矩形钢管混凝土树状节点受力分析  

Behavior of dendriform connections of concrete filled steel rectangular tubes

作　　者：刘东[1] 甘正立[1] 赵仕兴[2] 李正良[1] 

机构地区：[1]重庆大学土木工程学院,重庆400030 [2]四川省建筑设计研究院,成都610017

出　　处：《重庆大学学报（自然科学版）》2009年第1期50-54,共5页Journal of Chongqing University

基　　金：国家重大基础研究前期研究专项基金资助项目(2003CCA01500)

摘　　要：钢管混凝土树状节点是由钢管混凝土Y形柱与双十字形梁柱节点组合而成的复杂节点。采用ANSYS对该类节点进行非线性有限元计算分析,计算模型考虑材料,几何和接触非线性。梁端荷载位移曲线以及滞回曲线与试验吻合较好,并能准确模拟出节点的破坏形态。分析有限元计算结果表明:梁端加劲肋使拉压应力能有效传递到内隔板,中间孔洞的存在对内隔板的传力影响较小,反复荷载作用下节点核心区混凝土对角区受压,对梁端压应力的传递有较大贡献。Dendriform connections of concrete filled steel rectangular tubes （CFSRT） are composed of a bifurcated column and double cruciform beam-column connections. A 3-D nonlinear finite element analysis （FEA） which considers all nonlinear effects of materials, geometry and contact interfaces is established. Analysis of the FEA results show that the load-displacement curves at the ends of the beam and hysteretic curves obtained experimentally and via FEA agreed with each other. The stiffener transfers the tensioncompression stress efficiently, the middle hole has little influence on the stress transfer, and the compressive zone of the core concrete under repeated loading has a greater contribution to the compression stress transfer.

关 键 词：钢管混凝土 树状节点 Y形柱 非线性有限元分析 滞回环 

分 类 号：TU528.59[建筑科学—建筑技术科学]