Seismic performance and design of bridge foundations in liquefiable ground with a frozen crust : [summary].

Details

• Creators:
  Yang, Zhaohui ; Zhang, Xiaoyu
• Corporate Creators:
  University of Alaska Anchorage. School of Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge foundations
  • Frozen soils
  • Earthquake engineering
  • Foundation engineering
  • Shaking table test
  • Finite element method
  • Pile foundations
  • Liquefaction
  • Seismicity
• Publication/ Report Number:
  FHWA-AK-RD-12-19 ; INE/AUTC 12.33
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alaska
• Corporate Publisher:
  Alaska University Transportation Center ; Alaska. Dept. of Transportation and Public Facilities
• Abstract:
  Two major earthquakes in Alaska, namely 1964 Great Alaskan earthquake and 2002 Denali earthquake, occurred in winter season when the ground crust was frozen. ; None of the then-existing foundation types was able to withstand the force from the frozen crust overlying liquefied soils. This project aims to study how the frozen ; ground crust affects the performance of bridge pile foundations and how one can estimate the loads imposed by the frozen ground crust. A shake table experiment was ; conducted to gain in-depth understanding of the mechanism of frozen ground crust-pile foundation interaction and collect data to validate a solid-fluid coupled finite ; element (FE) model and a simplified method, i.e. the beam-on-nonlinear-Winkler-foundation (BNWF) or p-y approach. Loads imposed on pile foundations by the frozen ; crust were studied through solid-fluid coupled FE analyses of a typical Alaskan bridge foundation under two soil conditions‒one with an unfrozen crust and the other with ; a frozen crust‒and by comparison of results obtained from these two cases. The effectiveness of the p-y approach in predicting the response of piles subject to frozen ; ground lateral spreading in liquefiable soils was evaluated by comparing the analyses of results with those obtained from the FE modeling. Finally, guidelines were ; proposed for design practitioners to analyze the performance of pile foundations embedded in liquefiable soils subject to frozen ground crust lateral spreading with the p-y ; approach.
• Format:
  PDF
• Funding:
  DTRT06-G-0011 ; AUTC#309010/410015
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27177/dot_27177_DS1.pdf
• File Type:
  [PDF - 238.06 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:01169f090cde480bfcaf9e0ab9feb1be74aafe87d0cd39bb9151b5683a7fa3c0