Abstract—A piled raft foundation is a combination of a shallow foundation and a deep foundation with the best characteristics of each of its components. The piled raft foundation is a composite construction consisting of three bearing elements, piles, raft and subsoil. Unlike the traditional design of foundation where the load is carried either by the raft or by the piles, in the design of a piled raft foundation the load share between the piles and the raft is taken into account. In this foundation the piles usually are not required to ensure the overall stability of the foundation but to reduce the magnitude of settlements, differential settlements and the resulting tilting of the building and guarantee the satisfactory performance of the foundation system. The bearing behaviour of a piled raft foundation during earthquake is characterized by complex soil-structure interactions (Katzenbach et al. 1998). The modelling of these interactions requires a reliable and powerful analysis tool, such as the Finite Element Method in combination with a realistic constitutive law. As the inclusion of study of soil structure interaction is very important in case of high rise building, in this paper an attempt is made to study the behaviour of 25 storey building resting on different types of subsoil with piled raft foundation system during earthquake.

Index Terms—Dense sand, Settlement control, Soil structure interaction

Cite: Shukla S. J., Desai A. K., and Solanki C. H., "A Dynamic Behavioural Study of 25 Storey Building with Piled Raft Foundation with Variable Subsoils," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 1, pp. 119-130, February 2013.