Chapter 13 Soil–structure interaction

This chapter introduces the concept of soil–structure interaction and summarises the methods available for predicting the behaviour of foundations and substructural elements constructed within a soil mass. An overview of the most frequently used soil models that are incorporated into this type of calculation are discussed, with recommendations on the appropriateness of each. The development of the structural model is also introduced. Undertaking a soil–structural analysis is a multi-disciplinary exercise and therefore effective interaction, particularly between the geotechnical and structural engineers, is key. Methods to ensure this interaction is optimised are presented in this chapter. Justification of the outcome of an analysis is discussed and is extremely important. This is carried out using case-study data where possible or by means of an independent analysis. During construction, monitoring of the structural elements that have been the subject of an analysis is highly recommended. This aids in managing the risk of unanticipated large displacements on site and provides information to aid with future soil–structural analysis.