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.

Numerical simulations of landslide-stabilizing piles: a remediation project in Söke, Turkey

Abstract: A catastrophic landslide following a rainy season occurred in the backyard of a school building in Soke, Turkey. The landslide caused property damage and adversely affected the present forest cover. Immediately after the landslide, double-row stabilizing piles were designed and constructed based on the findings of two-dimensional (2D) finite element (FE) analyses to take an urgent precaution. To remedy the problem, pile displacements were monitored using inclinometers, and it was observed that the measured displacements were greater than the values calculated in the design stage. Accordingly, two different three-dimensional (3D) numerical FE models were used in tandem with the inclinometer data to determine the load transfer mechanism. In the first model, numerical analyses were made to predict the pile displacements, and while the model predicted successfully the displacement of the piles constructed in the middle with reasonable accuracy, it failed for the corner piles. In the second model, the soil load transfer between piles was determined considering the sliding mass geometry, the soil arching mechanism and the group interaction between adjacent piles. The results of the second model revealed that the middle piles with large displacements transferred their loads to the corner piles with smaller displacements. The generated soil loads, perpendicular to the sliding direction, restricted pile deformations and piles with less displacement were subjected to greater loads due to the bowl-shaped landslide. A good agreement between the computed pile displacements and inclinometer data indicates that the existing soil pressure theories should be improved considering the position of the pile in the sliding mass, the depth and deformation modulus of stationary soil, the relative movement between the soil and piles and the relative movement of adjacent piles.

Soil-structure interaction effects on RC structures within a performance-based earthquake engineering framework

Abstract: Performance-based earthquake engineering (PBEE) has emerged as a powerful method of analysis and design philosophy in earthquake engineering. Structures are generally assumed to be fixed at their bases in the process of analysis and design under dynamic loading. Response of structures under earthquakes is strongly influenced by the soil-structure system. In soil-structure interaction (SSI) problems, the ability to predict the coupled behaviour of the soil and the structure is essential and requires combined soil and structure models. In the context of PBEE, this paper combines structural behaviour and seismic response analysis of SSI systems. Related to SSI analysis, several issues are studied, such as relative importance of soil parameters, and relative foundation/soil stiffness ratio, in regards to a specified aspect of the system response (e.g. response parameters). A simplified approach is proposed to consider SSI effects on the nonlinear seismic response of a reinforced concrete structure using the n...

Nonlinear response of underground rc structures under shear

Abstract: This paper presents various aspects of the kinematic nonlinear interaction of coupled RC/soil system under static and dynamic loads. Conducted are parametric studies for two types of underground structures subjected to high shear deformation transferred through the nonlinear surrounding soil. In this analysis influences of several factors, such as material nonlinearity of RC and soil, stiffness of structure and reinforcement ratio, are investigated. Failure modes, residual deformations and induced force to the RC from soil are examined for rationalized guidelines serving future improvement of the underground structural design.

Soil–structure interaction analysis in natural heterogeneous deposits using random field theory

Abstract: Inherent variability of soil properties induces inevitable sources of uncertainties in geotechnical analyses. Hence, deterministic evaluation of geostructure performance may lead to undesired unconservative outcomes which in turn may result in the system failure. In this study, a numerical simulation approach is employed to examine the influence of variation of different random soil properties on the soil–structure interaction phenomenon as well as the subgrade reaction coefficient within the shallow foundation analysis framework. Implementing Monte Carlo simulations along with the random field theory into the finite difference numerical iterations, several probabilistic analyses are performed in an undrained condition. The results of stochastic simulations illustrate the significant influence of incorporating the spatial variability of index soil properties on the response analysis of shallow foundations above heterogeneous soil strata. In particular, heterogeneity of soil layer is observed to bear a remarkable role in the evaluation of subgrade reaction coefficient. Adopting the results of numerical analysis, it is observed that as the coefficient of variation and as a result, heterogeneity of soil layers increases, the mean subgrade reaction coefficient decreases. The descending rate of mean subgrade reaction coefficient decreases as the scale of fluctuation increases and the soil behaviour tends towards the homogeneous state.