地基土-偏心结构平扭耦联分析模型与计算方法  

Analytical model and method of torsionally coupled buildings with foundation interaction

作　　者：姜忻良[1] 王美丽[1] 王学艳 

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,河南郑州450007

出　　处：《振动工程学报》2009年第5期546-551,共6页Journal of Vibration Engineering

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

摘　　要：提出了地基土-偏心结构相互作用体系分析模型,建立了5自由度相互作用平扭耦联运动方程。根据相互作用体系的特点,假设上部结构具有正交阻尼,单独对其采用振型分解法进行解耦,从而减少了自由度数,获得了频域内解析过程,分析了地基土性质对偏心结构平扭耦联状况带来的影响,为分析地基土-偏心结构平扭耦联效应提供了一种有效的计算方法。In order to study the effect of soil-structure interaction on the coupled lateral and torsional response of asymmetric buildings, this paper proposed the simplified soil-asymmetric structure interaction model, established g-degree-of-freedom lat- eral-torsional coupling vibration equations of soil-asymmetric structure system. Supposing that the damp of superstructure is orthogonal, this paper used the modal analysis method to the superstructure individually. So the number of unknowns is re- duced, which make it possible to obtain the analytical result in frequency domain. The effect of foundation on lateral-torsional coupling of asymmetric structure is learned. It provides an effective method to study torsional coupling of asymmetric structure with foundation interaction.

关 键 词：偏心结构 土-结构相互作用 平扭耦联 频域分析 模态分析 

分 类 号：TU311.3[建筑科学—结构工程] TU352.11