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The copyright of a submitted article is only transferred to the publishers if and when the article is accepted for publication. 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, electrostatic, mechanical, photocopying, recording or otherwise without the prior written permission of the publishers.
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Torsional Response of Self-Excited Axially Compressed Thin- Walled Box Columns
Abstract
Torsional response of self-excited axially compressed thin-walled box-columns is examined in this paper. Due to deficiency of Saint Venant's theory of torsion the basic equation of motion is derived using energy method on the basis of Vlasov's theory which allows combined treatment of pure and warping torsion. Investigation of the obtained equation reveals that torsional instability of the column is by divergence, and shear strains have significant effect on the modal frequencies of these columns and therefore must not be ignored in their dynamic analysis
