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Seismic vulnerability evaluation of axially loaded steel built-up laced members I: experimental results

Kangmin Lee1 and Michel Bruneau2

  1. Department of Architectural Engineering, Chungnam National University, Korea
  2. Department of Civil, Structural, and Environmental Engineering, University at Buffalo, State University of New York, USA

Abstract: An experimental program was initiated to investigate the seismic performance of built-up laced steel brace members. Quasi-static testing of twelve typical steel built-up laced member (BLM) specimens was conducted. These were designed to span a range of parameters typically encountered for such members based on findings from a survey of commonly used shapes and details that have been historically used. The specimens were subdivided into groups of three different cross-sectional shapes, namely built-up I-shape section, and built-up box shapes buckling about the x or the y axis. Within each group, global and local buckling slenderness ratios had either kl/r values of 60 or 120, and b/t ratios of 8 or 16. The specific inelastic cyclic behavior germane to each specimen, and general observations on overall member hysteretic behavior as a function of the considered parameters, are reported. A companion paper (Lee and Bruneau 2008) investigates this observed response against predictions from analytical models, and behavior in the perspective of system performance.

Keywords: quasi-static testing; built-up laced compression member; experimental program; brace

 

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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.