偏心结构-地基土相互作用平扭耦联参数的范围及影响分析  

RANGE OF PARAMETERS AND ITS PERFORMANCE RESEARCH ON TORSIONAL COUPLING OF SOIL-ASYMMETRIC STRUCTURE INTERACTION SYSTEM

作　　者：姜忻良[1] 王美丽[1] 王学艳[1,2] 

机构地区：[1]天津大学建工学院,天津300072 [2]河南省纺织建筑设计研究院,郑州450000

出　　处：《工程力学》2009年第3期73-78,127,共7页Engineering Mechanics

基　　金：国家自然科学基金委重大研究计划项目(90815025);国家自然科学基金委项目(50878143);博士点基金项目(20040056032)

摘　　要：为研究地基土对偏心结构带来的影响,该文提出偏心结构-地基土相互作用体系简化计算模型,通过偏心结构-地基土相互作用平扭耦联运动方程的解析过程,确定了影响结构弹性反应的主要参数,并对考虑相互作用后参数的范围进行了确认。应用时程分析法,对结构进行弹性时程法和解析法的参数影响的对比分析,验证了时程分析法的可行性,进而应用时程分析法分析弹塑性阶段参数对结构体系的影响,得到了弹塑性阶段振型相对位移比存在局部增大等结果。研究结果为结构地震扭转效应的工程计算和设计提供参考。In order to study the influence of foundation soil on eccentric structure, this paper sets up the simplified foundation-asymmetric structure interaction model and derives the main influencing factors and their ranges that influence the structure＇s elastic response by solving the lateral-torsional coupling equation of the foundation-asymmetric structure interaction system. The parameters＇ elastic influencing rules derived by time-history analysis coincide well with analytic solutions, which verify the effectiveness of the time-history analysis. Through using the time-history analysis, this paper studies the laws how the parameters influence the inelastic seismic response. It produces local amplification of relative displacement by comparing the inelastic seismic response with the elastic seismic response. The conclusions provide references for the design and calculation of asymmetric structures under earthquake.

关 键 词：偏心结构 平扭耦联 土-结构相互作用 弹塑性 时程分析法 

分 类 号：TU311.3[建筑科学—结构工程] TU352.11