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Seismic response control of a complex structure using multiple MR dampers: experimental investigation

Chen Jing(陈静)1,2, Xu Youlin(徐幼麟)1, Qu Weilian(瞿伟廉)3 and Wu Zhilun(吴志伦)1

  1. Research Center for Urban Hazards Mitigation, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

  2. College of Automation, Wuhan University of Technology, Wuhan 430070, China

  3. College of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China

Abstracts: This paper presents an experimental investigation on semi-active seismic response control of a multi-story building with a podium structure using multiple magnetorheological (MR) dampers manipulated by a logic control algorithm. The experiments are performed in three phases on a seismic simulator with a slender 12-story building model representing a multi-story building and a relatively stiff 3-story building model typifying a podium structure. The first phase of the investigation is to assess control performance of using three MR dampers to link the 3-story building to the 12-story building, in which seismic responses of the controlled two buildings are compared with those of the two buildings without any connection and with rigid connection. The second phase is to investigate reliability of the semi-active control system and robustness of the logic control algorithm when 2 out of 3 MR dampers fail and when the electricity supply to MR dampers is completely stopped. The last phase is to examine sensitivity of semi-active control performance of two buildings to change in ground excitation. The experimental results show that multiple MR dampers with the logic control algorithm can achieve a significant reduction in seismic responses of both buildings. The proposed semi-active control system is of high reliability and good robustness.

Keywords: experimental investigation; complex structure; multiple MR dampers; logic control; seismic response

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Copyright 2009 IEM. Journal of Earthquake Engineering and Engineering Vibration. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as described below, without written permission from the Publisher. Copying of articles is not permitted except for personal and internal use, to the extent permitted by national copyright law, or under the terms of a license issued by the National Reproduction Rights Organization of China.