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Seismic response of arch dams considering infinite radiation damping and joint opening effects

Liu Xinjia (刘新佳),  Xu Yanjie (徐艳杰),  Wang Guanglun (王光纶) and  Zhang Chuhan (张楚汉)

Department of Hydraulic Engineering ,Tsinghua University, Beijing 100084, China

Abstract: Effects of two important factors on earthquake response of high arch dams are considered and combined into one program. These factors are: effects of radiation damping of the infinite canyon and local non-linearity of the contraction joint opening between the dam monoliths. For modeling of rock canyon, the discrete parameters are obtained based on a curve fitting, thus allowing the nonlinear dam system to be solved in the time domain. The earthquake uniform free-field input at the dam-canyon interface is used. An engineering example is given to demonstrate the significant effects of the radiation damping on the structure response.

Keywords: arch dams; dam-canyon interaction; radiation damping; joint opening; local nonlinearity

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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.