Study on permanent ground displacement induced by seismic liquefaction

Hamada, Mareomi; Towhata, Ikuo; Yasuda, Susumu; Isoyama, Ryoji

doi:10.1016/0266-352x(87)90001-2

Cited by 83 publications

(16 citation statements)

References 2 publications

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“…In the last two decades, the need for evaluating earthquake-induced settlements was recognised and as a result, some analytical and empirical relationships were developed (e.g. Hamada et al, 1987;Byrne, 1990;Bartlett & Youd, 1992;Youd et al, 2002). The vital information required for the evaluation of earthquake induced settlements is the stress-strain response of post-liquefied sands.…”

Section: Introductionmentioning

confidence: 99%

Post-liquefaction undrained monotonic behaviour of sands: experiments and DEM simulations

Sitharam¹,

Vinod²,

Ravishankar³

2009

Géotechnique

105

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This paper presents the results of a series of servo-controlled cyclic triaxial tests and numerical simulations using the three-dimensional discrete element method (DEM) on post-liquefaction undrained monotonic strength of granular materials. In a first test series, undrained monotonic tests were carried out after dissipating the excess pore water pressure developed during liquefaction. The influence of different parameters such as amplitude of axial strain, relative density and confining pressure prior to liquefaction on the post-liquefaction undrained response have been investigated. The results obtained highlight an insignificant influence of amplitude of axial strain, confining pressure and a significant influence of relative density on the post-liquefaction undrained monotonic stress–strain response. In the second series, undrained monotonic tests were carried out on similar triaxial samples without dissipating the excess pore water pressure developed during liquefaction. The results highlight that the amplitude of axial strain prior to liquefaction has a significant influence on the post-liquefaction undrained monotonic response. In addition, DEM simulations have been carried out on an assembly of spheres to simulate post-liquefaction behaviour. The simulations were very similar to the experiments with an objective to understand the behaviour of monotonic strength of liquefied samples from the grain scale. The numerical simulations using DEM have captured qualitatively all the features of the post-liquefaction undrained monotonic response in a manner similar to that of the experiments. In addition, a detailed study on the evolution of micromechanical parameters such as the average coordination number and induced anisotropic coefficients has been reported during the post-liquefaction undrained monotonic loading.

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Section: Introductionmentioning

confidence: 99%

Post-liquefaction undrained monotonic behaviour of sands: experiments and DEM simulations

Sitharam¹,

Vinod²,

Ravishankar³

2009

Géotechnique

105

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“…However, deformation, considered as a main reason for earthquake damage, is a key issue in soil dynamics research, which was confi rmed following surveys of previous earthquake damage (Hamada et al, 1987;Tohno and Shamoto, 1985;Tohno and Shamoto, 1986). Damage induced by liquefaction of soil is almost always related to large deformations (Hamada et al, 1996;Shamoto et al, 1997), thus the prediction of large post-liquefaction deformation has a very important engineering signifi cance.…”

Section: Introductionmentioning

confidence: 93%

Behavior of large post-liquefaction deformation in saturated Nanjing fine sand

Pan

Chen

Liu

et al. 2011

Earthq. Eng. Eng. Vib.

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Laboratory tests on the large post-liquefaction deformation of saturated Nanjing fi ne sand were performed by using a hollow cylinder apparatus. The stress-strain responses and the characteristics of excess pore water pressure after liquefaction were studied. It was found that the relationship between deviatoric stress and axial strain presented a sigmoid curve, and there was a good linearity relationship between normalized pore water pressure and deviatoric stress. On this basis, a constitutive model of stress-strain responses and a dissipation model of excess pore water pressure were established. It was found that the results predicted by the two models were in good agreement with the experimental data. The infl uence of relative densities and confi ning pressure on the characteristics of liquefi ed soil were studied. The results showed the relative densities and initial effective confi ning pressure all had an important infl uence on the stress-strain responses of liquefi ed saturated Nanjing fi ne sand. However, the dissipation model of excess pore water pressure after liquefaction was only affected by the confi ning pressure.

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“…As mentioned before, lateral spreading can damage the piles and deep foundations of structures [65][66][67][68][69][70][71][72][73][74][75][76][77][78]. Pile failure under lateral spreading can be due to substantial lateral movement of lique ed soil and associated lateral pressure on the piles, as well as the lateral loads exerted from non-lique able crust layer on upper section of the piles.…”

Section: Lateral Spreadingmentioning

confidence: 99%

The role of geotechnical engineering in sustainable and resilient cities

Haeri

2016

Scientia Iranica

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Geotechnical engineering is a fundamental subject in civil and environmental engineering that engineers are required to refer to when any type of retro tting, design or construction of projects and developments are encountered in a city or in a rural area. Indeed in many projects like geotechnical structures, such as earth dams, geotechnical engineering is the main subject. In this paper, the role of geotechnical engineering in sustainable and resilient cities is elaborated mainly through a series of questions and answers. Also, some related geotechnical engineering research, that is in hands in Civil Engineering Department of Sharif University, is discussed in this paper. A unique geotechnical engineering project that is designed and supervised in the city of Tehran by the author is also introduced herein to indicate how an accurate design and construction of a geotechnical structure can result in a sustainable and resilient condition. However, due to the variety of the subjects involved under the title of the paper, some of the subjects are touched brie y.

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Study on permanent ground displacement induced by seismic liquefaction

Cited by 83 publications

References 2 publications

Post-liquefaction undrained monotonic behaviour of sands: experiments and DEM simulations

Post-liquefaction undrained monotonic behaviour of sands: experiments and DEM simulations

Behavior of large post-liquefaction deformation in saturated Nanjing fine sand

The role of geotechnical engineering in sustainable and resilient cities

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