Simplified Soil Liquefaction Assessment Based on Cumulative Kinetic Energy Density: Attenuation Law and Probabilistic Analysis

Jafarian, Yaser; Vakili, Rouzbeh; Abdollahi, A. Sadeghi; Baziar, Mohammad Hassan

doi:10.1061/(asce)gm.1943-5622.0000317

Cited by 21 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Refs. [15,24,25], however, these existing methods assume that the strain energy is linearly proportional to the upward propagating kinetic energy density [26] or in the case of [27]; proportional to Arias Intensity [28]. The energy density proposed by Sarma [26] is the integral of the squared velocity multiplied by the soil density and shear wave velocity, and is a measure of the total wave energy, unlike CASE which is the work done by the wave on a point of soil as it passes through it (see Section 3.5 for further comparison).…”

Section: Estimation Of Accumulated Strain Energy At Depth Of Interestmentioning

confidence: 99%

Prediction of time of liquefaction using kinetic and strain energy

Millen

Rı́os

Quintero

et al. 2020

Soil Dynamics and Earthquake Engineering

View full text Add to dashboard Cite

The time of liquefaction triggering during a strong ground motion can have a large influence on the expected level of foundation and superstructure damage. To enable simple, yet accurate estimates of the triggering time, the build-up of pore pressure needs to be understood in terms of cumulative measures of ground motion intensity. This paper develops a theoretical framework and simple procedure to predict the build-up of excess pore pressure based on the principles of conservation of energy. The liquefaction resistance is first quantified in terms of cumulative absolute change in strain energy, which is shown through the evaluation of experimental cyclic simple shear tests to be insensitive to loading amplitude. A ground motion intensity measure is presented that uniquely calculates the cumulative absolute change in kinetic energy. This intensity measure is then used to provide an exact analytical solution for the cumulative absolute change in strain energy at any depth in a homogenous linear elastic soil deposit using the novel, nodal surface energy spectrum (NSES). A simple reduction to the NSES is proposed for viscous and nonlinear soil deposits, as well as a correction for changes in stiffness between layers of soil. The estimation of strain energy and build-up of pore pressure using the simple NSES method was applied to 500 randomly generated soil deposits using a range of different ground motions and validated against nonlinear total stress and nonlinear effective stress time-history analyses, with the NSES method providing a high level of accuracy. The proposed spectrum based solution provides an efficient and physically consistent procedure for the prediction of excess pore pressure build-up.

show abstract

Section: Estimation Of Accumulated Strain Energy At Depth Of Interestmentioning

confidence: 99%

Prediction of time of liquefaction using kinetic and strain energy

Millen

Rı́os

Quintero

et al. 2020

Soil Dynamics and Earthquake Engineering

View full text Add to dashboard Cite

show abstract

“…for 0.25 Hz ≤ f i ≤ 20 Hz, with Δf ≤ 0.05 Hz (1) where C i , f i , and Δf are the Fourier amplitude coefficient, the discrete fast Fourier transform (FFT) frequencies between 0.25 and 20 Hz, and the frequency interval used in the FFT computation, respectively. The ground-motion prediction equations (GMPEs) have been recently presented to predict IMs for design purposes (e.g., Ulusay et al, 2004;Atkinson and Boore, 2007;Campbell and Bozorgnia, 2007;Lin et al, 2011;Jafarian et al, 2014); Bastami and Soghrat, 2017;Farajpour et al, 2019). A few GMPEs have been proposed to estimate T m although it is a valuable IM for prediction of the seismic response of an engineering system.…”

Section: Introductionmentioning

confidence: 99%

Empirical model for frequency content estimation of strong ground motion records of Iran

Lashgari

Jafarian

2022

Engineering Geology

Self Cite

View full text Add to dashboard Cite

“…Zafarani and Soghrat [16] proposed an empirical prediction equation based on the peak ground acceleration (PGA) obtained in different parts of Iran. Jafarian et al [17] proposed and developed an empirical model based on regression analyses. Dong et al [18] proposed the calculation method of landslide displacement considering the deterioration effect of structural plane.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Method to Predict the Earthquake-Triggered Sliding Displacement of Slopes

Feng

et al. 2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The earthquake-induced permanent displacement is an important index of the potential damage to a slope during an earthquake. The Newmark method assumes that a slope is a rigid-plastic body, and the seismic responses of sliding masses or seismic forces along the slide plane are ignored. The decoupled method considers no relative displacement across the sliding plane, so it overpredicts the seismic response of the sliding mass. Both dynamic and sliding analyses are performed in the coupled method, but when Ts/Tm is large, the results are unconservative. In this paper, a method is proposed to predict the earthquake-triggered sliding displacement of slopes. The proposed method is based on the Newmark rigid method, coupled method, and decoupled method considering both the forces at the sliding interface and the system dynamics under critical conditions. For the flexible system, the displacements are calculated with different stiffness values, and the results show that as the stiffness increases and tends to infinity, the critical acceleration and displacements of the proposed method are close to those of the Newmark method. The proposed method is also compared with the Newmark method with the period ratio Ts/Tm. At small values of Ts/Tm, the flexible system analysis results of the displacement are more conservative than those of the rigid block model; at larger values of Ts/Tm, the rigid block model is more conservative than the flexible system.

show abstract

Simplified Soil Liquefaction Assessment Based on Cumulative Kinetic Energy Density: Attenuation Law and Probabilistic Analysis

Cited by 21 publications

References 29 publications

Prediction of time of liquefaction using kinetic and strain energy

Prediction of time of liquefaction using kinetic and strain energy

Empirical model for frequency content estimation of strong ground motion records of Iran

A Dynamic Method to Predict the Earthquake-Triggered Sliding Displacement of Slopes

Contact Info

Product

Resources

About