Evaluation of Flood-Resistant Capacity of Scoured Bridges
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 1
Abstract
The exposure of pier foundations owing to scour significantly reduces the foundation-bearing capacity and diminishes the flood-resistant capacity of a bridge. This paper proposes a nonlinear quasi-static analysis procedure for the performance of bridges with pile foundations under flow-induced loads for the evaluation on the flood-resistant capacity of scoured bridges. The Winkler beam model is adopted for the modeling of the pile-soil system, and the distributed hinge model is utilized to simulate the possible flexural failure of the piles. Soil springs with nonlinear curves are used to represent the nonlinearity of the supporting soil. To demonstrate this procedure, a case study on the Shuang-Yuan Bridge in Taiwan was performed for various flood and scour conditions. This bridge was partially demolished in a major flood event caused by Typhoon Morakot in 2009. According to the analysis results, a possible scenario for the failure of the Shuang-Yuan Bridge is presented, and the proposed method is shown to give a reasonable assessment of the flood-resistant capacity of bridges with scoured pile foundations.
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Acknowledgments
The authors express their gratitude for the support from China Engineering Consultants, Taiwan (CECI), and the Third District Maintenance Construction Office, Directorate General of Highways, Ministry of Transportation and Communication (MOTC), Taiwan.
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 28 • Issue 1 • February 2014
Pages: 61 - 75
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 28, 2012
Accepted: Jul 23, 2012
Published online: Jan 15, 2014
Published in print: Feb 1, 2014
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