竖向不规则钢框架双层隔震体系抗震性能分析  

Seismic Performance Analysis of Double Layer Isolation System with Vertically Irregular Steel Frame

作　　者：余龙[1] 胡建安 汪伟 尤超 冯环[1] YU Long;HU Jian'an;WANG Wei;YOU Chao;FENG Huan(College of Civil Engineering,Chuzhou Polytechnic,Chuzhou Anhui 239000,China;Hefei Urban Construction Development Co.,Ltd,Hefei 230031,China;Anhui Institute of Building Research&Design,Hefei 230088,China)

机构地区：[1]滁州职业技术学院建筑工程学院,安徽滁州239000 [2]合肥城建发展股份有限公司,合肥230031 [3]安徽省建筑科学研究设计院,合肥230088

出　　处：《长春工程学院学报(自然科学版)》2025年第1期40-45,共6页Journal of Changchun Institute of Technology:Natural Sciences Edition

基　　金：安徽省中青年教师培养行动优秀青年教师培育项目(YQYB2023162);安徽省教育厅高校自然科学研究重点项目(KJ2021A1410,2022AH052650);教育部高等学校科学研究发展中心专项课题(ZJXF2022080)。

摘　　要：以某9层竖向不规则钢框架结构为对象,采用SAP2000软件对罕遇地震作用下的5种不同结构工况进行模拟分析,探讨双层隔震体系的抗震性能及隔震层设置位置的不同对结构减震效应的影响。通过对结构进行非线性分析,对比各工况的自振周期、层间剪力和楼层位移等性能指标,表明竖向不规则钢框架采用双层隔震体系能显著提升结构抗震性能,并有效降低结构的层间剪力突变。在双层隔震体系中,随着上部隔震支座设置位置高度的增加,结构抗震性能呈降低趋势,因此在工程设计中应将上部隔震支座设置于主体结构下部位置。Taking a 9-story vertically irregular steel frame structure as the object,SAP2000 software is used to simulate and analyze five different structural conditions under rare earthquake action,and to explore the seismic performance of the double-layer isolation system and the influence of different isolation layer positions on the seismic reduction effect of the structure.Through nonlinear analysis of the structure and comparison of performance indicators such as natural vibration period,inter story shear force,and floor displacement under various working conditions,it is shown that it can significantly improve the seismic performance of the structure and effectively reduce the abrupt changes in inter story shear force,using a double-layer isolation system for vertical irregular steel frames.In a double-layer isolation system,as the height of the upper isolation bearing increases,the seismic performance of the structure tends to decrease.Therefore,the upper isolation bearing should be placed at the lower part of the main structure in engineering design.

关 键 词：钢框架 双层隔震体系 隔震支座 竖向不规则 

分 类 号：TU352.1[建筑科学—结构工程]