Principal axes of M-DOF structures PartⅡ:Dynamic loading

作     者：Zach Liang GeorgeC.Lee 

作者机构：Department of Civil Structural and Environmental EngineeringUniversity at BuffaloState University of New YorkBuffaloNew YorkUSA Research Associate Professor Multidisciplinary Center for Earthquake Engineering ResearchUniversity at BuffaloState University of New YorkBuffaloNew YorkUSA Samuel P.Capen Professor of Engineering 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2003年第2卷第1期

页      面：39-50页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：a contract from the Federal Highway Adiministration(Contract No.ETFH61-98-C-00094) a Grant from the Earthquake Education Research Centers Program of the National Science Foundation to the Multidisciplinary Center for Earthquake Engineering Research(Grant No.EEC-9701471) 

主　　题：principal axes of M-DOF structures structural response couplings cross effect theoretical base dynamic loading peak response estimation 

摘      要：This paper is the second in a two-part series that discusses the principal axes of M-DOF structures subjected to static and dynamic *** primary purpose of this series is to understand the magnitude of the dynamie response of structures to enable better design of structures and response modification devices/*** idealized design condi- tions,the structural responses are obtained by using single directinn input ground motions in the direction of the intended response modification devices/systems,and by assuming that the responses of the structure is deconpleable in three mutual- ly perpendicular *** standard practice has been applied to both new and retrofitted structures using various seis- mic protective *** limited information is available on the effects of neglecting the impact of directional couplings (cross effects of which torsion is a component)of the dynamic response of *** order to quantify such effects,it is necessary to examine the principal axes of structures under both static and dynamic *** this twn-part series,the first paper is concerned with static loading,which provides definitions and fundamental formulations,with the conclusion that cross effects of a statically loaded M-DOF structure resulting from the lack of principal axes are of insignificant magnitude. However,under dynamic or earthquake loading,a relatively small amount of energy transferred across perpendicular direc- tions is accumulated,which may result in significant enlargement of the structural *** paper deals with a formu- lation to define the principal axes of M-DOF structures under dynamic loading and develops quantitative measures to identify cross effects resuhing from the non-existence of principal axes.