梁翼缘削弱式钢框架考虑节点域剪切变形的力学性能研究  

Study on Mechanical Behavior of Steel Frames with Reduced Beam Flanges Considering Shear Deformation of Panel Zones

作　　者：韩明岚[1] 王燕[1] 董建莉[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《建筑钢结构进展》2013年第1期22-28,共7页Progress in Steel Building Structures

基　　金：国家自然科学基金(51078194);教育部高等学校博士学科点专项基金(20103721110003);山东省自然科学基金联合专项(ZR2012EEL26)

摘　　要：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 frames with reduced beam section (RBS) connections can improve the ductility of structures and meet seismic design requirements.Considering shear force of panel zones,element stiffness matrix of RBS beams and columns are derived,the internal forces and deformations are analyzed and calculated in steel frames with RBS connections by using calculation software MATLAB.The results show that shear forces of panel zones have large effects on deformations of steel frames with RBS connections under horizontal loads,the increments of story drift,inter-story drift and node rotation increase with the number of stories.However,shear forces of panel zones have little effects on internal forces,so the effects of shear forces of the panel zones on lateral stiffness of steel frames should be considered in engineering design.

关 键 词：钢框架 翼缘削弱型节点 节点域 剪切变形 侧向刚度 

分 类 号：TU391[建筑科学—结构工程] TU352.1