Failure Mechanisms of Pile Foundations in Liquefiable Soil: Parametric Study |
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Authors: | Sumanta Haldar G. L. Sivakumar Babu |
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Affiliation: | 1Assistant Professor, Dept. of Civil Engineering, School of Infrastructure, Indian Institute of Technology, Bhubaneswar 751013, India (corresponding author). E-mail: sumanta@iitbbs.ac.in 2Associate Professor, Dept. of Civil Engineering, Geotechnical Engineering Div., Indian Institute of Science, Bangalore 560012, India. E-mail: gls@civil.iisc.ernet.in
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Abstract: | This paper presents the response of piles in liquefiable soil under seismic loads. The effects of soil, pile, and earthquake parameters on the two potential pile failure mechanisms, bending and buckling, are examined. The analysis is conducted using a two-dimensional plain strain finite difference program considering a nonlinear constitutive model for soil liquefaction, strength reduction, and pile-soil interaction. The depths of liquefaction, maximum lateral displacement, and maximum pile bending moment are obtained for concrete and steel piles for different soil relative densities, pile diameters, earthquake predominant frequencies, and peak accelerations. The potential failure mechanisms of piles identified from the parametric analysis are discussed. |
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Keywords: | Pile foundations Soil liquefaction Failures Seismic effects |
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