取值69636kN/m
开洞面积大于40%按0.6折减: 2 X(3.9-0.5)X0.6=4.07KN/M
取值4.072kN/m
④内墙容重计算
8kN/m3×0.20m + 20 kN/m3×0.04m=2.1 KN/m2 (考虑了双面2cm的抹灰)
⑤层高3.9m内墙梁上荷载计算
未开洞: 2.1X(3.9-0.5)=7.14KN/m
取值7.752kN/m
⑥层高3.9m内墙梁上荷载计算
未开洞: 2.1X(3.9-0.5)=7.14KN/m
取值6.50kN/m
⑧女儿墙梁上荷载计算
200厚女儿墙: 8×0.12=0.96 KN/㎡
取值0.96KN/㎡
1.35m女儿墙: 1.35×0.96= 1.296KN/㎡
取值2.3436KN/㎡
5. 楼板计算
一、基本资料:
1、房间编号: 30
2、边界条件(左端/下端/右端/上端):固定/固定/固定/铰支/
3、荷载:
永久荷载标准值:g = 4.80 kN/m2
可变荷载标准值:q = 2.00 kN/m2
计算跨度 Lx = 6000 mm ;计算跨度 Ly = 2825 mm
板厚 H = 120 mm; 砼强度等级:C30;钢筋强度等级:HPB235
4、计算方法:弹性算法。
5、泊松比:μ=1/5.
6、考虑活荷载不利组合。
二、计算结果:
Mx =(0.00902+0.06103/5)*(1.20* 4.80+1.40* 1.00)* 2.8^2 = 1.21kN•m
考虑活载不利布置跨中X向应增加的弯矩:
Mxa =(0.01565+0.10057/5)*(1.4* 1.00)* 2.8^2 = 0.40kN•m
Mx= 1.21 + 0.40 = 1.61kN•m
Asx= 368.46mm2,实配φ10@200 (As = 393.mm2)
ρmin = 0.307% , ρ = 0.327%
My =(0.06103+0.00902/5)*(1.20* 4.80+1.40* 1.00)* 2.8^2= 3.59kN•m
考虑活载不利布置跨中Y向应增加的弯矩:
Mya =(0.10057+0.01565/5)*(1.4* 1.00)* 2.8^2 = 1.16kN•m
My= 3.59 + 1.16 = 4.75kN•m
Asy= 368.46mm2,实配φ10@200 (As = 393.mm2)
ρmin = 0.307% , ρ = 0.327%
Mx' =0.07790*(1.20* 4.80+1.40* 2.00)* 2.8^2 = 5.32kN•m
Asx'= 368.46mm2,实配φ10@200 (As = 393.mm2,可能与邻跨有关系)
ρmin = 0.307% , ρ = 0.327%
My' =0.11666*(1.20* 4.80+1.40* 2.00)* 2.8^2 = 7.97kN•m
Asy'= 390.69mm2,实配φ10@200 (As = 393.mm2,可能与邻跨有关系)
ρmin = 0.307% , ρ = 0.327%
三、跨中挠度验算:
Mq -------- 按荷载效应的准永久组合计算的弯矩值
(1)、挠度和裂缝验算参数:
Mq =(0.06103+0.00902/5)*(1.0* 4.80+0.5* 2.00 )* 2.8^2 = 2.91kN•m
Es = 210000.N/mm2 Ec = 29791.N/mm2
Ftk = 2.01N/mm2 Fy = 210.N/mm2 高中实验楼结构设计+CAD图纸(5):http://www.youerw.com/gongcheng/lunwen_22282.html