考虑SSI效应的带地下室RC框架结构抗震性能研究  

Study on seismic performance of RC frame structure with basement considering SSI effect

作　　者：钟岱辉[1] 宋潇然 ZHONG Daihui;SONG Xiaoran(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101

出　　处：《山东建筑大学学报》2024年第2期8-15,共8页Journal of Shandong Jianzhu University

摘　　要：土-结构相互作用效应(Soil-Structure Interaction,SSI)是带地下室钢筋混凝土(Reinforced Concrete,RC)框架结构抗震性能分析的重要因素。基于模态和动力时程分析,通过有限元分析软件系统探究了地下室顶板嵌固、基础顶面嵌固和考虑SSI效应地下室周围土体嵌固等3种不同嵌固方式的RC框架结构抗震性能。结果表明:考虑SSI效应带地下室RC框架结构的自振周期明显延长,其中心柱剪力、各层加速度和层间位移角均有所减小;基础顶面嵌固模型未考虑SSI效应,其计算结果较为保守;SSI效应对带地下室RC框架结构会产生较大的减震影响。Soil-Structure Interaction(SSI)effect plays a crucial role in the seismic performance analysis of reinforced concrete(RC)frame structures with basements.Utilizing modal analysis and dynamic time history analysis through finite element software,this paper explores the seismic performance of RC frame structures with three distinct embedding models:basement roof embedding,foundation top surface embedding,and soil embedding around the basement considering SSI effect.The findings indicate that,the natural vibration period of the RC frame structures with basement considering SSI effect significantly extends,accompanied by a reduction in central column shear force,acceleration across each layer,and interlayer displacement angle.The foundation top surface embedding model,which neglects SSI effect,yields relatively conservative results;while SSI effect on RC frame structures with basements will have a significant seismic reduction impact.

关 键 词：动力时程分析 抗震性能 SSI效应 地下室 等效黏弹性人工边界 

分 类 号：TU375[建筑科学—结构工程]