基于强解耦方法的土-结构平扭耦联参数分析  

Parametric analysis for a soil-structure interaction system with lateral-torsional coupling based on forced decoupling method

作　　者：姜忻良[1,2] 王美丽[1] 王学艳 

机构地区：[1]天津大学建工学院,天津300072 [2]天津市土木工程结构及新材料重点实验室,天津300072 [3]河南省纺织建筑设计院有限公司,郑州450007

出　　处：《振动与冲击》2009年第10期154-157,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金重大研究计划项目(90815025);国家自然科学基金项目((50878143)

摘　　要：为分析各参数对地基土-偏心结构相互作用体系的影响规律,利用地基土-单层偏心结构运动方程求得的解析解编制了MATLAB程序,详细分析了扭平频率比Ω、偏心率B、结构高宽比λh和地基土特性对相互作用体系自振特性、弹性地震反应的影响规律以及对平扭耦联程度的影响情况,得到了各种土性条件下,地基土-偏心结构相互作用体系与刚基上偏心结构在平动位移与扭转位移传递函数的差异与变化趋势等规律。In order to study the effect of different parameters on the dynamic response of a soil-asymmetric structure system,a MATLAB program based on the analytic solution of interaction system's dynamic equation was developed here.Then,the influence of torsional to lateral frequency ratio Ω,eccentricity ratio B,height-to-width ratio λh and the foundation properties on the free vibration characteristic,elastic seismic response and the lateral-torsional coupling effect of the interaction system were thoroughly analyzed.It was concluded that the influence of such parameters on the lateral displacement transfer functions and torsional displacement transfer functions of the soil-asymmetric structures were different from the influencing laws of parameters on asymmetric structures on rigid foundation.

关 键 词：偏心结构 强解耦 土-结构相互作用 平扭耦联 频域分析 参数分析 

分 类 号：TU311.3[建筑科学—结构工程] TU352.11