节点区柱钢管非连续式方钢管混凝土柱-梁节点受剪性能研究  

SHEAR BEHAVIOR OF COLUMN-BEAM JOINTS OF CONCRETE-FILLED SQUARE STEEL COLUMNS WITH DISCONTINUED JOINT ZONES

作　　者：何岸[1] 蔡健[1,2] 陈庆军[1,2,3] 汤序霖[1] 左志亮[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]亚热带建筑科学国家重点试验室,广州510641 [3]澳大利亚新南威尔斯大学CIES研究中心,土木与环境学院,澳大利亚悉尼NSW2052

出　　处：《工程力学》2015年第9期165-173,共9页Engineering Mechanics

基　　金：华南理工大学中央高校基本科研业务费专项资金资助项目(2014ZZ0026);华南理工大学亚热带建筑科学国家重点实验室自主研究课题项目(2013ZC19);广东省自然科学基金项目(S2013040015140);国家留学基金项目;国家自然科学基金青年科学基金项目(51408230)

摘　　要：为研究节点区柱钢管非连续式钢管混凝土柱-梁节点的受剪性能,对5个柱-梁中节点试件进行低周反复荷载试验。对节点的破坏形态和骨架曲线进行分析,结果表明随着节点面积增大系数(节点面积/柱面积)和相对配筋系数(节点体积配筋率/梁配筋率)的增大,节点的受剪承载力和延性逐渐改善。基于修正斜压场(MCFT)的基本理论,并对节点的受力边界进行简化,建立该节点在剪、压复合作用下的抗剪承载力计算方法;采用该文的简化方法计算得到的节点峰值剪应力与试验结果进行对比,二者吻合良好。To investigate the shear behavior of column-beam joints of concrete filled square steel columns with discontinued joint zones, five joint specimens were tested under cyclic loadings. The failure patterns and the skeleton curves showed that the shear bearing capacity and ductility of the joint were improved with the increase in the relative dimension of the joint （the sectional area of the joint divided by the sectional area of the column） and the relative reinforcement ratio （the mesh reinforcement ratio of the joint divided by the reinforcement ratio of the beam）. Based on the Modified Compression Field Theory （MCFT） and the simplification of the stress boundary conditions of the joint, an analytical for calculating the shear bearing capacity of the joint under combined actions of axial and shear loads was established. The peak shear stresses calculated by the proposed model agreed well with experimental results.

关 键 词：钢管混凝土 柱-梁节点 受剪性能 修正斜压场 拟静力试验 

分 类 号：TU318[建筑科学—结构工程]