ploča
DESCRIPTION
Proracun momenata u plociTRANSCRIPT
![Page 1: Ploča](https://reader036.vdocuments.site/reader036/viewer/2022082409/5695d1271a28ab9b02955cd6/html5/thumbnails/1.jpg)
Ploča je tipa 2a
d=20,0 cm
p = 20 kN/m2
Prvi način: TOWER
0 50 100 150 200 2500
10
20
30
40
50
60
70
80
90
mx uklještenje
mx sredina
mxy desno
my uklještenje
my sredina
Iz programa TOWER za n=165 čvorova:
Prikaz momenta mx
![Page 2: Ploča](https://reader036.vdocuments.site/reader036/viewer/2022082409/5695d1271a28ab9b02955cd6/html5/thumbnails/2.jpg)
Prikaz momenta my:
Prikaz momenta mxy:
![Page 3: Ploča](https://reader036.vdocuments.site/reader036/viewer/2022082409/5695d1271a28ab9b02955cd6/html5/thumbnails/3.jpg)
Drugi način: Približni proračun sa gredama pod uglom od 900
a) Jedna greda momenat mx
b) Dvije grede u y pravcu:
![Page 4: Ploča](https://reader036.vdocuments.site/reader036/viewer/2022082409/5695d1271a28ab9b02955cd6/html5/thumbnails/4.jpg)
c) Roštilj uticaji u srednjoj gredi
Treći način: Proračun ploče preko pripadajućih površina:
q1= 20 7 = 140 kN/m'∙
q1= 20 3,34 = 66,8 kN/m'∙
q3= 20 7 = 140 kN/m'∙
![Page 5: Ploča](https://reader036.vdocuments.site/reader036/viewer/2022082409/5695d1271a28ab9b02955cd6/html5/thumbnails/5.jpg)
Dijagram momenata:
Prave vrijednosti momenata:
muklještenja = 299,29/7 = 42,76 kNm
mSredina = 154,42/7 = 22,06 kNm
![Page 6: Ploča](https://reader036.vdocuments.site/reader036/viewer/2022082409/5695d1271a28ab9b02955cd6/html5/thumbnails/6.jpg)
Četvrti način: Preko tablica
mfx=q ∙l x
2 ∙ f x100
=20 ∙52 ∙4,76100
=23,8kNm
mfy=q ∙ lx
2 ∙ f y100
=20 ∙52∙1,83100
=9,15kNm
−mSx=q ∙ lx
2∙ Sx100
=20 ∙52 ∙10,78100
=53,9kNm
Raspodjela momenata u ploči:
ɛ fx fy Sx1,4 4,76 1,83 10,78