1、 工字鋼強(qiáng)度及撓度驗算一、有關(guān)工字鋼計算公式1、一孔梁計算祈栽剪力剪力撓度L反力尺R計寺朮U注：1.在均布荷載作用下：”=表中系數(shù)Xql2；=表中系數(shù)Xql；w=表中系數(shù)x陽100EI3、三孔梁計算亠荷載圖琦內(nèi)躡尢支座膏矩翦力眸度中點撓慶MiMbJvA畑1畑畑W2TJU,：門7TJ0JIEIL|LID,朋03.023-0.100亠（MOO0.400-0,6000,$0k0.5000,60&-0.430.6770.052Q.677注：1.在均布荷載作用下：”=表中系數(shù)Xql2；=表中系數(shù)Xql；w=表中系數(shù)X說二、工字鋼強(qiáng)度及撓度驗算1、工字鋼截面特性參數(shù)Wx截面抵抗矩(cm3)Ix截面慣性矩(

2、cm4)2、強(qiáng)度驗算cr=M/W(N/mm2)計算結(jié)果與f=215N/mm2(鋼材強(qiáng)度設(shè)計值)比較表3,4.11鋼材的強(qiáng)度設(shè)計(N/mm2)銅材抗拉、抗壓和抗呼抗剪AE3t厚度或直徑(mm)0235鋼16-4020512040-6020011560-1001901103、撓度驗算Fmax=撓度公式計算與L/400比較鋼材的彈性模量E=206X103圓管穩(wěn)定性驗算1、查圓管截面特性表查的圓管的回轉(zhuǎn)半徑ix及截面面積A2、確定圓管長度L3、計算圓管長細(xì)比入=L/ix4、查鋼結(jié)構(gòu)設(shè)計規(guī)范表C2,確定圓管折減系數(shù)屮表G2b類截面軸心畳壓構(gòu)件時穩(wěn)逐系數(shù)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、鋼材容許應(yīng)力O=180MPa（軸向力）6、圓管穩(wěn)定條件O=F/AV屮O貝雷梁受力計算1、321貝雷梁特性幾何特性結(jié)構(gòu)構(gòu)造W(cm3)J(cm4)單排單層不加強(qiáng)3578.5250497.2加強(qiáng)17699.1577434.4雙排單層不加強(qiáng)7157.1500994.4加強(qiáng)15398.31154868.8三排單層不加強(qiáng)10735.6751491.6加強(qiáng)23097.41732303.2雙排雙層不加強(qiáng)14817.92148588.8加強(qiáng)30641.74596255.2三排雙層不加強(qiáng)22226.83222883.2加強(qiáng)45962.66894382.8貝雷梁結(jié)構(gòu)特性I不加卿軸彈層雙釋層三釋層雙排雙層三排雙層彎矩T.M78.82157.64224.644653246532剪力丁24.5249.0569.8949.0569.89加強(qiáng)型軸洋層雙牌層三牌層雙排雙層三排雙層彎矩T.M168.75337.5480.94675961.88剪力丁24.5249.0569.8949.0569