Liquefaction potential evaluations: energy-based method versus stress-based method

KokushoTakaji,

doi:10.1139/cgj-2012-0456

Cited by 111 publications

(31 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the energy-based liquefaction procedure offers great advantage, as mentioned here, its application is limited until now due to the fact that the basic principles and extensions of energy-based approach have not been discussed in detail with corresponding applications of stress-based liquefaction procedure. In several researches, the results obtained from the energy-based approach were compared to those of the stress-based approach under the same seismic motions, and some applications are available for actual liquefaction case histories (Kokusho, 2013;Kokusho, 2017). pointed out that the energy-based method gives similar results as the stress-based method.…”

Section: Bulletin Of the Mineral Research And Explorationmentioning

confidence: 99%

An approach for the application of energy-based liquefaction procedure using field case history data

Kayabalı

Selçuk

Beyaz

2020

Bulletin of the Mineral Research and Exploration

View full text Add to dashboard Cite

This paper presents an overview to the applicability of the "energy-based liquefaction approach" with regards to the new developments in the subject. The method involves comparing the strain energy for the soil liquefaction (capacity) with the strain energy imparted to the soil layer during an earthquake (demand). The performance of the method was evaluated by using a large database of SPT-based liquefaction case history. The energy-based method and the more commonly used stress-based method were compared in their capability to assess liquefaction potential under the same damaging historic earthquakes and geotechnical site conditions. In the procedure, the predictive strain energy equations were used to estimate the capacity energy values. These empirical equations have been developed based on the initial effective soil parameters. As for the energy of any given strong ground motion, it was computed from a velocity-time history of the ground motion and the unit mass of soil through utilization of kinetic energy concepts. The proposed energy-based method has effective way in evaluating the liquefaction potential based on the seismological parameters, contrary to the stress-based approach, where only peak ground acceleration (PGA) is considered.

show abstract

Section: Bulletin Of the Mineral Research And Explorationmentioning

confidence: 99%

An approach for the application of energy-based liquefaction procedure using field case history data

Kayabalı

Selçuk

Beyaz

2020

Bulletin of the Mineral Research and Exploration

View full text Add to dashboard Cite

show abstract

“…Sound engineering analysis of these geotechnical systems must rely on accurate simulation of cyclic soil behaviour. This is to be pursued by means of constitutive models capable of reproducing a number of fundamental features of soil response under cyclic loading, such as irreversible/plastic straining (Youd 1993;Vaid and Thomas 1995), cyclic hysteresis (Berrill and Davis 1985;Kokusho 2013) and pore water pressure build-up (Seed and Rahman 1978;Berrill and Davis 1985;Ishihara 1993;Kokusho 2013) under a wide range of initial/boundary/drainage conditions.…”

Section: Introductionmentioning

confidence: 99%

Memory-Enhanced Plasticity Modeling of Sand Behavior under Undrained Cyclic Loading

Liu

Diambra

Abell

et al. 2020

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

This work presents a critical state plasticity model for predicting the response of sands to cyclic loading. The well-known bounding surface SANISAND framework by Dafalias and Manzari (2004) is enhanced with a 'memory surface' to capture micro-mechanical, fabric-related processes directly effecting cyclic sand behaviour. The resulting model, SANISAND-MS, was recently proposed by Liu et al. (2019), and successfully applied to the simulation of drained sand ratcheting under thousands of loading cycles. Herein, novel ingredients are embedded into Liu et al. (2019)'s formulation to better capture the effects of fabric evolution history on sand stiffness and dilatancy. The new features enable remarkable accuracy in simulating undrained pore pressure build-up and cyclic mobility behaviour in medium-dense/dense sand. The performance of the upgraded SANISAND-MS is validated against experimental test results from the literature-including undrained cyclic triaxial tests at varying cyclic loading conditions and pre-cyclic consolidation histories. The proposed modelling platform will positively impact the study of relevant cyclic/dynamic problems, for instance, in the fields of earthquake and offshore geotechnics.

show abstract

“…The damping ratio is routinely calculated using the areas on a stress-strain plot underneath and enclosed by a hysteresis loop, e.g., [1,2]. Numerous energy-based methods for liquefaction assessment have been proposed [3][4][5][6][7][8][9]. Liang et al [10] describe the advantages of energy-based methods for liquefaction assessment compared to the stress-or strain-based methods respectively developed by Seed & Idriss [11] and Dobry et al [12].…”

Section: Introductionmentioning

confidence: 99%

Energy dissipation in soil samples during cyclic triaxial simulations

Keishing

Huang

Hanley

2020

Computers and Geotechnics

View full text Add to dashboard Cite

Energy terms were computed in a set of undrained cyclic triaxial discrete-element method simulations which form a parametric study of five factors: void ratio, initial mean effective stress, mean deviator stress, deviator stress amplitude and compressive/extensive initial loading. Void ratio is the only one of these factors which significantly affects the relationship between the excess pore water pressure and the unit energy dissipated (energy dissipated per unit volume). The trends in both the number of complete cycles and the unit energy up to the onset of liquefaction match experimental data. Through analysis of the micro-scale particle and contact information, a preferred contact orientation for frictional dissipation of 30-40° was found. Following a shear reversal, there is a period of negligible frictional dissipation in these simulations of around 0.04% axial strain. This explains, from an energy perspective, why many load cycles are needed to induce liquefaction if their amplitude is very small. A commonly used energy-based model to evaluate the liquefaction potential of a soil was assessed. A substantial improvement in the predictive ability of this model may be achieved by including the mean deviator stress.

show abstract

Liquefaction potential evaluations: energy-based method versus stress-based method

Abstract: A data set of undrained cyclic triaxial test for liquefaction with parametrically changing relative density and fines content is reviewed and interpreted in scope of energy. It is found that the strain amplitude or pore-pressure

Cited by 111 publications

References 18 publications

An approach for the application of energy-based liquefaction procedure using field case history data

An approach for the application of energy-based liquefaction procedure using field case history data

Memory-Enhanced Plasticity Modeling of Sand Behavior under Undrained Cyclic Loading

Energy dissipation in soil samples during cyclic triaxial simulations

Contact Info

Product

Resources

About