地基土-两层偏心结构相互作用体系平扭耦联参数分析  

Parametric analysis for translational-torsional coupling of a system of eccentric two-tier building and foundation interaction

作　　者：王美丽[1,2] 姜忻良[1,3] 

机构地区：[1]天津大学建工学院,天津300072 [2]军事交通学院基础部,天津300161 [3]天津市土木工程结构及新材料重点实验室,天津300072

出　　处：《振动与冲击》2012年第7期128-132,141,共6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：为研究地基土-两层偏心结构相互作用体系的地震反应,对平扭耦联问题进行参数分析。利用拉格朗日能量法建立土-两层偏心结构相互作用体系平扭耦联运动方程,求得频域内解析解,编制MATLAB程序,确定影响两层偏心结构平扭耦联的主要参数,详细分析扭平频率比Ω、偏心率B、偏心楼层位置和地基土特性等参数对相互作用体系弹性地震反应的影响规律,以及对平扭耦联程度的影响状况,得到一些与刚基上偏心结构平扭耦联反应不同的参数影响规律,为工程计算和设计提供参考。In order to study the earthquake response of a system of eccentric two-tier building and foundation interaction, parametric analysis for its translational-torsional coupled response was conducted here. Translational-torsional coupling vibration equations of a soil-asymmetric structure interaction system were established with Lagrangian energy method. The analytical solution in frequency domain was obtained and a MATLAB program was made. Then, the main parameters influencing the translational-torsional coupled response were determined and the influence law of torsional to translational frequency ratio f~, eccentricity ratio B, the location of eccentric floor and the foundation soil properties on the elastic seismic response and the translational-torsional coupling level of the interaction system were thoroughly analyzed. Finally, some valuable conclusions different from those for the structure on rigid foundation were obtained, providing a reference for engineering calculation and design of structure.

关 键 词：两层偏心结构 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