防灾减灾工程学报2025，Vol.45Issue(2)：405-415,11.DOI:10.13409/j.cnki.jdpme.20231009002
不同上部结构高宽比的土-桩-隔震结构体系地震响应分析
Seismic Response Analysis of Soil-Pile-Isolated Structures with Different Aspect Ratios of Superstructure
摘要
Abstract
To explore the influence of aspect ratio on the seismic responses of base-isolated structures built on flexible foundations,four traditional seismic-resistant and base-isolated frame structure mod-els with different aspect ratios were established using ABAQUS finite element software.For different site conditions,models of base-isolated structures on both flexible and rigid foundations were estab-lished for comparison,so as to analyze the influence of Soil-Structure Interaction(SSI)effect on the seismic response patterns and isolation efficiency in structures with different aspect ratios.The results showed that with the increase of the aspect ratio,peak floor accelerations in isolated structures first de-creased and then increased with increasing floor levels.Meanwhile,the displacement of the isolation layer continuously decreased,and the isolation efficiency gradually decreased.However,the variation patterns of the isolation efficiency with increasing floor levels were inconsistent among structures with different aspect ratios.For structures with smaller aspect ratios,the isolation efficiency was optimal at the top floor.As the aspect ratios increased,the optimal isolation efficiency layer appeared in the up-per middle floors.Furthermore,by using peak floor acceleration,isolation layer displacement,and isolation efficiency as research parameters,it was concluded that SSI effect showed significantly stron-ger influence on isolation layers and top floor of structures compared to other floors.The SSI effect in-creased the displacement response of isolation layer in isolated structures and reduced the isolation effi-ciency of the isolation system.This adverse influence intensified with increasing aspect ratios of isolat-ed structures..Therefore,when designing isolated structures,the combined influence of the aspect ra-tio of the superstructure and the SSI effect on structures should be comprehensively considered.关键词
基础隔震结构/桩基础/高宽比/地震响应/隔震效率Key words
base-isolated structure/pile foundation/aspect ratio/seismic response/isolation efficiency分类
建筑与水利引用本文复制引用
单志承,于旭,庄海洋,吴晓飞..不同上部结构高宽比的土-桩-隔震结构体系地震响应分析[J].防灾减灾工程学报,2025,45(2):405-415,11.基金项目
国家自然科学基金面上基金资助项目(51778282)资助 （51778282）
