模块化预制钢骨混凝土柱-钢梁组合节点抗震性能试验研究  

Experimental Research on Seismic Performance of Modular Prefabricated Steel-Reinforced Concrete Column to Steel Beam Composite Joints

作　　者：吴成龙[1] 王其辉 李绍辉 刘继明[1] WU Chenglong;WANG Qihui;LI Shaohui;LIU Jiming(College of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《工业建筑》2022年第4期74-83,共10页Industrial Construction

基　　金：国家自然科学基金项目(51078195);山东省高校科研计划项目(A2018-065)。

摘　　要：提出了一种适用于建筑工业化的模块化组合节点,以梁-柱-节点核心区分离、模块化预制的理念设计了3个基础试件,通过拟静力试验,获得了不同梁柱线刚度比(k_(i))时各节点的破坏过程、破坏特征,分析了节点的滞回曲线、骨架曲线、延性耗能及刚度退化等抗震性能。结果表明:随着k_(i)值的增大,节点呈现出由梁端受弯向节点剪切、柱端压弯的破坏模式发展,且经历了弹性、弹塑性和破坏三个阶段。节点的滞回曲线饱满,骨架曲线均呈“S”型,节点的整体刚度退化性能稳定,其平均延性系数在3.71~4.25之间,极限转角在0.0646~0.0760 rad之间,平均等效黏滞阻尼系数在0.32~0.33之间,节点表现出良好的力学性能和滞回特性。梁柱线刚度比对纵向钢筋和混凝土的应变影响较大,而对H型钢骨、钢梁腹板和翼缘连接板的应变影响较小;节点核心区受剪机理与“斜压杆”基本一致。A modular composite joint suitable for the industrialization of buildings was proposed.Three basic specimens were designed with the concept of beam-column-joint core area separation and modular prefabrication.Through the quasi-static test,the failure process and failure characteristics of each joint with different beam-to-column liner stiffness ratios(k_(i))were obtained.The seismic performance of joints such as hysteresis curve,skeleton curve,ductility,energy consumption,and stiffness degradation were analyzed.The results showed that with the increase of k_(i) value,the failure mode of the joints developed from beam-end bending to joint shear and column-end compression bending,and had experienced three stages of elasticity,elastoplasticity,and failure.The hysteresis curve of the joints was full,and the skeleton curve was in the shape of‘S’.The overall stiffness degradation performance of the joints was stable,the mean ductility coefficients were in the range of 3.71-4.25,the limit rotation angles were in the range of 0.0646-0.0760 rad,and the mean equivalent viscous damping coefficients were in the range of 0.32-0.33,and the joints showed good mechanical and hysteretic properties.The beam-to-column linear stiffness ratio had a greater impact on the strain of longitudinal reinforcement and concrete but had a smaller impact on the strain of H-shaped steel skeleton,steel beam webs,and flange connecting plates.The shear mechanism of the joint core area was consistent with that of the‘oblique strut’.

关 键 词：装配式组合结构 梁柱节点 抗震性能 拟静力试验 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9