带可替换腹板连接型耗能梁段的恢复力模型研究  

Restoring force model of web-connected replaceable shear links

作　　者：殷占忠[1,2] 杨元普 冯大哲 YIN Zhanzhong;YANG Yuanpu;FENG Dazhe(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,Gansu,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《地震工程学报》2023年第4期751-760,共10页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51968044);甘肃省建设科技攻关项目(JK2022-06);甘肃省优秀博士生项目(22JR5RA234)。

摘　　要：带可替换耗能梁段的偏心支撑钢框架具有震后修复方便、经济等优点,但目前国内外学者对该类型的研究很少。为此,设计16组与偏心支撑钢框架采用螺栓连接的腹板连接型耗能梁段,并对16组试件进行数值模拟分析,讨论截面尺寸、耗能长度、加劲肋间距、加劲肋布置以及综合参数等变化参数对腹板连接型耗能梁段在低周往复荷载作用下的滞回性能、骨架曲线的影响,建立腹板连接型耗能梁段简化的恢复力模型。结果表明,影响腹板连接型耗能梁段耗能的主要参数是截面尺寸,建立的恢复力模型与模拟的骨架曲线对比吻合较好,可以为此类耗能梁段弹塑性分析作为参考。It is convenient and economical to repair eccentrically braced steel frames with replaceable shear links after an earthquake,but few studies have focused on it domestically and internationally.Therefore,16 groups of web-connected shear links connected by bolts with eccentrically braced steel frames were designed and analyzed through numerical simulations.The effect of changing the parameters(section size,length of the energy dissipation section,stiffener spacing,stiffener arrangement,and comprehensive parameters)on the hysteretic performance and the skeleton curve of web-connected shear links under low-cyclic reversed loading was discussed,and the simplified restoring force model of shear links was established.The results show that section size is the parameter that primarily influences the energy dissipation of the web-connected shear links.The proposed restoring force model is in good agreement with the simulated skeleton curve,which can be used as a reference for elastic-plastic analysis of such shear links.

关 键 词：腹板连接型耗能梁段 抗震性能 恢复力模型 数值模拟 

分 类 号：TU391[建筑科学—结构工程]