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 simple model, describing the soil-foundation interaction for continuous wall footing, and which takes longitudinal variations in soil's properties into account, is presented in which a 1D structure (continuous spread footing) rests on a spatially variable soil, described by Winkler-type springs, characterized by the subgrade reaction coefficient.
17 citations
TL;DR: In this paper, a series of eigen analyses are conducted with and without considering soil-structure interaction (SSI) effects, and a set of new empirical equations is proposed to predict the fundamental periods of the shear-wall dominant buildings accounting the SSI effects.
Abstract: Shear-wall dominant reinforced concrete buildings constructed with tunnel-form technique are prevalently constructed in regions with high seismicity due to their ease of construction and inherent resistance to lateral forces. However, the current seismic codes and the design provisions constitute inadequate guidelines for the earthquake-resistance design of these buildings. In particular, the prediction of their fundamental periods via current empirical expressions yields not only erroneous results, but also ignores soil-structure interaction (SSI) effects. For the objective of understanding their dynamic characteristics, a series of eigen analyses is conducted with and without considering SSI effects. The soil effects on foundations are represented by linear translational and rotational winkler springs, and rigidities of the springs are computed from the foundation size and the uniform soil compressibility. An ensemble of 140 different shear-wall dominant buildings with varying heights is simulated in three-dimensions considering four different soil conditions. It is proven that the vibration periods and the mode shapes of the shear-wall dominant buildings may change depending on the different soil conditions. Based on the results of the three dimensional finite element analyses, a set of new empirical equations was proposed to predict the fundamental periods of the shear-wall dominant buildings accounting the SSI effects. Copyright © 2010 John Wiley & Sons, Ltd.
17 citations
TL;DR: In this paper, the effect of embedding on the bearing capacity, elastic stiffness, and the cyclic behaviour of square-in-plan foundations are presented. But the authors focus on the impact of the type of contact between the foundation interfaces (vertical or horizontal) with the surrounding or underlying soil.
Abstract: Results of a three-dimensional finite-element study for the effect of embedment on the undrained bearing capacity, the elastic stiffness, and the cyclic behaviour of square-in-plan foundations are presented. Uniaxial horizontal (Q) and pure-moment (M) limit loads, as well as the respective elastic stiffnesses (KHH and KMM) are obtained, and simplified models are developed to interpret the observed trends. The substantially different role of embedment in increasing elastic stiffness and in increasing ultimate loads is interpreted in simple soil mechanics terms. Extensive comparisons are made with the two-dimensional results for a strip foundation. Combined (QM) loading capacities are obtained and presented as ‘interaction’ diagrams; the significance of the vertical load (N) is also addressed. The importance of the type of contact between the foundation interfaces (vertical or horizontal) with the surrounding or underlying soil is explored. A substantial reduction in all capacities is shown when the interfa...
17 citations
Journal Article•
TL;DR: In this article, the implementation of various finite elements model which explicitly incorporates the nonlinear soil and linear structural response considering various soil constitutive models and finite element mesh is reviewed, and the authors make an effort to review the implementation and performance of these models.
Abstract: Integral Abutment Bridges (IAB) are defined as simple or multiple span bridges in which the bridge deck is cast monolithically with the abutment walls. This kind of bridges are becoming very popular due to different aspects such as good response under seismic loading, low initial costs, elimination of bearings, and less maintenance. However the main issue related to the analysis of this type of structures is dealing with soil-structure interaction of the abutment walls and the supporting piles. Various soil constitutive models have been used in studies of soil-structure interaction in this kind of structures by researchers. This paper is an effort to review the implementation of various finite elements model which explicitly incorporates the nonlinear soil and linear structural response considering various soil constitutive models and finite element mesh. Keywords—Constitutive Models, FEM, Integral Abutment Bridges, Soil-structure Interactions
17 citations
TL;DR: In this paper, a mode acceleration formulation is presented to investigate the variability in the response of a secondary system which is supported on a flexible-base primary system at multiple attachment points, where the response functions are considered to be uncertain due to uncertainties in the values of shear wave velocity and Poisson's ratio of the foundation soil.
17 citations