4.双向板的计算
结构图如下:
从左到右从上到下,第一块板是楼梯间,短跨为2400mm的板都按长跨为5000mm算,视作X板
参数:楼面活荷载q=2.0*1.4=2.8kN/m2
楼面恒荷载g=4.3*1.2=5.16kN/m2,g+q=7.76kN/m2 ,g+q/2=6.66kN/m2
A板:
(1)计算跨度l01=2.6m,l02=6.1-0.25=5.85m;l01/l02=0.44,
(2) 弯矩计算:
M1=(0.0400+0.2×0.0038)×6.66×2.6×2.6+(0.0965+0.2×0.0174)×1.3×2.6×2.6=1.780+0.879=2.659KNM
M2=(0.0038+0.2×0.0400)×6.66×2.6×2.6+(0.0174+0.2×0.0965)×1.3×2.6×2.6=0.515+0.323=0.838KNM
M1’=M1’’=-0.0829×7.76×2.6×2.6=-4.349KNM
M2’=m2’’=--0.0570×7.76×2.6×2.6=-2.990KNM
B板:
(1)计算跨度l01=4.2-0.25=3.95m,l02=6.1-0.25=5.85m;l01/l02=0.68,
(2) 弯矩计算:
M1=(0.0333+0.2×0.0105)×6.66×3.95×3.95+(0.0715+0.2×0.0286)×1.3×3.95×3.95=3.57+1.566=5.136KNM
M2=(0.0105+0.2×0.0333)×6.66×3.95×3.95+(0.0286+0.2×0.0715)×1.3×3.95×3.95=4.388+0.651=5.039KNM
M1’=M1’’=-0.0755×7.76×3.95×3.95=-9.141KNM
M2’=m2’’=--0.0570×7.76×3.95×3.95=-6.901KNM
C板:
(1)计算跨度l01=4.8-0.25=4.55m,l02=6.1-0.25=5.85m;l01/l02=0.77
(2) 弯矩计算:
M1=(0.0280+0.2×0.0134)×6.66×4.55×4.55+(0.0602+0.2×0.0324)×1.3×4.55×4.55
=7.467KNM
M2=(0.0134+0.2×0.0280)×6.66×4.55×4.55+(0.0324+0.2×0.0602)×1.3×4.55×4.55=3.737KNM
M1’=M1’’=-0.0684×7.76×4.55×4.55=-10.9881KNM
M2’=m2’’=--0.0560×7.76×4.55×4.55=-8.996KNM
D板:
(1)计算跨度l01=3.8-0.25=3.55m,l02=6.1-0.25=5.85m;l01/l02=0.60
(2) 弯矩计算:
M1=(0.0367+0.2×0.0076)×6.66×3.55×3.55+(0.0820+0.2×0.0242)×1.3×3.55×3.55
=2.639KNM
M2=(0.0076+0.2×0.0367)×6.66×3.55×3.55+(0.0242+0.2×0.0820)×1.3×3.55×3.55=1.881KNM
M1’=M1’’=-0.0793×7.76×3.55×3.55=-7.755KNM
M2’=m2’’=--0.0571×7.76×3.55×3.55=-3.438KNM
E板:
本文来自辣*文,论'文`网,毕业论文 www.751com.cn 加7位QQ324~9114找原文(1)计算跨度l01=3.9-0.25=3.65m,l02=4.3-0.25=4.05m;l01/l02=0.90
(2) 弯矩计算:
M1=(0.0221+0.2×0.0165)×6.66×3.65×3.65+(0.456+0.2×0.358)×1.3×3.65×3.65
=11.323KNM
M2=(0.0165+0.2×0.0221)×6.66×3.65×3.65+(0.358+0.2×0.456)×1.3×3.65×3.65=9.580KNM
M1’=M1’’=-0.0588×7.76×3.65×3.65=-6.078KNM
M2’=m2’’=-0.0541×7.76×3.65×3.65=-5.593KNM
F板
(1)计算跨度l01=3.6-0.25=3.35m,l02=6.35-0.25=6.1m;l01/l02=0.55
(2) 弯矩计算: