【精品文档】风荷载计算规律及公式

1、第二部分风荷载计算一：风荷载作用下框架的弯矩计算风荷载标准值计算公式：W=卩卩卩wkzsz0其中W为垂直于建筑物单位面积上的风荷载标准值k卩为z高度上的风振系数，取卩=1.00TOC o 1-5 h zzz卩为z高度处的风压高度变化系数z卩为风荷载体型系数，取卩二1.30ssw为攀枝花基本风压，取w二0.4000该多层办公楼建筑物属于C类，位于密集建筑群的攀枝花市区。确定各系数数值因结构高度H二19.8m30m，高宽比%=19.%44=1-3751.5，应采用风振系数卩来考虑风压脉动的影响。该建筑物结构平面为矩形，卩二1.30，由建筑结构荷载zs规范第3.7查表得卩二0.8(迎风面)卩=-0.

2、5(背风面)，风压高度变化系数卩可根ssz层数H(m)iBq(z)KN/m1q(z)KN/m27女儿墙底部17.50.791.002.3701.480616.50.771.002.3061.441513.20.741.002.2161.38549.90.741.002.2161.38536.60.741.002.2161.38523.30.741.002.2161.3851-3.30.000.000.0000.000据各楼层标高处的高度确定，由表4-4查得标准高度处的卩值，再用线性插值法求得所求z各楼层高度的卩值。z风荷载计算(3)计算各楼层标高处的风荷载q。攀枝花基本风压取w二0.40KN/

3、mm2,取轴横z0向框架梁，其负荷宽度为7.2m,由W二卩卩卩-w得沿房屋高度分布风荷载标准值。kzsz0TOC o 1-5 h zq二7.2X0.4卩卩卩二2.88卩卩卩，根据各楼层标高处的高度H，查得卩代入上式，可zzszzsziz得各楼层标高处的q(z)见表。其中q(z)为迎风面，q(z)背风面。12风正压力计算：7.q(z)二2.88Bpp二2.88x1.00 x1.30 x0.79x0.8二2.370KN/m1zsz6.q(z)二2.88Bpp二2.88x1.00 x1.30 x0.77x0.8二2.306KN/m1zsz5.q(z)二2.88Bpp二2.88x1.00 x1.30

4、x0.74x0.8二2.216KN/m1zsz4.q(z)二2.88二2.88x1.00 x1.30 x0.74x0.8二2.216KN/m2.q(z)二2.88Bpp二2.88xl.00 xl.3Ox0.74x0.5二1.385KN/m2zsz1.q(z)=2.88P卩卩=2.88x0.00 x1.30 x0.74x0.5=0.000KN/m2zsz(4)将分布风荷载转化为节点荷载第六层：即屋面处的集中荷载F要考虑女儿墙的影响62.306+2.2163.32.370+2.3061.441+1.3853.31.441+1.480.(+221.385+1.3851.385+1.38512+21.

5、385+1.3851.385+1.38512十22x3.3=11.88KNx3.3=11.88KNEM.3851.385+1.385x3.3=12.00KNF=0.5()+2.306x+x1+0.5()+1.441x+x1=9.92KN622222-第五层的集中荷载F的计算过程52.216+2.2162.306+2.216.22厂052.216+2.216,2.16+2.21605/F=0.5+x3.3+0.5(4222216+2216+2x3.3+0.5(F5=0.5+xF=0.5322第二层，要考虑层高的不同：33425F=2.216+1.385x(+)=13.59KN222F=0.00K

6、N19.92、12.00、11.88*11.88*n13.59.ABC等效节点集中等荷载（单位：KN）.柱侧移刚度及剪力的计算柱HI柱NO柱TU-20.42+20.42,心k=1.2942X15.78厂20.42x2+28.58x2k-3.1052x15.75k3.105门一”k-28.58X2-1.8112X15.78k1.811八工D-24.34x-26.821123.32k1294a0674a一一一0475第a-0393c1.5+k1.5+3.105c2+k2+】811c2+1.294六2+k12rc人,12层D-0.674X15.78xD-0.475X15.78xD-0.393x15.

7、78x123.323.323.3212r12-10.64x7.50 x-6.20 x123.323.323.3210647.50V-9.92x-4.52KNV-9.92x3.06KNV-9.92x6.20-2.53KNi624.34i624.34i624.34柱GH柱MN柱ST厂20.42+20.42厂20.42x2+28.58x2厂28.58+28.5812k1294k3105k-1.623八一乂Ay2X15.78k2.294门“c2X15.75k3.105门“c2X15.75k1.623_._-25.1903.32a0393a0608a0448UkJ.11O第c2+k2+2.294c2+k

8、2+3.105c2+k2+1.623五121212层D-0.393X15.78xD-0.608x15.78xD-0.448X15.78x3.323.323.32/“12c“12c12-6.20 x-9.59x-7.07x3.323.323.32V-(9.92+12.00)X.-5.95KN959V-(9.92+12.00)x-9.20KN707V-(9.92+12.00)x-6.78KNi522.86i522.86i522.86柱FG柱LM柱RS厂20.42+20.42厂20.42x2+28.58x2厂28.58+28.58V12k-1.294k-3.105k-1.623乙D22.86x2X1

9、5.782X15.752X15.753.32-25190k2.294门“ck3.105门“ck1.623_._a-0.393a-0.608a-0.448第c2+k2+2.294c2+k2+3.105c2+k2+1.623四121212层D-0.393X15.78xD-0.608X15.78xD-0.448X15.78x层3.323.323.32/“12c“12c12-6.20 x-9.59x-7.07x3.323.323.32f：今V-(9.92+12.00+11.88)x.959V-(9.92+12.00+11.88)x707V-(9.92+12.00+11.88)x-i422.86i422

10、.86i422.86-9.17KN-14.18KN-10.45KN柱EF柱KL柱QR厂20.4N20.42厂20.42x2+28.58x2心“厂28.58+28.58V12k-0.884k-2.12k-1.237VD27.82x2x23.112x23.112x23.113.32-30.656k0.884小“Ik2.12_._k1.237小_少_-n2CT7a0、|、a-一-0382VA,JQJLJLa,V7.30第c2+k2+0.884c2+k2+2.12c2+k2+1.237层D-0.30723.1X12D-0.515x23.11X12D-0.382x23.11X123.33.323.32-

11、7.09X12-11.90 x12-8.83x123.33.323.32V-(9.92+12.00+11.88+11X809959V-(9.92+12.00+11.88)x883V-(9.92+12.00+11.88+11.88)x-i327.82i327.82i327.82-11.64KN-19.55KN-14.50KN柱DE柱JK柱PQ20.4N20.42w厂20.42x2+28.58x2小“28.58+28.58V12k-0.884k2.12k-1.237乙D27.82x2x23.112x23.112x23.113.32-30656k0.884八“rk212k1.237门_a-0.307

12、a-&-0.515a-0.382c2+k2+0.884c2+k2+2.12c2+k2+1.237第121212二D-0.307x23.1XD-0.515x23.11xD-0.382x23.11x层3.33.323.32rcc1212ccc127.09x-11.90 x8.83x3負3.323.32V-(9.92+12.00+11.X2+13.59)i2V-(9.92+12.00+11.88x2+13.59)V-(9.92+12.00+11.88x2+13.59)i4709i39598.83x-15.10KNx-25.36KNx-18.81KN27.8227.8227.82柱AD柱BK柱CP厂2

13、0.42ccc”20.42+28.58厂28.58Vcccc12k-0.884k2.12k-1.237VD38.89x23.1123.1123.113.320.5+k0.5+0.884n.onk0.5+2.12小0.5+k0.5+1.237M,-42.854a-0.480a-0.636a-0.567第c2+k2+0.884c2+k2+2.12c2+k2+1.237一c121212层D-0.48CX23.1XD-0.636x23.11xD-0.567x23.11x3.33.323.32CC1212c12-11.09-14.70 x13.10 x3.33.323.32V-(9.92+12.00+1

14、1.X2+13.59)i2V-(9.92+12.00+11.88x2+13.59)V-(9.92+12.00+11.88x2+13.59)i41370 x3.0-19.96KNx11.09-16.90KNx-22.40KN38.8938.8938.89三：各层柱反弯点和弯矩柱HI柱NO柱TUM(KN.m)第六层k=1.294y=0.3650a=1y=011a=1y=033y=y+y+yy=0.36500123y=yh=0.365x3.3=1.20k=3.105y=0.450a=1y=011a=1y=033y=y+y+yy=0.4500123y=yh=0.45x3.3=1.485k=1.811y

15、=0.40a=1y=011a=1y=033y=y+y+yy=0.40012丿3y=yh=0.4x3.3=1.32M=2.53x(3.30-1.20)=5.31左边上M=2.53x1.20=3.04左边下M=4.52x(3.30-1.485)=8.20中上M=4.52x1.485=6.71中下M=3.06x(3.30-1.32)=6.06右边上M=3.06x1.32=4.04右边下第五层柱GH柱MN柱STk=1.294y=0.420a=1y=011a=1y=022a=1y=033y=y+y+yy=0.4200123y=yh=0.42x3.3=1.386k=3.105y=0.450a=1y=011

16、a=1y=022a=1y=033y=y+y+yy=0.4500123y=yh=0.45x3.3=1.485k=1.623y=0.430a=1y=011a=1y=022a=1y=033y=y+y+yy=0.4300123y=yh=0.43x3.3=1.419M=5.95x(3.30-1.386)=11.39左边上M=5.95x1.386=8.25左边下M=9.20 x(3.30-1.485)=16.7中上M=9.20 x1.485=13.66中下M=6.78x(3.30-1.419)=12.75右边上M=6.78x1.419=9.62右边下柱FG柱LM柱RS第四层k=1.294y=0.450a=

17、1y=011a=1y=022a=1y=033y=y+y+yy=0.4500123y=yh=0.45x3.3=1.485k=3.105y=0.50a=1y=011a=1y=022a=1y=033y=y+y+yy=0.500123y=yh=0.5x3.3=1.65k=1.623y=0.450a=1y=011a=1y=022a=1y=033y=y+y+yy=0.4500123y=yh=0.45x3.3=1.485M=9.17x(3.30-1.485)=16.64左边上M=9.17x1.485=13.62左边下M=14.18x(3.30-1.65)=23.40中上M=14.18x1.65=23.40中

18、下M=10.45x(3.30-1.485)=18.97右边上M=10.45x1.485=15.52右边下第层柱EF柱KL柱QRk=0.884y=0.450a=1y=0ia=1y=02a=1y=033y=y+y+yy=0.4500123y=yh=0.45x3.3=1.485k=2.12y=0.50a=1y=011a=1y=022a=1y=033y=y+y+yy=0.4500123y=yh=0.5x3.3=1.65k=1.237y=0.460a=1y=011a=1y=022a=1y=033y=y+y+yy=0.4600123y=yh=0.46x3.3=1.518M=11.64x(3.30-1.48

19、5)=21.13左边上M=11.64x1.485=17.29左边下M=19.55x(3.30-1.65)=32.26中上M=14.18x1.65=32.26中下M=14.50 x(3.30-1.518)=25.84右边上M=14.5x1.518=22.01右边下柱DE柱JK柱PQ第层k=0.884y=0.50a=1y=011a=1y=022a=1y=033y=y+y+yy=0.500123y=yh=0.5x3.3=1.65k=2.12y=0.50a=1y=011a=1y=022a=1y=033y=y+y+yy=0.4500123y=yh=0.5x3.3=1.65k=1.237y=0.50a=1y=011a=1y=022a=1y=033y=y+y+yy=0.500123y=yh=0.5x3.3=1.65M=15.10 x(3.30-1.65)=24.92左边上M=15.10 x1.65=24.92左边下M=25.36x(3.30-1.65)=50.59中上M=25.36x1.65=50.59中下M=18.81x(3.30-1.518)=33.52右边上M=18.81x1.518=28.55右边下第层柱AD柱BK柱CPk=0.884y=0.650a=1y=