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-structure interaction on damping of structures

Abstract: Damping of structures resting on flexible foundations is affected by soil-structure interaction in two ways: (1) the structure gains damping through energy dissipation in soil, and (2) the damping the structure would have on a rigid foundation is reduced. These effects are evaluated using two approaches: an energy consideration which is a simple but approximate approach, and the complex eigenvalue analysis which is mathematically accurate but uses damped, non-classical vibration modes. These two methods are compared and the accuracy of the more convenient energy approach is assessed. Examples of modal damping are given for rigid structures, buildings and towers.

Numerical identification of soil‐structure interaction pressures

Abstract: A numerical approach is presented for the ‘identification’ (or back calculation) of the earth pressure acting on embedded or retaining structures. The procedure is applicable to structures of any shape and requires a set of in situ measurements that may include displacements of points on the structure, values of concentrated forces, values of distributed loads at some locations, etc. Possible limiting values of the unknown loads, non-linear structural behaviour, varying accuracies of the input data are accounted for in the problem formulation. Depending upon the type of problem, the solution is reached by means of the unconstrained or constrained minimization of a suitably defined error function. As an example, the proposed approach is applied to the identification of the earth pressure acting on some typical geotechnical engineering structures.

Earthquake-induced bending moment in fixed-head piles in soft clay

Abstract: This paper examines seismic effects on fixed-head, end-bearing piles installed through soft clay, using centrifuge and numerical modelling. The numerical analyses were conducted using a non-linear hysteretic, stiffness-degrading model for the clay and were validated using centrifuge data. Numerical analyses were used to extend the range of soil, pile and ground motion parameters which could not be studied in the centrifuge. Based on the centrifuge and numerical results, a framework for estimating earthquake-induced bending moments in fixed-head piles was established, which takes into account superstructural mass, ground motion and, in an approximate way, non-linear stress–strain behaviour. In this framework, pile response is sub-divided into two kinds, namely, ‘stiff' and ‘flexible', based on the notion of an active length over which significant bending moment is developed. A relationship for the active length is developed based on regression of the centrifuge and numerical data. If the pile length is sho...