7 风荷载内力计算.docx

七风荷载内力计算基本风压wo=O.4kNm2,地面粗糙度为B类。本章计算以左风为例。（一）风荷载计算Wk=zszWo,建筑物高度3Om,故z=1.0迎风时s=÷0.8,背风时s2=-0.5,则s=0.8+0.5=1.3计算过程见下表楼层高度H（m）出五19.21.23四15.61.15三12.01.06二8.41.04.81.0WkA(m2)P(kN)0.6421.8413.980.628.0816.850.5528.0815.440.5228.0814.600.5232.7617.04计算简图（单位：kN）13.98>16.85>15.44>14.60>17.04>ZZZ/ZZZ72007200（二）内力计算1 .抗侧刚度和反弯点高度确定计算过程见下表楼层KD(104kNm)yoIy。2Y2a?3yhh-yh边柱五1.190.373.080.3610101.302.30四1.190.373.080.411010101.482.12三1.190.373.080.461010101.661.94二1.190.373.080.501010101.801.801.270.541.940.6200.6803.292.01中柱五2.390.544.50.4210101.512.09四2.390.544.50.451010101.621.98三2.390.544.50.501010101.801.80二2.390.544.50.501010101.801.80一2.550.672.410.5500.6802.922.382 .剪力在各层分配（单位：kN）Vp5=I3.98V5=2.84V5=4.15Vp4=30.83V4=6.27V4=9.15Vp3=46.27V3=9.41V3=13.73Vp2=60.87V2=I2.38V2=I8.06Vpi=77.91V=17.39V=21.573 .柱端弯矩计算（单位：kNm）6.538.673.696.2713.2919.129.2814.8218.2624.7115.6224.7122.2832.5122.2832.5134.9551.3457.2162.984 .风荷载作用下的内力图M图（单位：kNm）1.512.912.844.151.41.516.274.119.438515.85.629.416.5513.7313.2512.512.1712.389.2218.0622.4619.1821.3917.3913.7421.5736.8328.1135.13/VN5 V,N图（单位：kN）6 .梁端柱边弯矩（单位：kNm）6.083.863.4915.7511.3910.2225.5717.6815.9035.1425.6923.0252.7637.2233.03