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.

Effects of dynamic soil-structure interaction on seismic behaviour of high-rise buildings

Abstract: It is conventional to assume that the role of the soil-structure interaction (SSI) is beneficial to the buildings under seismic loading. However, lessons learned from recent earthquakes revealed that this assumption could be misleading, and SSI may have different effects on the seismic response of different structural systems. In this study, an enhanced soil-structure numerical model is developed and verified using ABAQUS software to assess the impact of SSI on high-rise frame-core tube structures. The seismic responses of 20, 30, and 40-storey buildings constructed on soil class Ee (according to Australian Standards) under four earthquake acceleration records have been studied. The results in terms of maximum lateral deflections, foundation rocking, inter-storey drifts and storey shear forces for the rigid base and flexible base frame-core tube structures have been discussed and compared. Generally, SSI has a remarkable impact on the seismic behaviour of high-rise frame-core tube structures since it can increase the lateral deflections and inter-storey drifts and decrease storey shear forces of structures. However, It is worth noting that the seismic responses of soil-structure systems under near and far field earthquakes are considerably different.

Nonlinear soil-structure interaction of skew highway bridges

Abstract: Presented in this report is a study of the behavior of short, skew highway bridges interacting with their surrounding soils during strong motion earthquakes. The first part of the study defines a three-dimensional, nonlinear mathematical model for the complete bridge-soil system while the second part develops the associated computer program for carrying out time-history dynamic response analysis. The mathematical model consists of (1) linear, elastic, three-dimensional solid finite elements representing backfill soils and abutment walls, (2) linear, elastic prismatic beam elements representing the bridge deck, pier columns, and pier caps, (3) nonlinear friction elements representing the discontinuous behavior of separation, impact, and slippage at the interfaces between backfills and abutment walls, and (4) discrete translational and rotational linear springs representing foundation flexibilities at the bases of supporting columns. In developing the computer program for time-history dynamic response analysis, considerable effort was spent in achieving computational efficiency. Special programming techniques including the use of matrix reduction procedures, iteration procedures, and variable time steps were used.

Earthquake response analysis in the time domain for 2D soil–structure systems using analytical frequency-dependent infinite elements

Abstract: This paper presents a time domain method for soil–structure interaction analysis under seismic excitations. It is based on the finite element formulation incorporating analytical frequency-dependent infinite elements for the far-field soil region. Equivalent earthquake input forces are calculated based on the free-field responses along the interface between the near- and far-field soil regions using the fixed exterior boundary method in the frequency domain. Then, the input forces are transformed into the time domain by using inverse Fourier transform. The dynamic stiffness matrices of the far-field soil region formulated using the analytical frequency-dependent infinite elements in the frequency domain can be easily transformed into the corresponding matrices in the time domain. Hence, the response can be analytically computed in the time domain. A recursive procedure is proposed to compute the interaction forces along the interface and the responses of the soil–structure system in the time domain. Earthquake response analyses have been carried out on a multi-layered half-space and a tunnel embedded in a layered half-space, and results are compared with those obtained by the conventional method in the frequency domain. Copyright © 2003 John Wiley & Sons, Ltd.

Numerical Study of the Seismic Behavior of Rigid Inclusions in Soft Mexico City Clay

Abstract: This article shows how seismic ground response is affected by the presence of a group of rigid inclusions embedded in deposits of soft Mexico City clay. The 3-D finite difference code FLAC3D was used to perform numerical analyses in which different configurations of inclusions were studied, including in some of them surface buildings, to incorporate important inertial effects. Results showed that inclusions, together with the surface structure, modify seismic ground response on account of soil-structure interaction.