T形钢管混凝土柱-钢梁节点抗震性能试验研究  

Experimental study on seismic performance of joints between T-shaped concrete-filled steel tubular columns and steel beams

作　　者：时继瑞 程卫红 姜宇鑫 储德文 马宏睿 Shi Jirui;Cheng Weihong;Jiang Yuxin;Chu Dewen;Ma Hongrui(National Engineering Research Center of Building Technology,Beijing 100013,China;China Academy of Building Research,Bejing 100013,China)

机构地区：[1]国家建筑工程技术研究中心,北京100013 [2]中国建筑科学研究院有限公司,北京100013

出　　处：《建筑科学》2023年第11期1-9,共9页Building Science

基　　金：兵团科技攻关项目:BXSS建筑关键技术研发与示范应用(项目编号2018AB03)。

摘　　要：异形钢管混凝土柱-钢梁连接节点的抗震性能研究是异形钢管混凝土柱应用的基础研究之一。设计了2个采用侧面连接板构造的T形钢管混凝土柱-钢梁节点,并开展拟静力抗震性能试验研究,探究T形钢管混凝土柱-钢梁节点的破坏模式、滞回曲线、骨架曲线、应变发展、变形能力等。试验结果表明:侧面连接板构造的T形钢管混凝土柱-钢梁节点的破坏模式表现为T形钢管混凝土柱外侧钢梁的屈曲或屈服破坏,节点区基本处于弹性工作状态,满足强节点弱构件的设计要求;节点的滞回曲线饱满,且节点的正负向性能基本对称,节点的滞回耗能能力良好;应变分析表明钢梁翼缘内力向侧面连接板上转移,侧面连接板起到了预设的传力作用;侧面连接板处于较为复杂的压弯或拉弯受力状态;节点区柱壁板屈服后主应变方向基本稳定不变,角度约为30°~45°;该构造节点的变形延性系数均不小于2.75,极限转角变形均大于1/30,节点变形能力较好;对2个T形钢管混凝土柱-钢梁节点进行有限元分析,得到模拟计算结果与试验数据吻合较好,为后续参数化分析奠定基础。The study on seismic performance of joints between specially-shaped concrete-filled steel tubular(CFST)column and steel beam is one of the basic research on the application of specially-shaped CFST columns.Two joints constructed by lateral stiffeners between T-shaped CFST columns and steel beams are designed.Experimental research on quasi-static seismic performance is carried out.The failure mode,hysteresis curve,skeleton curve,strain development,deformation ability and other experimental results of joints between T-shaped CFST columns and steel beams are explored.The results show that the failure mode of joints constructed by lateral stiffeners between T-shaped CFST columns and steel beams manifests as buckling failure or yield failure of the steel beam on the outside of T-shaped CFST column.The joint area is basically in a flexible working state,which meets the design requirements of strong joints and weak members.The hysteresis curve of the joint is full,the positive and negative performance of the joint is basically symmetrical,and the hysteresis energy dissipation capacity of the joint is good.The strain analysis shows that the internal force of the steel beam flange transfers to lateral stiffeners,and lateral stiffeners play a preset role in force transmission.Lateral stiffeners are in a relatively complex pressure bending or tensile bending force state.The main strain direction is basically stable after the column wall plate in the nodal area yields,and the angle is about 30°~45°.The deformation ductility coefficient of the joint is not less than 2.75,the ultimate corner is greater than 1/30,and the joint has a good ability of deformation.The finite element analysis of two joints between T-shaped CFST column and steel beam is carried out,and the simulation results are in good agreement with the experimental data,which laid the foundation for subsequent parametric analysis.

关 键 词：T形钢管混凝土柱 梁柱节点 滞回曲线 骨架曲线 侧面连接板 补强板 

分 类 号：TU317[建筑科学—结构工程] TU352