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.

Effect of soil stiffness on seismic response of reinforced concrete buildings with shear walls

Abstract: Buildings are subjected to lateral loads caused by wind, blasting and earthquakes. The high stresses developed by these loads literally tear the building components apart, which are in general designed for gravity loads. To resist these lateral forces, shear walls can be introduced in buildings. Present study aims to determine the apt shear wall position which attracts the least earthquake forces in symmetric plan multi-storey buildings. Dynamic response of a structure is significantly influenced by the underlying soil due to its natural ability to deform. Three dimensional finite element soil–structure interaction analyses of reinforced concrete shear wall buildings with shear walls placed at various locations is carried out in time domain using scaled down Elcentro ground motion to determine the seismic response variation in the structure due to the effect of stiffness of soil. Four different soil types based on shear wave velocity and six varying shear wall positions in multi-storey buildings up to 16 storeys are considered to determine the effect of soil–structure interaction. From the study, it is found that structural response as per conventional fixed base condition is very conservative. For buildings founded on soil with Vs ≤ 300 m/s, providing the shear walls at the core is advantageous whereas for soil with Vs > 300 m/s, the shear walls placed at exterior corners of the building attracts the least earthquake force.

Predicted Behavior of Two Centrifugal Model Soil Walls

Abstract: The finite element method is used to predict the behavior of two centrifugal reinforced soil wall models, one reinforced with a geogrid, the other with a nonwoven geotextile. Comparisons between the observed and calculated behavior indicate good agreement. Sensitivity studies were also performed in order to investigate some of the uncertainties adopted in the numerical modeling. These studies show that in the geotextile‐reinforced model the effect of the intermediate layers that form part of the wrap‐back facing is significant. In the geogrid‐reinforced model, it is found that the interface shear strength between the fill and the reinforcement is an important factor, but the effects of the fill/facing interface shear strength, facing panel continuity, and location of panel connections are relatively less important. The finite element analyses also provide detailed information relating to the soil/structure interaction in these models. The results presented in this paper are considered to be useful in adva...

A finite element approach to elastic soil-structure interaction

Abstract: An application of the displacement finite element method to axisymmetric soil–structure interaction problems is described. Since the structure and foundation are analyzed as an entity, the distribution of contact pressure does not have to be assumed. The accuracy of the method is first assessed in the analysis of some simple problems to which other solutions exist. Then a series of laboratory results and one field case record, all involving flexible structures bearing on cohesionless foundations are analyzed, the foundations being treated as elastic but inhomogeneous. Both "Winkler" and elastic solid foundations are considered and it is shown that for the latter type physically reasonable distributions of the elastic modulus do not lead to very good predictions of the deflections of the structure although the deflections within the foundation itself are in agreement with observed values.

Hybrid FE Procedure for Soil‐Structure Interaction

Abstract: A stress hybrid finite element procedure is developed for nonlinear, elastic and elastic‐plastic, analysis of soil‐structure interaction including simulation of construction sequences. The procedure is compared with a number of closed‐form solutions and field problems, and provides satisfactory and improved evaluation of stresses and deformations as compared to the displacement procedure.

Validation of a three‐dimensional constitutive model for nonlinear site response and soil‐structure interaction analyses using centrifuge test data

Abstract: Summary The capability of a bounding surface plasticity model with a vanishing elastic region to capture the multiaxial dynamic hysteretic responses of soil deposits under broadband (eg, earthquake) excitations is explored by using data from centrifuge tests. The said model was proposed by Borja and Amies in 1994 (J. Geotech. Eng., 120, 6, 1051-1070), which is theoretically capable of representing nonlinear soil behavior in a multiaxial setting. This is an important capability that is required for exploring and quantifying site topography, soil stratigraphy, and kinematic effects in ground motion and soil-structure interaction analyses. Results obtained herein indicate that the model can accurately predict key response data recorded during centrifuge tests on embedded specimens—including soil pressures and bending strains for structural walls, structures' racking displacements, and surface settlements—under both low- and high-amplitude seismic input motions, which was achieved after performing only a basic material parameter calibration procedure. Comparisons are also made with results obtained using equivalent linear models and a well-known pressure-dependent multisurface plasticity model, which suggested that the present model is generally more accurate. The numerical convergence behavior of the model in nonlinear equilibrium iterations is also explored for a variety of numerical implementation and model parameter options. To facilitate broader use by researchers and practicing engineers alike, the model is implemented as a “user material” in ABAQUS Standard for implicit time stepping.