Probabilistic evaluation of seismic liquefaction potential in field conditions

a kinetic energy approach

Y. Jafarian, M. H. Baziar, M. Rezania, A. A. Javadi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this paper, the peak kinetic energy density (KED) of soil particles during earthquake excitation is used as an intensity measure for the evaluation of liquefaction potential under field conditions. The paper seeks to discuss this measure. Using centrifuge tests data, it is shown that seismic pore water pressure buildup is proportional to cumulative KED at a particular soil depth. Linear relationships are found between cumulative kinetic energy and corresponding cumulative strain energy. To consider the effect of soil amplification, several equivalent linear ground response analyses are performed and the results are used to derive an equation for depth reduction factor of peak kinetic energy density. Two separate databases of liquefaction case histories are used in order to validate the proposed model. The performance of the proposed model is compared with a number of commonly used shear stress-based liquefaction assessment methods. Finally, the logistic regression method is employed to obtain probabilistic boundary curves based on the present model. Parametric study of the proposed probabilistic model is carried out to verify its agreement with the previous methods. It has been shown that the kinetic energy model works satisfactorily in classifying liquefied and non-liquefied cases compared with the existing recommendations of shear stress-based criterion. The results of the probabilistic kinetic energy model are in good agreement with those of previous studies and show a reasonable trend with respect to the variations of fines content and effective overburden pressure. The proposed model can be as used an alternative approach for assessment of liquefaction potential.
These findings make a sound basis for the development of a kinetic energy-based method for assessment of liquefaction potential.
Original languageEnglish
Pages (from-to)675-700
Number of pages26
JournalEngineering Computations
Volume28
Issue number6
DOIs
Publication statusPublished - 2011

Fingerprint

Liquefaction
Kinetic energy
Soils
Shear stress
Centrifuges
Strain energy
Amplification
Logistics
Earthquakes
Acoustic waves
Water

Keywords

  • earthquakes
  • wave
  • CPT
  • logistic regression
  • liquefaction
  • probabilistic analysis
  • dissipation
  • case history
  • model
  • kinetic energy
  • sands
  • tests
  • soil liquefaction
  • resistance

Cite this

Jafarian, Y. ; Baziar, M. H. ; Rezania, M. ; Javadi, A. A. / Probabilistic evaluation of seismic liquefaction potential in field conditions : a kinetic energy approach. In: Engineering Computations. 2011 ; Vol. 28, No. 6. pp. 675-700.
@article{7db31e767e1445ea83e6daa1395be556,
title = "Probabilistic evaluation of seismic liquefaction potential in field conditions: a kinetic energy approach",
abstract = "In this paper, the peak kinetic energy density (KED) of soil particles during earthquake excitation is used as an intensity measure for the evaluation of liquefaction potential under field conditions. The paper seeks to discuss this measure. Using centrifuge tests data, it is shown that seismic pore water pressure buildup is proportional to cumulative KED at a particular soil depth. Linear relationships are found between cumulative kinetic energy and corresponding cumulative strain energy. To consider the effect of soil amplification, several equivalent linear ground response analyses are performed and the results are used to derive an equation for depth reduction factor of peak kinetic energy density. Two separate databases of liquefaction case histories are used in order to validate the proposed model. The performance of the proposed model is compared with a number of commonly used shear stress-based liquefaction assessment methods. Finally, the logistic regression method is employed to obtain probabilistic boundary curves based on the present model. Parametric study of the proposed probabilistic model is carried out to verify its agreement with the previous methods. It has been shown that the kinetic energy model works satisfactorily in classifying liquefied and non-liquefied cases compared with the existing recommendations of shear stress-based criterion. The results of the probabilistic kinetic energy model are in good agreement with those of previous studies and show a reasonable trend with respect to the variations of fines content and effective overburden pressure. The proposed model can be as used an alternative approach for assessment of liquefaction potential.These findings make a sound basis for the development of a kinetic energy-based method for assessment of liquefaction potential.",
keywords = "earthquakes, wave, CPT, logistic regression, liquefaction, probabilistic analysis, dissipation, case history, model, kinetic energy, sands, tests, soil liquefaction, resistance",
author = "Y. Jafarian and Baziar, {M. H.} and M. Rezania and Javadi, {A. A.}",
year = "2011",
doi = "10.1108/02644401111154628",
language = "English",
volume = "28",
pages = "675--700",
journal = "Engineering Computations",
issn = "0264-4401",
publisher = "Emerald Publishing Limited",
number = "6",

}

Probabilistic evaluation of seismic liquefaction potential in field conditions : a kinetic energy approach. / Jafarian, Y.; Baziar, M. H.; Rezania, M.; Javadi, A. A.

In: Engineering Computations, Vol. 28, No. 6, 2011, p. 675-700.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Probabilistic evaluation of seismic liquefaction potential in field conditions

T2 - a kinetic energy approach

AU - Jafarian, Y.

AU - Baziar, M. H.

AU - Rezania, M.

AU - Javadi, A. A.

PY - 2011

Y1 - 2011

N2 - In this paper, the peak kinetic energy density (KED) of soil particles during earthquake excitation is used as an intensity measure for the evaluation of liquefaction potential under field conditions. The paper seeks to discuss this measure. Using centrifuge tests data, it is shown that seismic pore water pressure buildup is proportional to cumulative KED at a particular soil depth. Linear relationships are found between cumulative kinetic energy and corresponding cumulative strain energy. To consider the effect of soil amplification, several equivalent linear ground response analyses are performed and the results are used to derive an equation for depth reduction factor of peak kinetic energy density. Two separate databases of liquefaction case histories are used in order to validate the proposed model. The performance of the proposed model is compared with a number of commonly used shear stress-based liquefaction assessment methods. Finally, the logistic regression method is employed to obtain probabilistic boundary curves based on the present model. Parametric study of the proposed probabilistic model is carried out to verify its agreement with the previous methods. It has been shown that the kinetic energy model works satisfactorily in classifying liquefied and non-liquefied cases compared with the existing recommendations of shear stress-based criterion. The results of the probabilistic kinetic energy model are in good agreement with those of previous studies and show a reasonable trend with respect to the variations of fines content and effective overburden pressure. The proposed model can be as used an alternative approach for assessment of liquefaction potential.These findings make a sound basis for the development of a kinetic energy-based method for assessment of liquefaction potential.

AB - In this paper, the peak kinetic energy density (KED) of soil particles during earthquake excitation is used as an intensity measure for the evaluation of liquefaction potential under field conditions. The paper seeks to discuss this measure. Using centrifuge tests data, it is shown that seismic pore water pressure buildup is proportional to cumulative KED at a particular soil depth. Linear relationships are found between cumulative kinetic energy and corresponding cumulative strain energy. To consider the effect of soil amplification, several equivalent linear ground response analyses are performed and the results are used to derive an equation for depth reduction factor of peak kinetic energy density. Two separate databases of liquefaction case histories are used in order to validate the proposed model. The performance of the proposed model is compared with a number of commonly used shear stress-based liquefaction assessment methods. Finally, the logistic regression method is employed to obtain probabilistic boundary curves based on the present model. Parametric study of the proposed probabilistic model is carried out to verify its agreement with the previous methods. It has been shown that the kinetic energy model works satisfactorily in classifying liquefied and non-liquefied cases compared with the existing recommendations of shear stress-based criterion. The results of the probabilistic kinetic energy model are in good agreement with those of previous studies and show a reasonable trend with respect to the variations of fines content and effective overburden pressure. The proposed model can be as used an alternative approach for assessment of liquefaction potential.These findings make a sound basis for the development of a kinetic energy-based method for assessment of liquefaction potential.

KW - earthquakes

KW - wave

KW - CPT

KW - logistic regression

KW - liquefaction

KW - probabilistic analysis

KW - dissipation

KW - case history

KW - model

KW - kinetic energy

KW - sands

KW - tests

KW - soil liquefaction

KW - resistance

UR - http://www.scopus.com/inward/record.url?scp=80052211270&partnerID=8YFLogxK

U2 - 10.1108/02644401111154628

DO - 10.1108/02644401111154628

M3 - Article

VL - 28

SP - 675

EP - 700

JO - Engineering Computations

JF - Engineering Computations

SN - 0264-4401

IS - 6

ER -