方钢管混凝土柱-削弱钢梁端组合梁节点受力性能研究  

Study on mechanical behavior of concrete-filled square tubular column and steel-concrete composite beam with reduced beam section joints

作　　者：周天华[1] 聂少锋[1] 叶武[2] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]杭州锅炉集团股份有限公司,浙江杭州310004

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第5期612-619,共8页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省自然科学基金资助项目(2004E205)

摘　　要：利用三维实体单元,对"带内隔板的方钢管混凝土柱-削弱梁端的钢与混凝土组合梁框架节点"建立了考虑几何非线性和材料非线性的有限元理论分析模型,通过对已有试验模型的模拟分析,验证了有限元方法的正确性,进而模拟分析了"框架节点"在单调和低周反复荷载作用下的受力性能,深入研究了其荷载-位移曲线、节点区梁端的应力分布规律、耗能能力及破坏特征.研究表明:混凝土楼板的组合作用可以适当提高节点的承载力和刚度,且对削弱梁端节点区的应力分布影响较小;梁端削弱组合梁各节点的承载力和刚度均比梁端无削弱组合梁节点的有所降低,但降低幅度不大;梁端削弱组合梁各节点均表现出良好的延性及耗能能力.The nonlinear FEM models of concrete-filled square tubular column with internal diaphragms to composite steel- concrete beams with reduced beam section connections involving geometric ally large deformation and materials nonlinear is presented. The 3D models of beam-to-column joints with internal diaphragms by 3D solid elements are founded. The results of FEM are fit close to that of the tests. We can conclude that FEM in this paper is correct. And the bearing capacity behavior of joints under the monotonic loading and cyclic loading are analyzed, including P-△ curves, the stresses distribution of beam, the dissipating energy ability and the destruction form. The analysis results show that considering the concrete floor, the bearing capacity and stiffness of the joints increased properly, and the influence of the stresses distribution in the joints is small. The bearing capacity and stiffness of composite beam with reduced beam section joints are a little lower than that of the non-reduced beam sections joint. The joints studied in this paper display a better ductility and dissipating energy ability.

关 键 词：方钢管混凝土柱 梁柱节点 削弱梁端 钢与混凝土组合梁 有限元分析 

分 类 号：TU377[建筑科学—结构工程]