Sensitivity Analysis on Seismic Performance of Pile-Group Supported Bridges under Combined Effects of Scour and Liquefaction Hazards

ABSTRACTCharacterizing the effect of varying design parameters on the seismic performance of bridges can assist in optimum seismic design, especially for those in complex geotechnical conditions where scour and liquefaction hazards occur. This paper presents results of sensitivity analyses on the seismic performance of pile-group-supported bridges under combined effects of scour and liquefaction hazards. A fragility-based tornado diagram method is proposed for the sensitivity analyses. The studied parameters include the column height, diameter and axial compressive ratio, pile diameter and center-to-center distance, and relative densities of loose and dense sands. Special attentions are paid to the influence of scour depth on the sensitivity-ranking of the parameters. Main findings are that the pile diameter and center-to-center distance show increasing sensitivity with the increase of scour depth. These two parameters should be treated carefully in the seismic design of scoured bridges in liquefaction ground. On the contrary, relative densities of loose and dense sands that show significant influences for the scenario without scour turn to be the least sensitive parameters for scoured scenarios.

• Record URL:
  • https://doi.org/10.1061/9780784482230.015
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482230
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers 2019
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Wang, Xiaowei
  • Ye, Aijun
• Conference:
  • Structures Congress 2019
  • Location: Orlando Florida, United States
  • Date: 2019-4-24 to 2019-4-27
• Publication Date: 2019-4

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 143-153
• Monograph Title: Structures Congress 2019: Bridges, Nonbuilding and Special Structures, and Nonstructural Components

Subject/Index Terms

• TRT Terms: Bridge design; Dense soils; Earthquake resistant design; Liquefaction; Scour; Support piles
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways;

Filing Info

• Accession Number: 01723008
• Record Type: Publication
• ISBN: 9780784482230
• Files: TRIS, ASCE
• Created Date: Nov 20 2019 9:42AM