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Numerical Modeling of Liquefaction
https://orcid.org/http://orcid.org/0000-0002-4446-673X
https://orcid.org/http://orcid.org/0000-0002-6730-4311
The response of a saturated sand deposit to seismic motion is a very significant and challenging problem of soil dynamics, and a completely satisfactory generalized solution does not yet exist. A qualitative and quantitative prediction of the phenomena leading to permanent deformation or unacceptably high buildup of pore pressure is therefore essential to guarantee the safe behavior of engineering structures under transient consolidation and dynamic conditions. The significant approaches to model the behavior of a two-phase porous medium are usually categorized as uncoupled and coupled approaches. In the uncoupled analysis, the response of saturated soil is modeled without incorporating the interaction between soil and fluid, and then the pore pressure is accounted separately through a pore pressure generation model. In the coupled analysis, a mathematical framework is developed for computation of displacements and pore pressures at each time step. A comparison has been performed considering both approaches based on the consideration of soil non-linearity. The coupled analysis resembles closely with the liquefaction phenomena as compared to uncoupled approach. Hence, the usual decoupled and factor of safety approach may not be considered as most appropriate in the analysis of such dynamic behavior.
Numerical Modeling of Liquefaction
https://orcid.org/http://orcid.org/0000-0002-4446-673X
https://orcid.org/http://orcid.org/0000-0002-6730-4311
The response of a saturated sand deposit to seismic motion is a very significant and challenging problem of soil dynamics, and a completely satisfactory generalized solution does not yet exist. A qualitative and quantitative prediction of the phenomena leading to permanent deformation or unacceptably high buildup of pore pressure is therefore essential to guarantee the safe behavior of engineering structures under transient consolidation and dynamic conditions. The significant approaches to model the behavior of a two-phase porous medium are usually categorized as uncoupled and coupled approaches. In the uncoupled analysis, the response of saturated soil is modeled without incorporating the interaction between soil and fluid, and then the pore pressure is accounted separately through a pore pressure generation model. In the coupled analysis, a mathematical framework is developed for computation of displacements and pore pressures at each time step. A comparison has been performed considering both approaches based on the consideration of soil non-linearity. The coupled analysis resembles closely with the liquefaction phenomena as compared to uncoupled approach. Hence, the usual decoupled and factor of safety approach may not be considered as most appropriate in the analysis of such dynamic behavior.
Numerical Modeling of Liquefaction
https://orcid.org/http://orcid.org/0000-0002-4446-673X
https://orcid.org/http://orcid.org/0000-0002-6730-4311
The response of a saturated sand deposit to seismic motion is a very significant and challenging problem of soil dynamics, and a completely satisfactory generalized solution does not yet exist. A qualitative and quantitative prediction of the phenomena leading to permanent deformation or unacceptably high buildup of pore pressure is therefore essential to guarantee the safe behavior of engineering structures under transient consolidation and dynamic conditions. The significant approaches to model the behavior of a two-phase porous medium are usually categorized as uncoupled and coupled approaches. In the uncoupled analysis, the response of saturated soil is modeled without incorporating the interaction between soil and fluid, and then the pore pressure is accounted separately through a pore pressure generation model. In the coupled analysis, a mathematical framework is developed for computation of displacements and pore pressures at each time step. A comparison has been performed considering both approaches based on the consideration of soil non-linearity. The coupled analysis resembles closely with the liquefaction phenomena as compared to uncoupled approach. Hence, the usual decoupled and factor of safety approach may not be considered as most appropriate in the analysis of such dynamic behavior.
Numerical Modeling of Liquefaction
Springer Tracts in Civil Engineering
Sitharam, T. G. (editor) / Jakka, Ravi S. (editor) / Kolathayar, Sreevalsa (editor) / Kumari, Sunita (author) / Sawant, V. A. (author)
2022-08-23
17 pages
Article/Chapter (Book)
Electronic Resource
English
Numerical Modeling of Liquefaction
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