采用侧面角焊缝连接时轴心受拉平板剪力滞后效应分析  

Analysis on shear lag effect of axial tension plate with side fillet welding connection

作　　者：罗峥[1] 雷思维[1] 张风亮 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]陕西省建筑科学研究院,西安710082

出　　处：《建筑结构》2014年第9期43-47,共5页Building Structure

摘　　要：在钢结构设计中应考虑轴心受拉平板不完全连接时产生的剪力滞后效应,国外规范对此做出了折减截面面积的相关规定,但是折减程度偏大,直接引入我国规范使用稍显不经济。通过有限元软件ABAQUS对国外相关试验进行了模拟,验证了模型的正确性,并使用该模型分析了焊缝长度、板宽度等参数对剪力滞后的影响,分析了考虑剪力滞后效应和未考虑剪力滞后效应时关键截面应力分布情况。通过通用屈服弯矩法对杆件的恢复力曲线进行处理,得到了杆件屈服荷载,确定了面积折减系数。将有限元计算得到的折减系数和国外规范及征求意见稿进行对比和分析,最后给出了该折减系数的取值建议。In the steel structure design, the shear lag effect should be considered in axial tension plate with incomplete connection. Foreign codes have made relevant provision which is about reduction cross section area, but reduction degree is too large. It is slightly not economic if the foreign code is directly introduced into Chinese code. Through the finite element software ABAQUS, foreign related test was simulated to verify the accuracy of model, and the model was used to analyze the effect of weld length, plate width, etc. on the shear lag. The critical cross section stress distribution was analyzed by considering and not considering the shear lag effect. Through the general yield bending moment method, restoring force curves of member processing were analyzed to obtain the yield load. Then area reduction factor was determined. Compared FEM result with foreign code and Chinese code draft,the suggested values of the reduction coefficients were given.

关 键 词：轴心受拉 剪力滞后 净截面 折减系数 

分 类 号：TU202[建筑科学—建筑设计及理论] TU391