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Frontiers of Structural and Civil Engineering

Front Struc Civil Eng    2014, Vol. 8 Issue (1) : 1-18     https://doi.org/10.1007/s11709-014-0233-2
RESEARCH ARTICLE
Modeling of dynamic response of poroelastic soil layers under wave loading
Mehmet Bar?? Can üLKER()
Earthquake Engineering and Disaster Management Institute, Istanbul Technical University, Istanbul 34469, Turkey
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Abstract

In this paper, the dynamic response of saturated and layered soils under harmonic waves is modeled using the finite element method. The numerical results are then verified by corresponding analytical solutions which are also developed by the author. The equations governing the dynamics of porous media are written in their fully dynamic form and possible simplifications are introduced based on the presence of inertial terms associated with solid and fluid phases. The response variations are presented in terms of pore water pressure and shear stress distributions within the layers. It is determined that a set of non-dimensional parameters and their respective ratios as a result of layering play a major role in the dynamic response.

Keywords dynamic response of soils      coupled flow-deformation      finite elements      analytical solution      harmonic waves     
Corresponding Author(s): Can üLKER Mehmet Bar??,Email:mbulker@itu.edu.tr   
Issue Date: 05 March 2014
 Cite this article:   
Mehmet Bar?? Can üLKER. Modeling of dynamic response of poroelastic soil layers under wave loading[J]. Front Struc Civil Eng, 2014, 8(1): 1-18.
 URL:  
http://journal.hep.com.cn/fsce/EN/10.1007/s11709-014-0233-2
http://journal.hep.com.cn/fsce/EN/Y2014/V8/I1/1
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Mehmet Bar?? Can üLKER
Fig.1  Two dimensional multi-layer porous medium under harmonic load
Fig.2  Normalized pore pressure response of (a) single, (b) multi-layer soil: Finite element (FEM) and exact (analytical) solutions
Fig.3  Pore pressure response of all formulations for various . (a) = 0.1; (b) = 1, = 1 s, Π = 10, = 1, = 1
Fig.4  Pore pressure response of all formulations for various . (a) = 0.1; (b) = 1, = 0.1 s, Π = 10, = 1, = 1
Fig.5  Pore pressure response of all formulations for various R. (a) = 1 s, Π = 10; (b) = 0.1 s, Π = 10; = 10, = 1, = 1
Fig.6  Shear stress response of all formulations for various R. (a) = 0.1; (b) = 1; = 1 s, Π = 10, = 1, = 1
Fig.7  Shear stress response of all formulations for various . (a) = 0.1; (b) = 1, = 0.1 s, Π = 10, = 1, = 1
Fig.8  Shear stress response of all formulations for various R. (a) = 1 s, Π = 10; (b) = 0.1 s, Π = 10, = 10, = 1, = 1
Fig.9  Effect of layer thickness on the pore pressure response for all formulations. (a) = 1 s; (b) = 0.1 s, from Eqs. (1) to (5): = 0.81-0.16-0.054-0.0225-0.01, = 0.012-0.0625-0.184-0.44-1, = 0.11-0.25-0.43-0.67-1
Fig.10  Effect of layer thickness on the shear stress response of all formulations. (a) = 1 s; (b) = 0.1 s, from Eq. (1) to (5): = 0.81-0.16-0.054-0.0225-0.01, = 0.012-0.0625-0.184-0.44-1, = 0.11-0.25-0.43-0.67-1
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