Lateral behavior of pile foundations during partial liquefaction

Pradeep Kumar Dammala, Mehdi Rouholamin, George Nikitas, Subhamoy Bhattacharya, Murali Krishna Adapa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Pile foundations in liquefiable soils need to be checked for the bending moments due to the liquefaction induced stresses to arrest the plastic hinge formation. Recent studies reveal that the bending moments in the pile are significantly higher during the partial liquefaction stage (excess pore water pressure ratio <1.0) than at the fully liquefied condition. This study proposes a method to estimate the pile bending moments during partial liquefaction. Advanced multi-stage cyclic triaxial tests are conducted on sandy soil to understand the partial liquefaction behavior. The test results are then utilized to model the soil pile interaction in partially liquefiable soils following the Beams on Nonlinear Winkler Foundation (BNWF) approach. The method is based on mobilized strength design concept. The developed numerical model is analyzed using the traditional lateral soil springs along with the proposed springs. It is understood from this study that the bending response of pile foundations in partially liquefiable soils can be effectively estimated with the proposed methodology compared to the existing models.
Original languageEnglish
Title of host publicationIFCEE 2018: Installation, Testing, and Analysis of Deep Foundations
EditorsMuhannad T. Suleiman, Anne Lemnitzer, Armin W. Stuedlein
PublisherAmerican Society of Civil Engineers (ASCE)
Pages301-311
Number of pages11
VolumeGSP 294
ISBN (Print)9780784481578
DOIs
Publication statusPublished - 10 Mar 2018
EventIFCEE 2018 - Orlando, United States
Duration: 5 Mar 201810 Mar 2018

Conference

ConferenceIFCEE 2018
Country/TerritoryUnited States
CityOrlando
Period5/03/1810/03/18

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