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Damping characteristics of friction damped braced frame and its effectiveness in the mega-sub controlled structure system

Lian Yeda (连业达)1 , Zhang Xunan (张洵安)1 and Sheldon Cherry2

  1. College of Mechanics and Civil Engineering, Northwestern Polytechnic University, Xi’an 710072, China
  2. Department of Civil Engineering, University of British Columbia, Vancouver, Canada

Abstract: Based on energy dissipation and structural control principle, a new structural configuration, called the mega-sub controlled structure (MSCS) with friction damped braces (FDBs), is first presented. Meanwhile, to calculate the damping coefficient in the slipping state a new analytical method is proposed. The damping characteristics of one-storey friction damped braced frame (FDBF) are investigated, and the influence of the structural parameters on the energy dissipation and the practical engineering design are discussed. The nonlinear dynamic equations and the analytical model of the MSCS with FDBs are established. Three building structures with different structural configurations, which were designed with reference to the conventional mega-sub structures such as used in Tokyo City Hall, are comparatively investigated. The results illustrate that the structure presented in the paper has excellent dynamic properties and satisfactory control effectiveness.

Keywords: friction damped braces; mega-sub controlled structure; energy dissipation; vibration control; nonlinear dynamic system

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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.