Seismic Design Ground Motions and Downdrag of Pile Foundations for a Multiple-Span Bridge in Liquefiable Soils

This paper presents practical approaches for developing site-specific design seismic parameters and acceleration response spectral (ARS) curve for a bridge foundation design in liquefiable soils. A 15-span bridge, cast-in-place, prestressed box girder structure supported on Abutment 1, Bents 2 through 15, and Abutment 16 is proposed to cross a creek where alluvial soils are present to a deep depth that are susceptible to liquefaction subject to the design earthquakes. Both conventional liquefaction analysis using the industrial standard approach and a nonlinear effective-stress analysis with pore pressure generation were performed to determine liquefaction depth. A neutral plane is estimated above which the pile is subject to negative skin friction (downdrag force) and below which the pile has positive skin friction. After liquefaction depth and downdrag forces are determined, the pile lengths, axial and lateral capacities were analyzed using the industrial standard design approaches.

• Record URL:
  • https://doi.org/10.1061/47628(407)27
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784476284
• Supplemental Notes:
  • Copyright © 2012 American Society of Civil Engineers
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Zhai, Endi
  • Makarechi, Houman
• Conference:
  • GeoHunan International Conference 2011
  • Location: Hunan , China
  • Date: 2011-6-9 to 2011-6-11
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 211-218
• Monograph Title: Advances in Unsaturated Soil, Geo-Hazard, and Geo-Environmental Engineering

Subject/Index Terms

• TRT Terms: Bridge design; Earthquake resistant design; Pile foundations; Seismicity
• Uncontrolled Terms: Liquefiable soils
• Subject Areas: Bridges and other structures; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics;

Filing Info

• Accession Number: 01347878
• Record Type: Publication
• ISBN: 9780784476284
• Files: TRIS, ASCE
• Created Date: Aug 8 2011 2:22PM