基于土-结构体系对建筑结构响应的减震效果评估  

Evaluation of Damping Effects of Building Structures Based on Soil-Structure Interaction System

作　　者：徐瑞御 任宏伟 XU Ruiyu;REN Hongwei(Department of Resource Exploration and Civil Engineering, The Engineering & Technical College of Chengdu University of Technology, Leshan 614000, Sichuan, China)

机构地区：[1]成都理工大学工程技术学院资源勘查与土木工程系,四川乐山614000

出　　处：《地震工程学报》2020年第3期613-623,共11页China Earthquake Engineering Journal

基　　金：四川省教育厅《成都地铁8号线一期工程地下水影响研究》(18ZB0086)。

摘　　要：提出一种基于土-结构体系地震记录的土-结构相互作用(SSI)的减震评估方法。该方法采用简化的SSI模型,通过系统辨识确定模型参数。将上部建筑结构地震反应的SSI减震效应分解为惯性相互作用和运动相互作用,同时还提出由惯性相互作用和运动相互作用单独降低结构响应的方法。将2011年东北地震太平洋沿岸期间两栋中层建筑用此方法进行分析,结果表明:当建筑物结构响应进入非弹性范围时,惯性相互作用的减震效果降低。This paper presents a seismic assessment method for soil-structure interaction(SSI)based on the seismic records of soil-structure systems.A simplified SSI model is adopted,and the model parameters are determined through system identification.The SSI damping effect of the seismic response of a superstructure is decomposed into inertial interaction and kinematic interaction.Moreover,a method of reducing structural response by inertial interaction and motion interaction is proposed and used to analyze two middle-story buildings along the Pacific coast during the Tohoku-Oki earthquake of 2011.The results show that the damping effect of the inertial interaction decreases when the structural response of the building enters the inelastic range.

关 键 词：土壤 摇摆模型 建筑结构 惯性相互作用 运动相互作用 减震 

分 类 号：TU375.4[建筑科学—结构工程]