钢框架结构梁柱节点抗震加固有限元分析  

Finite element analysis of seismic strengthening of beam column joints in steel frame structures

作　　者：石若利 潘志成 李其伦 谢建斌 SHI Ruoli;PAN Zhicheng;LI Qilun;XIE Jianbin(School of Architecture and Planning,Yunnan University,Kunming 650504,China;Sinohydro Engineering Bureau 8 Co.Ltd,Changsha 410004,China)

机构地区：[1]云南大学建筑与规划学院,昆明650504 [2]中国水利水电第八工程局有限公司,长沙410004

出　　处：《扬州大学学报（自然科学版）》2021年第6期70-78,共9页Journal of Yangzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(11862024);云南大学校级课题资助项目(2020226).

摘　　要：为解决地震作用下钢框架结构发生节点域屈服问题,提出一种加腋改进型节点.利用ABAQUS软件建立节点模型,分析钢梁柱节点的滞回曲线、耗能曲线、骨架曲线和刚度退化曲线,探讨加腋节点抗震性能的变化机理.计算结果表明:加腋后节点的滞回曲线更加饱满,节点抗震性能得到有效提升;随着负载等级的提高,加腋节点承载力和最大转角绝对值减少;与未加固试件相比,加腋加固试件的承载力和延性都有所提高,加固效果显著.本文结果可为地震多发地区钢结构抗震研究提供理论依据.In order to solve the problem of joint domain yield of steel frame structure under earthquake,an improved haunched joint is proposed.The joint model is established by using ABAQUS software.The hysteretic curve,energy consumption curve,skeleton curve and stiffness degradation curve of steel beam column joints are analyzed,and the variation mechanism of seismic performance of haunched joints is discussed.The results show that the hysteretic curve is more full and the seismic performance of joints is effectively improved.After reinforcement,with the increase of load grade,the absolute value of joint bearing capacity and maximum rotation angle decreases.Compared with the unreinforced specimens,the bearing capacity and ductility of the haunched specimens are improved,and the reinforcement effect is remarkable.The above results provide a theoretical basis for the seismic research of steel structures in earthquake prone areas.

关 键 词：钢结构梁柱 加腋节点 有限元分析 抗震性能 

分 类 号：TU391[建筑科学—结构工程]