Evaluation of Flood-Resistant Capacity of Scoured Bridges

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 p-y 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.

• Record URL:
  • https://doi.org/10.1061/(ASCE)CF.1943-5509.0000381
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08873828
• Supplemental Notes:
  • SPECIAL SECTION: Performance of Bridges under Critical Natural Hazards. © 2013 American Society of Civil Engineers.
• Authors:
  • Ko, Yung-Yen
  • Chiou, Jiunn-Shyang
  • Tsai, Yu-Ching
  • Chen, Cheng-Hsing
  • Wang, Helsin
  • Wang, Chung-Yue
• Publication Date: 2014-2

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 61-75
• Serial:
  • Journal of Performance of Constructed Facilities
  • Volume: 28
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 0887-3828
  • Serial URL: http://ascelibrary.org/toc/jpcfev/27/1

Subject/Index Terms

• TRT Terms: Bearing capacity; Bridge design; Bridge foundations; Bridge piers; Case studies; Flexural strength; Flood protection; Floods; Mathematical models; Pile foundations; Scour; Structural health monitoring
• Geographic Terms: Taiwan
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01522011
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Apr 15 2014 9:08AM