带抗风支座的组合隔震体系隔震层布置优化及试验分析  

Optimization and tests of isolation layer arrangement for a combined isolation system with anti-wind supports

作　　者：李飞燕[1] 吴应雄[2] LI Feiyan;WU Yingxiong(Department of Civil Engineering,Xiamen University Tan Kah College,Zhangzhou 363105,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]厦门大学嘉庚学院土木工程系,漳州363105 [2]福州大学土木工程学院,福州350116

出　　处：《振动与冲击》2019年第19期161-167,197,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51778149);漳州市自然科学基金项目(ZZ2018J24);福建省中青年教师教育科研项目(JAT160652)

摘　　要：风荷载较大地区的隔震结构设计存在隔震效果、抗风设计和隔震层位移受控难以协调的问题。提出增设抗风支座协同隔震支座的组合隔震体系,利用抗风支座变刚度工作机理解决设计难题。介绍了新型钢板抗风支座的构造,并以某实际工程为例,根据我国《建筑抗震设计规范》(GB 50011—2010)将隔震后结构的水平地震作用归纳为比非隔震时降低半度、一度和一度半三个档次,建立三种对比隔震模型并进行计算分析,从而进行隔震层布置优化。分析结果表明:增设新型钢板抗风支座可以同时满足隔震效果、抗风承载力和隔震层位移受控的要求;提出隔震支座的水平承载力宜接近风载下隔震层水平剪力标准值,从而保证结构正常工作状态的建议;抗风支座设计应重点验算抗剪强度要求;抗风支座数值模拟和静载抗剪试验结果表明,其在正常使用和小震下提供抗剪承载力,中震下破坏退出工作,保证结构隔震效果。Isolation structure design in areas with larger wind load has problems of isolation effect,anti-wind design and controlling displacement of isolation layer being difficult to coordinate with each other.Here,a combined isolation system with additional anti-wind supports to coordinate with isolation ones was proposed to apply the variable stiffness mechanism of anti-wind supports to overcome design difficulty.The structure of the new type steel plate anti-wind supports was introduced.Taking a practical project as an example,according to China’s“aseismic design code of buildings”(GB 50011—2010),horizontal seismic actions of a structure after isolation were summed as three levels including 0.5,1 and 1.5 lower than those of the structure without isolation.3 types of contrast isolation models were built to do calculation and analysis,and optimize isolation layer arrangement.The results showed that the new arranged steel plate anti-wind supports can simultaneously meet requirements of isolation effect,anti-wind load-bearing ability and controlling displacement of isolation layer;the horizontal load-bearing capacity of isolation supports should be close to the standard value of horizontal shear force of isolation layer under wind load to ensure the normal working condition of the structure;the design of anti-wind supports should focus on checking requirements of shear strength.Numerical simulation and static-load shear tests of anti-wind supports showed that they can provide shear-bearing capacity under normal use and small earthquakes;they are damaged and lose working ability under medium-earthquakes to ensure the structural isolation effect.

关 键 词：抗风支座 组合隔震体系 布置优化 静载抗剪试验 

分 类 号：TU373.5[建筑科学—结构工程]