摘要
通过离散弹簧模型模拟层间隔震结构的土-结构相互作用(SSI效应),建立了层间隔震结构考虑SSI效应的简化4自由度体系(4-DOF)的结构动力方程,推导了由4自由度体系(4-DOF)向等效2自由度体系(2-DOF)的等效方程。基于等效2-DOF简化计算模型,给出了考虑SSI效应的层间隔震结构地震响应预测的计算流程,并通过一个算例对两种简化模型进行了对比验证分析。结果表明:对层间隔震结构进行考虑SSI效应的地震响应预测分析时,基于等效2-DOF的简化计算模型可替代常用的4-DOF模型,方法简单有效且精度符合要求。
Dynamic equation of simplified 4 freedom system（ 4-DOF） related to inter-story isolated structure is built based on SSI effect. The transformation equation of 4-DOF transformed to equivalent 2 freedom system（ 2-DOF） is derived. Based on 2-DOF simplified calculation model,the calculation process is put forward,which is used to predict the seismic response of inter-story isolated structure that should be taken account into SSI effect. By taken a project as study case,two simplified models are verified by time-history method. The result shows that,the2-DOF simplified calculation method has matched the requirements,and can replace the 4-DOF system,a frequently-used method.
作者
刘德稳
蒋蜀江
房思彤
李航
张亚飞
LIU Dewen;JIANG Shujiang;FANG Sitong;LI Hang;ZHANG Yafei(College of Civil Engineering,Southwest Forestry University,Kunming 650000,China;Key Laboratory of Earthquake Resistance and Absorption Engineering＆ Structure Safety of Ministry of Education,Guangzhou University,Guangzhou 510405,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2018年第4期77-84,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51478131)
云南省农业基础基金项目(2017FG001-097)~~
作者简介
刘德稳（1983-），男，副教授，博士，主要从事隔震减震研究．E-mail：civil_liudewen@sina．com
