Liquefaction of soil presents a risk to the stability of structures in the event of an earthquake making assessment and mitigation of liquefaction a crucial activity for structures proposed on liquefiable soils (Kramer in Geotechnical earthquake engineering. Pearson Education India, 1996). The current study employs finite element analyses (OpenSeesPL) using an advanced constitutive model (PDMY03) to evaluate liquefiable depth (Qui and Elgamal in Numerical simulations of LEAP dynamic centrifuge model tests for the response of liquefiable sloping ground. Springer International Publishing, pp 521–544, 2020). The liquefiable depth is determined using excess pore pressure response to the earthquake motion applied at the base of the numerical soil column. Different relative densities and a range of peak ground accelerations are considered to conduct a parametric study. Vibro compaction is considered the liquefaction mitigation measure in this study. Results indicate an increased susceptibility to soil liquefaction with decreasing relative soil density and increasing peak ground acceleration.

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A Parametric Study for Liquefaction Assessment and Mitigation Using Vibro Compaction

  • T. Gupta,
  • M. K. Annam,
  • P. V. Vyshna,
  • V. K. Chandaluri

摘要

Liquefaction of soil presents a risk to the stability of structures in the event of an earthquake making assessment and mitigation of liquefaction a crucial activity for structures proposed on liquefiable soils (Kramer in Geotechnical earthquake engineering. Pearson Education India, 1996). The current study employs finite element analyses (OpenSeesPL) using an advanced constitutive model (PDMY03) to evaluate liquefiable depth (Qui and Elgamal in Numerical simulations of LEAP dynamic centrifuge model tests for the response of liquefiable sloping ground. Springer International Publishing, pp 521–544, 2020). The liquefiable depth is determined using excess pore pressure response to the earthquake motion applied at the base of the numerical soil column. Different relative densities and a range of peak ground accelerations are considered to conduct a parametric study. Vibro compaction is considered the liquefaction mitigation measure in this study. Results indicate an increased susceptibility to soil liquefaction with decreasing relative soil density and increasing peak ground acceleration.