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钢框架采用翼缘削弱型节点(RBS)可以提高结构延性,满足结构抗震设计要求。考虑框架节点域的剪切变形,导出连带节点域的RBS梁、柱单元刚度矩阵,利用计算软件MATLAB对RBS节点钢框架结构的内力及变形进行了分析和计算。分析结果表明:在水平荷载作用下节点域剪切变形对RBS节点钢框架变形影响较大,层位移、层间位移以及节点总转角的增量均随层数的增加而相应增大,节点域剪切变形对框架内力的影响较小;工程设计中应考虑节点域剪切变形对RBS节点钢框架侧向刚度的不利影响。
Steel frame with flange weakening node (RBS) can improve the structural ductility, to meet the structural seismic design requirements. Considering the shear deformation of frame node domain, the RBS beam and column element stiffness matrix of joint node domain are deduced. The internal force and deformation of RBS node steel frame structure are analyzed and calculated by MATLAB. The analysis results show that the shear deformation of the joint region under horizontal load has a great influence on the deformation of the RBS node steel frame. The increment of the layer displacement, the interlayer displacement and the total turning angle of the node increase with the increase of the number of layers. The influence of shear deformation on the internal force of the frame is small. The lateral stiffness of the RBS node steel frame should be considered in engineering design considering the shear deformation of the joint.