复杂偏心结构-地基土体系在弹塑性阶段的平扭耦联变化规律与参数分析

项目名称： 复杂偏心结构-地基土体系在弹塑性阶段的平扭耦联变化规律与参数分析

项目编号： No.51278335

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 姜忻良

作者单位： 天津大学

项目金额： 80万元

中文摘要： 目前偏心结构弹塑性阶段平扭耦联分析多以均匀偏心情况为主，且一般仅局限于研究典型结构的数值计算，研究水平位移与扭转位移的大小与所占的比例，以及对它们对结构构件带来的危害，难以得到具有普遍性的规律。本项目将提出适用于复杂偏心结构的非均匀偏心率的计算模型，提出求解不同弹塑性阶段时结构体系的频率与周期，以摸清结构体系在不同弹塑性阶段时的动态动力特性，为分析弹塑性不同阶段影响偏心结构扭平耦联参数提供可能；同时为缩小复杂偏心结构-地基土相互作用弹塑性体系的计算规模，深入分析在水平地震作用下地基土的受力特点，将地基土区域划分为弹塑性与弹性两类区域，弹性区域采用超单元的方法，有效解决地基土的计算容量庞大问题。研究将为复杂偏心结构-地基土相互作用体系水平位移与扭转位移耦联弹塑性反应提供新的思路与方法。

中文关键词： 偏心结构；地基土；相互作用；平扭耦联；动力特性

英文摘要： At present stage the elastic-plastic translation-torsion coupling analysis of asymmetric structure is based on even eccentric structure, which generally only limited to studying the typical numerical calculation of the structure, the size and the proportion of the horizontal displacement and torsional displacement as well as the harm which damage to the structure components. So it is difficult to get the universal law. This project will propose a non-uniform asymmetric calculation model of the complex eccentric structure and the frequency and cycle of the different elastic-plastic stage of structural system for finding out the dynamic dynamic characteristics of the structure system in different elastic-plastic stage, in order to offer a possibility to the analysis of lateral-torsional coupling parameters which influence eccentric structure in different elastic-plastic stage. Meanwhile, in order to reduce the calculation scale of elastic-plastic system of the complex eccentric structure- soil interaction and depth analysis of the mechanical characteristics of the soil under horizontal seismic, soil area is divided into two types of elastic-plastic and elastic region which is analyzed with superelement approach to effectively solve the problem of the huge computing capacity of the soil. The study will provide new

英文关键词： Eccentric structures；Soil；Interaction；Lateral-torsional coupling；Dynamic characteristics