静载作用下屈曲约束支撑-混凝土框架中节点性能分析  

Performance analysis of beam-column interior joint of buckling restrained brace reinforced concrete frame under monotonic loading

作　　者：朱江[1] 李帼昌[2] Zhu Jiang;Li Guo-chang(Architectural and Civil Engineering College,Shenyang University,Shenyang 110044,China;School of Civil Engineering,Shenyang Jian zhu University,Shenyang 110168,China)

机构地区：[1]沈阳大学建筑工程学院,辽宁沈阳110044 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《工程抗震与加固改造》2022年第3期56-64,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51178276)。

摘　　要：提出了一种用于混凝土框架结构中屈曲约束支撑连接中节点构造形式。通过大型有限元分析软件ABAQUS对这种节点在静载下的性能进行分析,给出了该节点的弯矩-转角曲线,同时研究受力全过程中节点裂缝和变形发展,明确节点极限状态和破坏模式;揭示节点各组成部分的应力包括核心区剪应力的发展情况;研究了各部分变形与整体变形的关系和所占比例。分析结果表明:节点的破坏是由于梁的混凝土被压碎造成的,满足“强柱弱梁”和“强节点、弱构件”的抗震设计要求,并且节点受力均匀,传力明确,具有良好的力学性能。A type of connection is proposed to connect buckling restrained braces in reinforced concrete frames. Performance under Monotonic load of the joint are analyzed by ABAQUS, the moment rotation curve of the node is given, at the same time the development of cracks and deformations is studied, and the ultimate state and the failure mode are determined. In addition, the stress of each part of the joint and the shear force in the joint core are obtained. The relationship between the deformation of each part and the whole deformation is studied. The analysis results show that the failure of the joint is caused by the concrete crushing of the beam, the joint satisfies the seismic design requirements of "strong column weak beam" and "strong node, weak member" and the stress of the joint is uniform and the force is clear and have good performance.

关 键 词：屈曲约束支撑 有限元分析 弯矩—转角曲线 力学性能 节点 

分 类 号：TU4[建筑科学—土工工程]