钢结构第3章作业参考答案VIP免费

《钢结构》(第三版)戴国欣主编钢结构第3章作业参考答案3.1试设计双角钢与节点板的角焊接连接。钢材为Q235B，焊条为E43型，手工焊，轴心力N=1000KN（设计值），分别采用三面围焊和两面侧焊进行设计。mmhmmhmmhfff82.5125.112102.1minmax假定(1)采用三面围焊时，KNflhNwffwe3.27316022.112587.02233mmlw29816087.021035.53331KNNNaN35.53323.273100067.02131解：)(40648)(48060满足且满足mmmmhmmhffmmlmm，lmmlmml120310116810830882982121肢尖取肢背；KNNNaN35.19323.273100033.02322mmlw10816087.021035.19332＝)(40648)(48060满足且满足mmmmhmmhff(2)当采用二面侧焊时KNNaNKNNaN330100033.0670100067.02211mmfhNlwfew18416087.02103302322mmfhNlwfew37416087.02106702311)(40648)(48060满足且满足mmmmhmmhff)(40648)(48060满足且满足mmmmhmmhffmmlmm，lmmlmml20039020082184390823742121肢尖取肢背；）肢尖（对比三面围焊：肢背mmlmm，l120310213.2试求图所示连接的最大设计荷载。钢材为Q235B，焊条为E43型，手工焊，角焊缝焊脚尺寸hf=8mm,e1=30cm。解：mmx4250020522205205250087.020587.02050087.0220587.0205204423242369.2232139.21385.6020587.01220587.024250087.03.2018325020587.021250087.0cmIIIcmIcmIyxpyxFeeFTmme463)300163(16342205212＝＝－MpafwffTxVyTy16022PITTx250PIT，Ty163509687.0910FFlhFweVy22216016322.15096250PPITFIT即22216016346322.15096250463PPIFFIF222221607546922.150961115750PPIFIF2227546922.15096122.111570160PPIIFKNF53.2361069.223217546922.1509611069.2232122.11157016024242即，最大设计荷载F=236.53KN3.3试设计如图3.82所示牛腿与柱的连接角焊缝、、。钢材为Q235B，焊条为E43型，手工焊。解：查表得Mpafwt160假设焊缝mmhf8KN，FV98mKNM76.1112.098计算形心轴位置和惯性矩mmxo5.1446.520026.51386.51501006.520022006.51382126.5150＋4232218111045.142056.02122056.0245.142008.1356.045.142.211556.0cmI）－（）－（）－（mmhe6.587.0按剪力由腹板承担，弯矩由腹板和翼缘共同承担考虑MpaMpalhVwe16075.432006.5210983翼缘上边的拉应力：MpaMpaxIMf16085.4352.671018111076.1146上上腹板下口的压应力：MpaMpaxIMof16082.9348.1441018111076.1146下MpaMpaff1603.10475.430.182.932222满足要求mmhf8）然后再根据构造选取求得（注：本题也可以计算ffhh,Mpa，fwc2153.4习题3.3的连接中，如将焊缝及焊缝改为对接焊缝（按三级质量标准检验），试求该连接的最大荷载。解：若为对接焊缝，则：Mpa，fwt185Mpa，fwv125设能承受的最大集中荷载为F，VMFV12.0,mmxo43.14512200121501001220020612150形心42327.19552/2054.14202.112202.153.146.202.115cmI）（）－（当受剪时，最大剪力MpafFtISVwvx125257.541257.54)43.145206(1501212107.19554maxKNF19.231解得当在翼缘上口受拉时，KNFMpafFxIMwt9.45218557.66107.19551012.0431max解得拉当在腹板下...