钢支撑-框排架结构动力试验及有限元分析  

Dynamic Test and Finite Element Analysis of Steel Brace-Frame Bent Structure

作　　者：高向宇[1] 李振宇[1] 史安琪 王作杰 刘凯雁 李杨龙 张国伟[1] GAO Xiangyu;LI Zhenyu;SHI Anqi;WANG Zuojie;LIU Kaiyan;LI Yanglong;ZHANG Guowei(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Glory PKPM Technology Co.,Ltd.,Beijing 100013,China;North China Power Engineering Co.,Ltd.of China Power Engineering Consulting Group,Beijing 100120,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]北京构力科技有限公司,北京100013 [3]中国电力工程顾问集团华北电力设计院有限公司,北京100120 [4]北京建筑大学土木与交通工程学院,北京100044

出　　处：《北京工业大学学报》2022年第12期1238-1247,共10页Journal of Beijing University of Technology

基　　金：北京市自然科学基金资助项目(8141001);中国电力工程顾问集团华北电力设计院有限公司科技项目(K2017-T201)。

摘　　要：为研究常规钢支撑-框排架结构在高烈度地区的抗震性能,进行了缩尺比例为1∶20的振动台试验,研究了结构的频率、层间位移角、地震动峰值加速度放大系数以及结构损伤分布等情况.采用ABAQUS有限元软件建立了相应的缩尺有限元模型,对试验结果进行了验证,并对结构薄弱部位进行了加固分析.试验与有限元分析结果表明:在8度罕遇地震作用后,钢支撑-框排架结构频率退化较小,结构顶部存在鞭梢效应,层间位移角满足规范要求,损伤主要集中在结构第5层沿纵向布置的钢支撑,加强该层支撑后有效缓解了结构损伤分布.To investigate the seismic performance of conventional steel brace-frame bent structures in high-intensity areas,a shaking table test with a scale ratio of 1∶20 was carried out.The frequency,inter-story drift ratio,acceleration amplification factor,and damage distribution were studied.Besides,a corresponding scaled finite element model was established by ABAQUS finite element software,which was compared with the test results.The weak parts of the structure were strengthened and analyzed.Results of the test and the finite element model show that after an 8-degree rare earthquake,the structure's natural frequency degradation is small,the whipping effect occurs at the top of the structure,inter-story drift ratio meets code requirements,and the major damage is concentrated on the steel braces arranged longitudinally of the fifth story.After strengthening the braces on this floor,the structural damage is effectively alleviated.

关 键 词：钢支撑-框排架结构 振动台试验 有限元 高烈度地区 火电厂 抗震分析 

分 类 号：TU375.4[建筑科学—结构工程]