工字钢、圆管及贝雷梁强度及挠度验算

1、 工字钢强度及挠度验算一、有关工字钢计算公式1、一孔梁计算祈栽剪力剪力挠度L反力尺R计寺朮U注：1.在均布荷载作用下：”=表中系数Xql2；=表中系数Xql；w=表中系数x阳100EI3、三孔梁计算亠荷載图琦内蹑尢支座膏矩翦力眸度中点挠慶MiMbJvA畑1畑畑W2TJU,：门7TJ0JIEIL|LID,朋03.023-0.100亠（MOO0.400-0,6000,$0k0.5000,60&-0.430.6770.052Q.677注：1.在均布荷载作用下：”=表中系数Xql2；=表中系数Xql；w=表中系数X说二、工字钢强度及挠度验算1、工字钢截面特性参数Wx截面抵抗矩(cm3)Ix截面惯性矩(

2、cm4)2、强度验算cr=M/W(N/mm2)计算结果与f=215N/mm2(钢材强度设计值)比较表3,4.11钢材的强度设计(N/mm2)铜材抗拉、抗压和抗呼抗剪AE3t厚度或直径(mm)0235钢16-4020512040-6020011560-1001901103、挠度验算Fmax=挠度公式计算与L/400比较钢材的弹性模量E=206X103圆管稳定性验算1、查圆管截面特性表查的圆管的回转半径ix及截面面积A2、确定圆管长度L3、计算圆管长细比入=L/ix4、查钢结构设计规范表C2,确定圆管折减系数屮表G2b类截面轴心畳压构件时稳逐系数攀01!23t5678f)0L（H）okDGOL00

3、00+999(h9990.998a9S70.996Q.9950.994100.992099169830+9870,9850.983a98i0.9780,9760.9732D0.9700,9670.9630+9600.9570+953DO0.9460.9曲0.939300,93669320.929492569220.918:a9ii9.9100.9060.&03M)Ci.8990.8950,8910.8870,&820t878G8740.S70(：,8fi50.S615(J0.8560t8520.8470.8420.838Q.83368280.8230.8180.8136o(.8070.8020

4、*7970.7910.7860,7800,7740,769(X763(.757700*7510.74S&7390.7320.7260.7200t7l40.707U.701(k694800*6880.6810.6750.6680,6610.655Q.648O+6410.635Oh62E900.621(X6140.6080.6010.5940.5880.5810.S750.5680.5611000.5550.U49Q*5420,536乩5290.5230*5170*5110.505A499no0.4930,4870.481OM750.4700,4640t4580530.4470.442uo0,43

5、70+4320.4260M21o.m0*4110.4060.4020.3970.392rio3870*3330F378i0.3740.3700.3650.3610,3576353(;.349MO0,3450.3410.3370.3330,3290.3260,3220.318315o.m5、钢材容许应力O=180MPa（轴向力）6、圆管稳定条件O=F/AV屮O贝雷梁受力计算1、321贝雷梁特性几何特性结构构造W(cm3)J(cm4)单排单层不加强3578.5250497.2加强17699.1577434.4双排单层不加强7157.1500994.4加强15398.31154868.8三排单层不加强10735.6751491.6加强23097.41732303.2双排双层不加强14817.92148588.8加强30641.74596255.2三排双层不加强22226.83222883.2加强45962.66894382.8贝雷梁结构特性I不加卿軸弹层双释层三释层双排双层三排双层弯矩T.M78.82157.64224.644653246532剪力丁24.5249.0569.8949.0569.89加强型軸洋层双牌层三牌层双排双层三排双层弯矩T.M168.75337.5480.94675961.88剪力丁24.5249.0569.8949.0569