Refined Stick Model for Dynamic Analysis of Skew Highway Bridges
Publication: Journal of Bridge Engineering
Volume 7, Issue 3
Abstract
Stick models are widely employed in the dynamic analysis of bridges when only approximate results are desired or when detailed models are difficult or time-consuming to construct. Although the use of stick models for regular bridges has been validated by various researchers, the application of such models to skew highway bridges continues to present challenges. The conventional single-beam stick model used to represent the bridge deck often fails to capture certain predominant vibration modes that are important in obtaining the true dynamic response of the bridge. In this paper, a refined stick model is proposed for the preliminary dynamic analysis of skew bridges. The model utilizes a dual-beam stick representation of the bridge deck. The validity of the model is established by comparing results obtained from the proposed model with numerical solutions obtained for skew plates and a skew bridge. It is shown that this dual-beam stick model is superior to the conventional single-beam model in estimating the natural vibration frequencies and in predicting the predominant vibration modes of the bridge. Because of its simplicity and relative accuracy, this model is recommended for the preliminary dynamic analysis of skew highway bridges.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 7 • Issue 3 • May 2002
Pages: 184 - 194
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Aug 27, 1999
Accepted: Aug 14, 2001
Published online: Apr 15, 2002
Published in print: May 2002
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