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Antiplane SH-deformations near a surface rigid foundation above a subsurface rigid circular tunnel

V.W. Lee1 , M.E. Manoogian2 and S. Chen1

  1. Civil & Envir. Eng. Dept., Univ. of Southern California, Los Angeles, California, U.S.A.
  2. Civil Eng. & Envir. Sci. Dept., Loyola Marymount Univ., Los Angeles, California, U.S.A.

Abstract: The problem on the dynamic response of a rigid embedded foundation in the presence of an underground rigid tunnel and subjected to excitation of incident anti-plane SH waves is analyzed. By using the exact analytical solution for the two-dimensional SH-wave propagation in and around both the surface rigid foundation and subsurface rigid tunnel, those aspects of the resulting ground motions that are of special interest and importance for seismic resistant design in earthquake analyses have been examined. The computed amplitudes of the resulting periodic ground motions display a very complicated wave-interference between the surface foundation and underground tunnel that lead to observed standing wave patterns, together with abrupt changes in the wave amplitudes and large amplification of the incident motions.

Keywords: SH waves; wave-interference; embedded foundation; underground tunnel; analytical solution

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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.