Method to Compute Live-Load Distribution in Bridge Girders
Publication: Practice Periodical on Structural Design and Construction
Volume 16, Issue 4
Abstract
Live-load distribution is an important step in the analysis of bridge superstructures. This paper introduces a new framework to compute live-load distribution for bridge girders. The model uses elastic spring elements to simulate the reaction of main girders to the deck system. The cross-section frame of the superstructure is supported by these elastic springs. Live-load distribution factors are derived according to the maximum reaction of each spring element under random truck loads. Results from the proposed model are compared with those from bridge-design specifications. Engineering practice shows that this model is easy to use and provides results comparable with current design standards. The significance of this framework is that it can be used to compute live-load distribution without limits to parameters such as girder space, span length, and truck-wheel space. This research will provide a convenient tool for engineers to perform bridge design or for researchers to compare research results from other methods.
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References
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 16 • Issue 4 • November 2011
Pages: 191 - 198
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jun 14, 2010
Accepted: Nov 26, 2010
Published online: Nov 30, 2010
Published in print: Nov 1, 2011
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