Liquefaction effects on lateral pile behavior for bridges
- Citation data:
Geotechnical Special Publication, ISSN: 0895-0563, Issue: 153, Page: 264-270
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- Engineering; Earth and Planetary Sciences; Lateral loads; Liquefaction; Piles; Soil-pile interaction; Soil-structure interaction; bridges; Lateral loads; Liquefaction; Piles; Soil-pile interaction; Soil-structure interaction; bridges; Civil Engineering
conference paper description
A coupled pile-soil-structure interaction (SPSI) analysis method is presented to study the liquefaction effects on lateral pile behavior of the highway bridges. Pile-soil interaction is simulated by the dynamic nonlinear p-y method including the effect of liquefaction. The liquefaction effects to the pile-soil interaction are taken into account by introducing a degradation multiplier to the p-y curve. The degradation multiplier is related to the excess pore water pressure buildup at the pile-soil interface. The SPSI analysis method is implemented into a Missouri highway bridge site near the New Madrid Seismic Zone (NMSZ) rift complex for future earthquake scenarios of M 7.0. Synthetic motions at rock base were developed to the bridge foundation level for SPSI analyses. Results from analysis indicate that the degradation of p-y curve due to the excess pore water pressure significantly increases displacement of superstructure and moment of pile foundation. Copyright ASCE 2006.