型钢截面:H300X300X10X15所以:A=11700mm材质:Q345l0x=mml0y=mmIx=Iy=Wx=Wy=ix=mmiy=mmλx=λy=≤99.0φb=0.95Mx=KN·mMy=KN·m1.051.2所以按双轴对称简化计算:31031019659强度验算:264.0稳定验算:249.7≤fy=≤fy=130.5275.9745.976000450059.231993275006752500013288504501674mm4mm3mm3mmnyyynxxxwMwMxy2/mmNyyyxbxWMWM2/mmN2/mmN2/mmN2/mmN2/mmN49029340X18所以:A=31649mm材质:Q235l0x=mml0y=mm形心距上翼缘mmIx=Iy=I1y=I2y=W1x=W1y=W2x=W2y=ix=mmiy=mmλx=λy=≤120.0αb=φb=1.00Mx=KN·mMy=KN·m1.051.050.83(注:上翼缘为受压)X1428431841758956000x0=312.8型钢截面:H855.5X69559532020412345.36104.1817.376000600057.603774936815343470041120678841401919强度验算:157.4稳定验算:155.5所以按单轴对称简化计算:205205476.6173.5≤fy=≤fy=4mm4mm3mmnyyynxxxwMwMxy2/mmNyyyxbxWMWM2/mmN2/mmN2/mmN4mm4mm3mm3mm3mm2/mmN2/mmN