The dynamic response of fluid-saturated porous materials with application to seismically induced soil liquefaction |
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| Institution: | 1. Institute of Applied Mechanics (CE), University of Stuttgart, Pfaffenwaldring 7, 70569 Stuttgart, Germany;2. Institute of General Mechanics, RWTH Aachen University, 52056 Aachen, Germany;1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;1. Key Laboratory of the Earth׳s Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Beijing Chinese Language and Culture College, Beijing 102206, China;1. Exponent, Inc., 475 14th Street, Ste. 400, Oakland, CA 94612, USA;2. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;3. Geosyntec Consultants, 2100 Main Street, Ste. 150, Huntington Beach, CA 92648, USA |
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| Abstract: | The numerical simulation of liquefaction phenomena in fluid-saturated porous materials within a continuum-mechanical framework is the aim of this contribution. This is achieved by exploiting the Theory of Porous Media (TPM) together with thermodynamically consistent elasto-viscoplastic constitutive laws. Additionally, the Finite Element Method (FEM) besides monolithic time-stepping schemes is used for the numerical treatment of the arising coupled multi-field problem. Within an isothermal and geometrically linear framework, the focus is on fully saturated biphasic materials with incompressible and immiscible phases. Thus, one is concerned with the class of volumetrically coupled problems involving a potentially strong coupling of the solid and fluid momentum balance equations and the algebraic incompressibility constraint. Applying the suggested material model, two important liquefaction-related incidents in porous media dynamics, namely the flow liquefaction and the cyclic mobility, are addressed, and a seismic soil–structure interaction problem to reveal the aforementioned two behaviors in saturated soils is introduced. |
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| Keywords: | Porous media dynamics Coupled problems Flow liquefaction Cyclic mobility Elasto-viscoplasticity TPM FEM |
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