桁架内力计算与截面选择

1、杆件名称杆件编号内力系数杆件内力计算内力半跨(左)半跨(右)全跨()组合一 (Fx)组合二组合三(F1x +F2x )(F1x +F2x )(F3x + F4x)(F3x + F4x)上弦杆AB000000000BC-6.25-2.47-8.72-667.34-620.26-548.22-236.78-124.32-667.34CD-6.25-2.47-8.72-667.34-620.26-548.22-236.78-124.32-667.34DE-9.04-4.49-13.53-1035.45-949.87-863.15-347.82-212.46-1035.45EF-9.04-4.49-1

2、3.53-1035.45-949.87-863.15-347.82-212.46-1035.45FG-9.17-6.09-15.26-1167.85-1051.77-993.07-361.77-270.14-1167.85GH-9.17-6.09-15.26-1167.85-1051.77-993.07-361.77-270.14-1167.85HI-7.38-7.38-14.71-1125.76-988.92-988.92-305.61-305.61-1125.76下弦杆ac3.481.254.73361.99338.16295.66131.1164.76361.99ce83.5311.53

3、882.39815.11729.91305.22172.24882.39eg9.345.3114.651121.161019.96943.14363.27243.381121.16gi8.446.7315.171160.961032.691000.09339.53288.661160.96斜腹杆aB-6.53-2.34-8.87-678.82-634.22-554.36-245.98-121.33-678.82Bc4.762.126.88526.53486.12435.80181.72103.18526.53cD-3.14-2.3-5.44-416.32-372.49-356.47-125.1

4、3-100.14-416.32De1.91.83.7283.16248.85246.9578.1075.12283.16eF-0.71-1.75-2.46-188.26-154.91-174.73-35.46-66.40-188.26Fg-0.451.561.1184.9555.2193.53-6.9252.8893.53gH1.55-1.530.021.5330.69-28.0146.23-45.40-45.40HI-2.471.39-1.08-82.65-109.15-35.57-79.7835.06-109.15竖杆Aa-0.50-0.5-38.27-38.27-28.74-17.79-

5、2.92-38.27Cc-10-1-76.53-76.53-57.47-35.58-5.83-76.53Ee-10-1-76.53-76.53-57.47-35.58-5.83-76.53Gg-10-1-76.53-76.53-57.47-35.58-5.83li0.970.971.94148.47129.98129.9840.1740.17-76.53148.47杆件杆件内力值计算长度(mm)截面截面积回转半径长细比容许长细比稳定计算应力填板名称编号(kN)l oxl0y规格(cm2)ixiy入x入yA系数(N/mm2 )数量上弦杆Ff-1167.851507.03000.02l180 x1

6、10 x1267.423.18.648.6134.881500.823210.51下弦杆gi1160.963000.014850.02l160 x100 x1050.632.857.63105.26194.633501229.32斜腹杆aB-678.822530.02530.02l140 x90 x1044.524.473.5956.6070.471500.698218.42Bc526.532090.42613.02l125x80 x831.984.023.1852.0082.173501164.62cD-416.322291.22864.02l125x80 x831.984.023.1857

7、.0090.061500.621209.63De283.162291.22864.02l75x514.822.323.3698.7685.243501191.12eF-188.262499.23124.02l75x514.822.323.36107.7292.981500.511248.63Fg93.532499.23124.02l63x512.281.942.89128.82108.10150176.22gH-45.402712.03390.02l63x512.281.942.89139.79117.301500.345107.23HI-109.152712.03390.02l63x512.281.942.89139.79117.303500.345257.63竖杆Aa-38.271840.82301.02l63x512.281.942.8994.8979.623500.59452.52Cc-76.531666.42083.02l63x512.281.942.8985.9072.083500.66194.32Ee-76.531840.82301.02l63x512.281.942.8994.8979.623500.594104.92Gg-76.531592