1,00 44,913

    43 136,80 0,274 0,750 1,60 1,00 44,984

    44 137,18 0,274 0,750 1,60 1,00 45,056

    45 137,56 0,273 0,750 1,60 1,00 45,127

    46 137,94 0,273 0,750 1,60 1,00 45,197

    47 138,32 0,273 0,750 1,60 0,50 22,634

    Bng xc nh thnh phn ng h s i

    Cao Wpj Mj y1j y1j . Wpj y1j2

    . Mj

    (m) n (KG)

    1 36,202 200 0,0012 0,04344 0,00029

    2 36,202 200 0,0044 0,1593 0,0039

    3 36,202 200 0,0095 0,3439 0,0181

    4 37,469 200 0,0163 0,6107 0,0531

    5 38,736 200 0,0249 0,9645 0,1240

    6 39,160 200 0,0352 1,3784 0,2478

    7 39,568 200 0,0471 1,8637 0,4437

  • Page 7

    8 39,962 200 0,0606 2,4217 0,7345

    9 40,340 200 0,0757 3,0537 1,1461

    10 40,703 200 0,0922 3,7528 1,7002

    11 40,927 200 0,1101 4,5061 2,4244

    12 41,147 200 0,1295 5,3286 3,3541

    13 41,364 200 0,1501 6,2087 4,5060

    14 41,576 200 0,1721 7,1553 5,9237

    15 41,785 200 0,1952 8,1564 7,6206

    16 41,923 200 0,2195 9,2020 9,6361

    17 42,057 200 0,245 10,30401 12,00500

    18 42,189 200 0,2715 11,4542 14,7425

    19 42,317 200 0,299 12,6527 17,8802

    20 42,442 200 0,3275 13,8997 21,4513

    21 42,602 200 0,357 15,2087 25,4898

    22 42,760 200 0,3872 16,5567 29,9848

    23 42,917 200 0,4183 17,9523 34,9950

    24 43,073 200 0,4502 19,3915 40,5360

    25 43,228 200 0,4828 20,8704 46,6192

    26 43,381 200 0,516 22,3847 53,2512

    27 43,533 200 0,5499 23,9390 6