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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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Journal ArticleDOI
01 Mar 2006
TL;DR: In this paper, a multibody model of wind turbine towers with the consideration of soil-structure interaction (SSI) is proposed to investigate their dynamic responses to seismic excitations in time domain.
Abstract: In this paper, a multibody model of wind turbine towers with the consideration of soil—structure interaction (SSI) is proposed to investigate their dynamic responses to seismic excitations in time domain. Using joint beam elements, the elastic tower is discretized into many rigid bodies coupled elastically by constraint joints and springs. The SSI is represented by a frequency-independent discrete parameter model approximately. The governing motion equations are derived by the application of Lagrange formalism including Lagrange multipliers. To investigate the effects of SSI and the dynamic behaviour of wind turbine towers under aerodynamic loading and earthquake loading, the tower of a large wind turbine is modelled and simulated with recorded seismic excitations.

75 citations

Journal ArticleDOI
TL;DR: In this article, the kinematic seismic interaction of single piles embedded in soil deposits is evaluated by focusing the attention on the bending moments induced by the transient motion, which is performed by modeling the pile like an Euler-Bernoulli beam embedded in a layered Winkler type medium.

74 citations

Journal ArticleDOI
01 Jul 2009
TL;DR: In this article, the authors investigate the generation and propagation of ground vibrations induced by railway traffic, more specifically in the case of urban vehicles, using an uncoupled approach: the vehicle-track subsystem is first simulated to provide the ground forces which, in turn, are applied to the model of the soil.
Abstract: The aim of this study is to investigate the generation and propagation of ground vibrations induced by railway traffic, more specifically in the case of urban vehicles. The complete vehicle–track–soil model is developed according to an uncoupled approach: the vehicle–track subsystem is first simulated so as to provide the ground forces which, in turn, are applied to the model of the soil. The vehicle–track model is built with the help of the home-made C++ library EasyDyn, dedicated to the simulation of mechanical systems and multi-body applications. The 3-D model of the soil is developed under the commercial finite element code ABAQUS. It consists of a half-sphere of classical elements surrounded by infinite elements in order to account for the unbounded nature of the ground. A particular procedure has been developed in order to properly mesh the domain, especially at the transition between finite and infinite elements. Special care is also taken on conditions with respect to the minimal size of the domain and the maximal element size. On the contrary of the approaches classically found in the literature, the simulation is performed in time domain in place of frequency domain. This choice appears to be more appropriate and more natural in the case of vibrations induced by localized discontinuities of the track, due to the transient nature of the process. Moreover, it is shown that conditions on the domain size can be relieved in the time domain without loss of accuracy. The approach is illustrated by the practical case of vibrations generated by a tramway coming up against rail discontinuities.The vibratory levels obtained with the finite–infinite model of the soil show a good agreement with experimental results.

74 citations

Journal ArticleDOI
TL;DR: In this paper, a simple approach is proposed from which the pullout friction can be estimated from the direct shear coefficient of friction between soil and reinforcement and the friction angle and dilatancy angle of the soil.
Abstract: An important design parameter of reinforced soil structures is the friction mobilized between the soil and reinforcement elements, i.e., the pullout friction. The most commonly adopted method to identify this friction is a special test setup, i.e., the pullout test. Compared to the results of the pullout test, the direct shear test gives much smaller values. In this paper the mechanism of interaction between a soil and rigid planar as well as nail reinforcement is investigated. It is found that the mobilized friction between soil and reinforcement is influenced by the elastic parameters of the soil and its dilatancy angle. A simple approach is proposed from which the pullout friction can be estimated from the direct shear coefficient of friction between soil and reinforcement and the friction angle and dilatancy angle of the soil, all of which can be determined by direct shear tests. The results of the proposed model are in good agreement with results of pullout tests from the literature.

73 citations

Journal ArticleDOI
TL;DR: In this paper, a new numerical procedure is proposed for the analysis of three-dimensional dynamic soil-structure interaction in the time domain, where the soil is modelled as a linear elastic solid, however, the methods developed can be adapted to include the effects of soil nonlinearities and hysteretic damping in the soil.
Abstract: A new numerical procedure is proposed for the analysis of three-dimensional dynamic soil-structure interaction in the time domain. In this study, the soil is modelled as a linear elastic solid, however, the methods developed can be adapted to include the effects of soil non-linearities and hysteretic damping in the soil. A substructure method, in which the unbounded soil is modelled by the scaled boundary finite-element method, is used and the structure is modelled by 8-21 variable-number-node three-dimensional isoparametric or subparametric hexahedral curvilinear elements. Approximations in both time and space, which lead to efficient schemes for calculation of the acceleration unit-impulse response matrix, are proposed for the scaled boundary finite-element method resulting in significant reduction in computational effort with little loss of accuracy. The approximations also lead to a very efficient scheme for evaluation of convolution integrals in the calculation of soil-structure interaction forces. The approximations proposed in this paper are also applicable to the boundary element method. These approximations result in an improvement over current methods. A three-dimensional Dynamic Soil-Structure Interaction Analysis program (DSSIA-3D) is developed, and seismic excitations (S-waves, P-waves, and surface waves) and externally applied transient loadings can be considered in analysis. The computer program developed can be used in the analysis of three-dimensional dynamic soil-structure interaction as well as in the analysis of wave scattering and diffraction by three-dimensional surface irregularities. The scattering and diffraction of seismic waves (P-, S-, and Rayleigh waves) by various three-dimensional surface irregularities are studied in detail, and the numerical results obtained are in good agreement with those given by other authors. Numerical studies show that thc new procedure is suitable and very efficient for problems which involve low frequencies of interest for earthquake engineering.

73 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202378
2022179
2021209
2020174
2019182
2018190