摘要
为了研究钢管混凝土组合框架梁柱半刚性连接的受力性能与破坏形式,本文采用ABAQUS软件建立了钢管混凝土柱与钢-混凝土组合梁端板连接的非线性有限元模型。该模型考虑了材料非线性、几何非线性和复杂接触问题,确定了钢管核心混凝土和楼板混凝土的本构关系模型、各组件的复杂接触关系。研究了组合节点的柱端水平荷载-水平位移关系曲线和破坏形式,并用试验结果验证了计算结果的准确性。进行了大量的参数分析,获得了在正、负弯矩作用下影响组合节点极限承载力和初始刚度的主要参数。研究结果表明:所建立的钢管混凝土柱与钢-混凝土组合梁端板连接的有限元模型具有较好的准确性,可以为半刚性钢管混凝土组合框架的理论研究提供参考依据。
To study the mechanical behavior and failure mode of semi--rigid beam-to-column connections for concrete filled steel tube （CFST） frames, a nonlinear finite element （FE） model is established for the end plate connections between CFST columns and steel-concrete composite beams using ABAQUS software. This FE model accounts for material nonlinearity, geometric nonlinearity and complex contact properties. The constitutive model of core concrete in steel tube and slab concrete, and complex contact relations of components are proposed. The horizontal load-displacement curve of the column and the failure mode of composite joints are analyzed. The analysis results are validated through comparing with test results. With a large number of parametric studies, the critical parameters affecting the ultimate load bearing capacity and initial stiffness of joints under positive or negative moments are summarized. The results show the FE model of end plate connections between CFST columns and steel-concrete composite beams has good accuracy, so it can provide a reference for theoretical studies of semi- rigid connected composite frame with CFST columns.
出处
《建筑钢结构进展》
CSCD
北大核心
2015年第6期51-60,67,共11页
Progress in Steel Building Structures
基金
国家自然科学基金(51478158)
教育部新世纪优秀人才支持计划(NCET-12-0838)
关键词
钢管混凝土柱
组合梁
端板连接
非线性有限元分析
本构模型
极限承载力
初始刚度
concrete filled steel tube（CFST） column composite beam end plate connection nonlinear finite element analysis^constitutive model~ ultimate load bearing capacity
initial stiffness
