Practical solutions to soil–structure interaction problems

Abstract

Interaction of a structure and its foundation with the soil is discussed in this paper, and some of the numerical and analytical methods that have been developed for the analysis of raft and piled raft foundations are presented. It is shown that the use of simple spring models for the soil behaviour can lead to erroneous result and it is recommended that their use should be discontinued. Simple finite layer techniques are also examined, and results are compared with those of three-dimensional finite element techniques. It is shown that the finite layer techniques can yield good results for displacements in the raft and for moments induced into the piles. It is also shown that the use of thin plate theory for the raft can give good results for thick rafts and can be used for raft and piled raft analysis. The effect of including the stiffness of the superstructure in the analysis of the foundation is examined, and it is shown that the type of structure and its stiffness can have an effect on the deformation of the foundation. Finally, an analysis of an instrumented structure is carried out, and it is shown that reasonably good predictions of the behaviour of the foundation can be made through the use of soil-structure interaction theory and finite layer techniques.

Superstructure–foundation interaction in multi-objective pile group optimization considering settlement response

“…The characteristics of the superstructure can play a crucial role in the overall structure and foundation performance (Small 2001;Poulos 2016), and the main objective of this study is to investigate such effects in pile optimization considerations. In the current study, the superstructure stiffness is incorporated into the piled raft foundation analyses through the matrix condensation method.…”

Time domain simulation of soil–foundation–structure interaction in non‐uniform soils

“…Gazetas and Mylonakis [9] and Mylonakis et al [10] emphasized importance of proper SSI analysis on response of bridges and provided important insight on failure of Hanshin Expressway bridge during Kobe earthquake. Small [11] developed SSI models showing how use of simple spring models for the soil behavior could lead to erroneous result and recommended that their use should be discontinued. In addition to that, they showed that the type of structure and its stiffness could have an effect on the deformation of the foundation.…”