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Shukla, S. J.
- Dynamic Behaviour of Structure and Foundation with Piled Raft by Time Histories Finite Element Model
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1 Applied Mechanics Department, Sardar Vallabh Bhai National Institute of Technology, Surat, Gujarat., IN
1 Applied Mechanics Department, Sardar Vallabh Bhai National Institute of Technology, Surat, Gujarat., IN
Source
International Journal of Engineering studies, Vol 5, No 1 (2013), Pagination: 91-105Abstract
A raft foundation transfers load directly on subsoil. The concept of piled raft foundation combines the pile, raft and subsoil as load bearing elements and composite structure. 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 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. Different researches have been realized investigations about the numerical modelling of piled rafts with FE analysis and different constitutive models. The present research combines the 3D modelling with a modern and realistic constitutive model. An increasing number of structures, especially tall buildings are founded on piled rafts (O'Neil et al. 1996; Katzenbach et al. 2000, Poulos 2001). For this reason, it is important to develop a methodology to study the bearing behaviour of piled rafts. In this paper author had tried to study the effect of subsoil on the dynamic behaviour of 25 storeys building with pied raft foundation during low to medium intensity earthquake. The results are generated for different height of the structure in the terms of displacement and acceleration response.Keywords
Settlement, Soil Structure Interaction, Sub Grade ReactionReferences
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