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.

Obliquely incident earthquake for soil-structure interaction in layered half space

Abstract: The earthquake input is required when the soil-structure interaction (SSI) analysis is performed by the direct finite element method. In this paper, the earthquake is considered as the obliquely incident plane body wave arising from the truncated linearly elastic layered half space. An earthquake input method is developed for the time-domain three-dimensional SSI analysis. It consists of a new site response analysis method for free field and the viscous-spring artificial boundary condition for scattered field. The proposed earthquake input method can be implemented in the process of building finite element model of commercial software. It can result in the highly accurate solution by using a relatively small SSI model. The initial condition is considered for the nonlinear SSI analysis. The Daikai subway station is analyzed as an example. The effectiveness of the proposed earthquake input method is verified. The effect of the obliquely incident earthquake is studied.

Coupled Nonlinear Finite-Element Analysis of Soil-Steel Pipe Structure Interaction

Abstract: Numerical simulation of staged-construction modeling of large-diameter steel pressure pipes is accompanied by several complexities. Finite-element (FE) analysis was performed to simulate the behavior of buried steel pipes during staged-construction installation. The model deflections during the staged-construction process were verified with four different experimental soil box test results. The FE model and its associated analysis algorithm considered large deformation using total Lagrangian formulation. The material and contact nonlinear algorithms were also included in the analysis for both soil and steel pipe materials. The contact between each soil layer and soil-to-pipe was carefully implemented. Uniform thermal loading was applied to simulate the stresses induced by compaction forces on the pipe and trench walls. Finally, the vertical and lateral load-deformation plots obtained from the FE analysis results were compared with the full-scale experimental test results during the staged construc...

The elastic stability of shallow buried tubes

Abstract: Theoretical solutions exist for buried tube buckling, but the influence of the depth of burial on the critical hoop forces is not well understood. Consequently a study of shallow buried tube buckling is carried out using both analytical and numerical methods. If the ground surrounding a shallow buried tube is approximated by a circular cylinder of soil which extends to the ground surface, then it is possible to develop analytical solutions for the hoop forces which elastically destabilize the structure. Three such solutions are examined, based on both subgrade and elastic continuum representations of the soil material. A finite element solution is also examined, which yields a solution for more realistic ground support conditions. That solution is used to undertake a parametric study of the problem, where the effects of ground and structural stiffness, burial depth and distribution of hoop forces around the tube circumference are examined. A procedure is also developed which permits the straightforward es...

Explosion‐induced dynamic soil–structure interaction analysis with the coupled Godunov–variational difference approach

Abstract: The paper presents a coupled 2D Godunov–variational difference approach for soil–structure interaction due to a nearby explosion. Owing to the high-intensity dynamic loads, complex processes take place, including transient separation of the buried structure from the surrounding soil, large deformations of the buried structure including loss of stability, and so on. The approach takes into account the irreversible bulk compaction of the soil medium and is based on the relationships of the shock and rarefaction waves with finite-difference equations of the shell motion, using a simple iteration method. The model reduces the contact problem to the self-similar symmetric Riemann problem. The proposed approach is demonstrated by the solution of a buried explosion in the proximity of a lined tunnel buried in soil. The peak contact pressure envelope along the lining was studied. It was found that for an explosion in the proximity of a relatively rigid shell, the maximum value of this envelope is located at some distance from the lining's axis of symmetry. Copyright © 2008 John Wiley & Sons, Ltd.