偏心结构扭转振动研究中几个基本参量的讨论  

Discussion on several basic parameters in study of seismic torsional effects of asymmetric structures

作　　者：戴君武[1] 张敏政 黄玉壟 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080 [3]香港理工大学土木与结构工程系

出　　处：《地震工程与工程振动》2002年第6期38-43,共6页Earthquake Engineering and Engineering Dynamics

基　　金：社会公益研究专项资金项目 (2 0 0 1DIB2 0 0 98)

摘　　要：本文根据工程振动实测观察及结构地震模拟实验中的模态测量结果指出 ,通常的确定性弹性分析方法中 ,直接由构件的几何尺寸确定其刚度并进而确定结构的自振特性 ,进行结构的弹性反应分析和设计 ,其结果只能代表结构处于完全理想弹性状态时对外界激励的一种理论估计。由此提出了比较切合实际的基于强度及屈服变形的构件刚度的确定方法 ,进而指出在偏心结构的扭转振动研究中 ,结构的刚度偏心实际上依赖于强度偏心 ,并不能随研究者的意愿随意调整。According to the vibration observation from real building structures and the modal test results in earthquake simulation tests, this paper indicates that the traditional elastic analysis based on the stiffness determination directly from the geometric dimensions of structural members can only provide a kind of idealized theoretical estimation for the elastic response of structures. Further more, a kind of more realistc approach was developed for the determination of the structural stiffness relying on the strength and yiled deformation of structural members and the relationship between the strength eccentricity and the stiffness eccentricity was also studied. As a result, it was found that the stiffness eccentricity can not be selected randomly by researchers because it is strongly dependent on the strength eccentricity in most study cases for torsional effects of asymmetric building structures.

关 键 词：偏心结构 扭转振动 地震模拟实验 强度偏心 刚度偏心 屈服变形 

分 类 号：TU352.11[建筑科学—结构工程]