Abstract
Earthquakes often cause sudden increase of pore pressures in the fine grained soils leading to liquefaction. Pile foundations in liquefiable soils need to be checked for the additional bending moments caused by the liquefaction induced stresses to avoid the plastic hinge formation. Recent studies reveal that the bending moments in the pile foundation are significantly higher during the partial liquefaction (excess pore water pressure ratio <1.0) than at the fully liquefied condition. This study proposes a method to estimate the bending moments of the pile during partial liquefaction. Advanced multi-stage cyclic triaxial tests are conducted to understand the partial liquefaction behavior of the sandy soils. The test results are then utilized in obtaining the lateral soil springs to develop a numerical model of pile foundation in partially liquefiable soils. The results obtained from the numerical model match well with the shake table results manifesting the efficacy of the proposed method.
Original language | English |
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Title of host publication | Proceedings of the Indian Geotechnical Conference 2017 |
Publisher | Indian Geotechnical Society |
Number of pages | 4 |
Publication status | Published - 16 Dec 2017 |
Event | Indian Geotechnical Conference 2017 - Guwahati, India Duration: 14 Dec 2017 → 16 Dec 2017 http://www.igc2017.in/ |
Conference
Conference | Indian Geotechnical Conference 2017 |
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Country/Territory | India |
City | Guwahati |
Period | 14/12/17 → 16/12/17 |
Internet address |
Keywords
- pile foundation
- partial liquefaction
- transient bending moments
- P-Y curves