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A semi-empirical formula for evaluating residual strain of soils under earthquake loading

Yuan Xiaoming(袁晓铭)1, Meng Shangjiu(孟上九)2,1 and Sun Rui(孙锐)1

  1. Institution of Engineering Mechanics, CSB, Harbin 150080, China

  2. Institution of Geotechnical Engineering Mechanics, Hohai University, Nanjing 210098, China

Abstract: A new semi-empirical formula for evaluating the residual strain of soils under earthquake loading is presented in this paper based on the incremental method and the increment model proposed by the authors. When the incident loading is uniform, the results calculated by the new formula are nearly the same as those by the existing formula. For excitation of the random earthquake loading, the results calculated by the new formula are compared to the results obtained by dynamic triaxial tests. The dynamic triaxial tests had been performed considering different seismic waves, confining stresses, consolidation ratios, and types of cohesive soils. The comparison between the calculated and tested results indicate that the presented formula can efficiently and practically describe the time-dependent process of the soil residual strains under actual seismic loads.

Keywords: soil; residual strain; semi-empirical formula; earthquake loading

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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.