摘要
地震波产生后经过建筑物地面场地土的过滤然后作用于建筑物,不同场地条件下场地土的过滤器特征参数不同,引起结构的地震响应大小也有所差别,为研究层间隔震体系在不同场地条件下的失效概率,文中以1栋8度设防烈度区的框剪层间隔震结构为例,基于随机振动理论和虚拟激励法,分析不同场地条件下层间隔震结构的随机地震响应和失效概率。结果表明在1层柱顶设置隔震支座后,结构的自振周期明显延长,场地土条件越好,隔震效果越好,对上部结构的减震效果也越好,结构失效概率越低。
Seismic waves act on the buildings after filtering by the ground soil of the building.The characteristic pa⁃rameters of the soil filter vary with site conditions,which leads to different response of the structure in the seismic.A frame shear interlayer isolation structure in an 8-degree seismic intensity zone is taken to study the failure probabili⁃ty of interlayer isolation systems under different site conditions.With random vibration theory and virtual excitation method,the random seismic response and failure probability of isolation structures between lower layers under differ⁃ent site conditions are studied.The results show that the natural vibration period of the structure is significantly pro⁃longed after installing isolation bearings on the top of a column on the first floor.The better soil conditions on the site,the better isolation effectiveness is,which lowers the failure probability of structural.
作者
刘小换
余尚
LIU Xiaohuan;YU shang(School of Architecture and Engineering,Guangzhou Vocational University of Science and Technology,Guangzhou 510550,China;Guangdong Architectural Design&Research Institute Co.,Ltd.,Guangzhou 510010,China)
出处
《低温建筑技术》
2023年第6期16-19,共4页
Low Temperature Architecture Technology
基金
广东省教育厅普通高校青年创新人才项目“罕遇地震下层间混合隔震体系失效模式及参数优化研究”(2022KQNCX148)。
关键词
层间隔震
场地条件
虚拟激励法
随机地震响应
失效概率
inter-story isolation
site category
pseudo excitation method
random seismic response
failure probability
