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Quantitative approach for damage detection of reinforced concrete frames

Yoshio Kaneko , Akira Mita and Hirozo Mihashi1

  1. Dept. of Architecture & Building Science, Tohoku University, Sendai 980-8579, Japan
  2. Dept. of System Design Engineering, Keio University, Yokohama 223-8522, Japan


Abstract: The objective of this paper is to provide an analytical basis for the quantitative evaluation of a reinforced concrete structure based on vibration data obtained by using the damage detection technique. A partial reinforced concrete system of a weak beam/strong column moment frame is chosen as an example. A pushover analysis is carried out in order to numerically examine both the story shear-relative displacement characteristics and the associated damage level. In the analysis, a two dimensional nonlinear finite element analysis is employed considering several constitutive models. As a result, the degradation of the stiffness at the damaged story is characterized in association with the story relative displacement. It is also pointed out that the rotation angle of the column-base is highly correlated with the story relative displacement. Based on the analytical findings, quantitative approaches for a structural health monitoring system are suggested considering both the current sensor technologies and those available in the future.

Keywords: Nonlinear FEM analysis; structural health monitoring; reinforced concrete structure; story stiffness; rotation angle of column-base
 

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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.