基础偏心时土-非对称结构相互作用体系参数分析  

PARAMETRIC RESEARCH ON SOIL-IRREGULAR STRUCTURE INTERACTION SYSTEM CONSIDERING ASYMMETRIC FOUNDATION

作　　者：姜忻良[1,2] 王美丽[1,3] 

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]军事交通学院基础部,天津300161

出　　处：《工程力学》2010年第9期74-79,共6页Engineering Mechanics

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：为分析基础偏心对非对称结构平扭耦联的影响,建立了考虑基础偏心的地基土-非对称结构相互作用运动方程。利用强解耦方法解耦后,编制MATLAB程序。分别详细分析了基础质量偏心率和刚度偏心率对上部结构地震反应的影响程度。得出基础质量偏心率对上部结构的影响很小,而基础刚度偏心率对上部结构的影响相对明显,尤其是对结构扭转反应的影响。通过对基础刚度偏心率为?0.6与0.6两种情况进行时程分析,验证了参数分析所得到的规律。In order to study the influence of asymmetric foundation on soil-irregular structure system, the vibration equation considering foundation with mass eccentricity and stiffness eccentricity was established. A MATLAB program was developed based on the solution of the vibration equation decoupled by forcing decoupling method to analyze the influence of two kinds of foundation eccentricity on the structure. It concluded that mass eccentricity of foundation has slight impact on the structure, but the stiffness eccentricity has a large influence on the structure, especially on the torsional response. The conclusions derived by parametric research previously are verified by time history analysis of interaction system with foundation stiffness eccentricities of ？0.6 and 0.6.

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

分 类 号：TU311.3[建筑科学—结构工程] TU435