Flexural response of piles under liquefied soil conditions |
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| Authors: | R S Meera K Shanker P K Basudhar |
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| Institution: | (1) Civil Engineering Department, Indian Institute of Technology Kanpur, Kanpur, 208016, India |
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| Abstract: | The paper pertains to the development of a generalized procedure to analyze and predict the flexural behavior of axially and
laterally loaded pile foundations under liquefied soil conditions. Pseudo-static analysis has been carried out taking into
consideration the combined effect of axial load and lateral load. Based on the available literature effect of degradation
on the modulus of subgrade reaction due to soil liquefaction has been incorporated in the analysis. The developed program
was calibrated and validated by comparing the predicted behavior of the pile with theoretical and experimental results reported
in literature. The predicted behavior has been found to be in excellent to very good agreement with the theoretical and observed
values in the field, respectively. The present study highlights the importance of considering the axial load from the superstructure
along with the inertia forces from the superstructure and the kinematic forces from the liquefied soil in the design of pile
foundations in liquefiable areas. The significance of densification of the soil in the liquefiable areas and presence of an
adequate top non-liquefied soil cover causing appreciable reduction in deflection and bending moment experienced by the piles
has been highlighted. |
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| Keywords: | Axially and laterally loaded piles Flexural behavior Lateral spreading Liquefaction Pseudo-static analysis Soil-structure interaction Subgrade reaction |
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