Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on Settlement Behaviour of Annular Raft Foundation using Finite Element–Boundary Element Method
In this paper, numerical computation using coupled finite element–boundary element (FE-BE) technique has been carried out for determination of elastic settlement of annular raft resting on elastic half-space. In the present study, annular raft has been idealised as a flexible plate and is discretised into plate finite element. However, the foundation soil has been considered as homogeneous isotropic elastic half-space and is discretised into soil boundary element. Plate stiffness matrix has been obtained using the finite element method based on Mindlin’s thick plate theory. Mindlin’s half-space solution has also been used as a fundamental solution to find the soil flexibility matrix by the boundary element method. Coupling of soil-foundation system has been performed by transforming boundary element matrix and then adding it to plate stiffness matrix using equilibrium equation and compatibility condition. In the present study, influence of various factors on elastic settlement of the raft has been analysed in terms of ring size, depth of embedment, raft thickness and soil’s Poisson’s ratio. A generic equation has also been developed incorporating these results for determination of elastic settlement. Sensitivity analysis of the proposed equation has also been done using various statistical methods.
Study on Settlement Behaviour of Annular Raft Foundation using Finite Element–Boundary Element Method
In this paper, numerical computation using coupled finite element–boundary element (FE-BE) technique has been carried out for determination of elastic settlement of annular raft resting on elastic half-space. In the present study, annular raft has been idealised as a flexible plate and is discretised into plate finite element. However, the foundation soil has been considered as homogeneous isotropic elastic half-space and is discretised into soil boundary element. Plate stiffness matrix has been obtained using the finite element method based on Mindlin’s thick plate theory. Mindlin’s half-space solution has also been used as a fundamental solution to find the soil flexibility matrix by the boundary element method. Coupling of soil-foundation system has been performed by transforming boundary element matrix and then adding it to plate stiffness matrix using equilibrium equation and compatibility condition. In the present study, influence of various factors on elastic settlement of the raft has been analysed in terms of ring size, depth of embedment, raft thickness and soil’s Poisson’s ratio. A generic equation has also been developed incorporating these results for determination of elastic settlement. Sensitivity analysis of the proposed equation has also been done using various statistical methods.
Study on Settlement Behaviour of Annular Raft Foundation using Finite Element–Boundary Element Method
Iran J Sci Technol Trans Civ Eng
Shiuly, Amit (Autor:in) / Roy, Supriya (Autor:in)
01.09.2021
17 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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