0
1.7 1 (0.0234+0.2×0.0234) ×6.752×1.72+(0.0368+0.2×0.0368) ×1.4×1.72=0.727
-0.0677×8.152×1.72=-1.959
0
1.7 1 (0.0227+0.2×0.0168) ×6.752×1.72+(0.0368+0.2×0.0368) ×1.4×1.72=0.687 (0.0168+0.2×0.0227) ×6.752×1.72+(0.0368+0.2×0.0368) ×1.4×1.72=0.595
-0.06×8.152× 1.72=-1.414
0
-0.055×8.152× 1.72=-1.296
-1.296
表4.1 二层楼盖弯矩值计算表(续表)
板 l01 (m) l02 (m) l01/ l02 (kN•m)
2.25 0.8 (0.0351+0.2×0.0103) ×5.732×1.82+(0.0561+0.2×0.0334) ×1.4×1.82=0.975 (0.0103+0.2×0.0351) ×5.732×1.82+(0.0334+0.2×0.0561) ×1.4×1.82=0.524
-0.0782×7.132×1.82=-1.807
4.5 0.7 (0.0485+0.2×0.0148) ×5.732×3.152+(0.0683+0.2×0.0296) ×1.4×3.152=3.958 (0.0148+0.2×0.0485) ×5.732×3.152+(0.0296+0.2×0.0683)×1.4×3.152=1.994
-0.1087×7.132×3.152=-7.692
4.5 0.7 (0.0379+0.2×0.0072) ×5.732×3.152+(0.0683+0.2×0.0296) ×1.4×3.152=3.269 (0.0072+0.2×0.0379) ×5.732×3.152+(0.0296+0.2×0.0683)×1.4×3.152=1.442
-0.0814×7.132
×3.152=-5.760
-5.760
3)截面设计:
材料:C30混凝土, 8钢筋,
截面有效高度:
方向跨中截面的 方向跨中截面的
支座截面的
最小配筋率:
因为 ,故取ρsmin=0.306%,则Asmin=0.306%×1000×100=306mm2
截面设计时取用的弯矩设计值:
不考虑板的穹顶作用,弯矩设计值不折减,作为安全储备。为了便于计算,近似取γ=0.95,
计算过程见表4.2和表4.3。
表4.2 二层楼板配筋计算表(跨中截面)
跨中截面 h0
(mm) m
(kN•m) As
(mm2) 配筋 实用As
(mm2)
B1 方向
81 3.494 216.22 8@160
314
方向
73 2.738 188.00 8@160
314
B2 方向
81 2.982 184.54 8@160
314
方向
73 2.130 146.26 8@160
314
B3 方向
81 0.727 44.99 8@160
314
方向
73 0.727 49.92 8@160
314
B4 方向
81 0.687 42.51 8@160
314
方向
73 0.595 40.86 8@160
314
B5 方向
81 0.975 60.34 8@160 经济型宾馆五层大楼设计(5):http://www.751com.cn/gongcheng/lunwen_8564.html