Topic
Soil structure interaction
About: Soil structure interaction is a research topic. Over the lifetime, 3653 publications have been published within this topic receiving 48890 citations.
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TL;DR: In this paper, the interaction between tunnelling in soft soil and adjacent piled structures is investigated, and the results of coupled analyses are compared to those obtained using the analysis of piles alone (excluding the superstructure).
Abstract: The construction of tunnels in soft ground leads to ground movements. In urban areas with soft soils, these movements can affect the safety of surface structures. This paper investigates the interaction between tunnelling in soft soil and adjacent piled structure. Several three-dimensional finite element analyses are performed to study the deformation of pile caps and piles during the construction of a nearby tunnel. Comparison between free field and coupled analyses is also presented. To simulate the tunnelling process and its effects on piled structures, one symmetric half of the soil medium, the tunnel boring machine, the face pressure, the final tunnel lining, the pile caps, and the piles are modelled in several construction phases. The first part of the paper describes the adopted numerical model. Then, pile cap movements as well as pile deformation and bending moments resulting from the tunnelling process are investigated. The influence of the superstructure stiffness and its gravity load level on the tunnelling-produced response of the pile foundation is also investigated. Finally, the results of coupled analyses, which include the superstructure, are compared to those obtained using the analysis of piles alone (excluding the superstructure). This comparison helps to evaluate the later type of analysis that is typically implemented in routine designs.
20 citations
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TL;DR: In this article, a modification of the UBCSAND soil constitutive model, one that has been shown to capture well the nonlinear shear response of soil for many stress paths, was used.
Abstract: Numerical simulations of earthquake fault rupture propagation can be used to design structures to resist damage from induced ground deformations. Several researchers have developed numerical models for analyzing the responses of soil and structures to underlying fault movement. Often, however, a relatively simple Mohr-Coulomb constitutive model that is modified to incorporate strain softening or other material nonlinearity is used. In this work, a modification of the UBCSAND soil constitutive model, one that has been shown to capture well the nonlinear shear response of soil for many stress paths, was used. The UBCSAND model was modified to add postpeak strain softening with a response that is dependent on the mode of fault rupture, a nonlinear failure envelope that is stress dependent, and a modified flow rule that is dependent on the mode of shear deformation. The numerical simulations captured well the observed trends in carefully performed geotechnical centrifuge experiments. The Modified-UBCS...
20 citations
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TL;DR: In this paper, the dynamic responses of the rigid surface foundations are solved from the wave equations by taking into account their interaction, and the solution is formulated using the frequency domain boundary element method (BEM) and Kausel-Peek Green's function for a layered stratum and the thin layer method (TLM) to account for the interaction between the two foundations.
Abstract: This paper studies the dynamic interaction for two adjacent rigid foundations embedded in a viscoelastic soil layer. The vibrations originate from one of the rigid foundations placed in the soil layer, which are subjected to harmonic loads of translation, rocking, and torsion. The dynamic responses of the rigid surface foundations are solved from the wave equations by taking into account their interaction. The solution is formulated using the frequency domain boundary element method (BEM), in conjunction with Kausel–Peek Green’s function for a layered stratum and the thin layer method (TLM) to account for the interaction between the two foundations. This approach allows us to establish a mathematical model for determining the compliance functions of the two adjacent foundations with regard to their spacing, substratum depth, masses, shapes, embedding, load intensity, and frequencies of excitation. The soil heterogeneity was taken into account for the cases of one or two layers of soils over a rigid bedrock and semi-infinite soil. The analysis of the present study indicates that the effect of several parameters on the dynamic interaction response of two adjacent foundations is nonnegligible. In particular, the dominant influence of some parameters, such as the heterogeneity of the soil, shape of the foundations, and the load intensity, compared to the other ones is clearly revealed.
20 citations
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TL;DR: In this article, a series of building-site two-dimensional finite element analysis models with different building spacings is established, considering the nonlinear characteristics of soil and structure, the static-dynamic coupled numerical simulations are conducted to study the structure-soil-structure interaction under different ground motion.
20 citations
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TL;DR: In this paper, a sensitivity study for the interaction effects of adjacent structures of nuclear power plants caused by horizontal seismic excitation has been performed, where the key structural and soil parameters for linear and for nonlinear behaviour were varied within their applicable bandwidth.
20 citations