Dynamic Responses of Secondary Systems in Base-Isolated Buildings by Response Spectrum Analysis

• Main Authors: Hsin-Tung Chen, 陳信童
• Other Authors: 田堯彰
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/70227008237942622135

碩士 === 國立臺灣大學 === 土木工程學研究所 === 94 === This paper utilizes complex modal analysis technique to deal with a non-proportional damping composite system, which consists of a primary and a secondary systems. The outcome is presented by a response spectrum which is more convenient in the application of design. The interaction, tuning and non-classical damping between sub-systems must be taken into account in the structural analysis of a composite system. In addition, when the structures contain eccentricity, the torsional effect has to be evaluated in the analytical model. The present study obtains the modal characteristics of the composite system by simple modified method and general modified method. These methods offer a less numerical labor than the ordinary one. In regard to a base-isolated composite system, the study focuses on each individual sub-system and modifies the modal shapes by two phases. First, a system involving only the primary structure and its base isolation is analyzed. Then, it goes to the modification of the whole system which includes the secondary system. By using so, the analytical complexity is reduced substantially.