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 article, a computationally efficient modeling approach of including the dynamic soil-structure interaction into aeroelastic codes is presented with focus on monopile foundations, where semi-analytical frequency-domain solutions are applied to evaluate the dynamic impedance functions of the soil-pile system at a number of discrete frequencies.
80 citations
TL;DR: In this paper, the authors present an elastic study of tunnel-pile-structure interaction through Winkler-based two-stage analysis methods (TSAMs), focusing on structural displacements resulting from tunnel excavation beneath piled frames or simple equivalent beams.
80 citations
TL;DR: In this paper, a series of shaking table tests were performed on a scaled utility tunnel model to explore its performance under earthquake excitation, and the results from the test program were compared with experiment measurements in terms of displacement, acceleration and amplification factor of the structural model and the soil.
Abstract: Underground utility tunnels are widely used in urban areas throughout the world for lifeline networks due to their easy maintenance and environmental protection capabilities However, knowledge about their seismic performance is still quite limited and seismic design procedures are not included in current design codes This paper describes a series of shaking table tests the authors performed on a scaled utility tunnel model to explore its performance under earthquake excitation Details of the experimental setup are first presented focusing on aspects such as the design of the soil container, scaled structural model, sensor array arrangement and test procedure The main observations from the test program, including structural response, soil response, soil-structure interaction and earth pressure, are summarized and discussed Further, a finite element model (FEM) of the test utility tunnel is established where the nonlinear soil properties are modeled by the Drucker-Prager constitutive model; the master-slave surface mechanism is employed to simulate the soil-structure dynamic interaction; and the confining effect of the laminar shear box to soil is considered by proper boundary modeling The results from the numerical model are compared with experiment measurements in terms of displacement, acceleration and amplification factor of the structural model and the soil The comparison shows that the numerical results match the experimental measurements quite well The validated numerical model can be adopted for further analysis
80 citations
TL;DR: In this paper, a finite-element code was developed in MATLAB to model three-dimensional soil-pile-structure systems and frequency dependent Kelvin elements (spring and dashpots) were used to model the radiation boundary conditions.
Abstract: Nonlinearity of the soil medium plays a very important role on the seismic behavior of soil-pile-structure interaction. The problem of soil-pile-structure interaction is further complicated when the piles are embedded in liquefiable soil medium. A finite-element code was developed in MATLAB to model three-dimensional soil-pile-structure systems. Frequency dependent Kelvin elements (spring and dashpots) were used to model the radiation boundary conditions. A work-hardening plastic cap model was used for constitutive modeling of the soil medium. The pore pressure generation for liquefaction was incorporated by a two-parameter volume change model reported in the literature. In this paper, a 2×2 pile group in liquefiable soil is considered and a parametric study is conducted to investigate its seismic behavior. The effects of loading intensity and stiffness of the soil on the seismic behaviour of the soil-pile system are investigated, considering nonlinearity and liquefaction of the soil medium for a wide ran...
80 citations