Master's Dissertation
DOI
10.11606/D.18.2018.tde-04052018-161901
Document
Author
Full name
Angelo Vieira Mendonça
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1997
Supervisor
Committee
Paiva, João Batista de (President)
Palermo Junior, Leandro
Venturini, Wilson Sergio
Title in Portuguese
Análise da interação placa-estaca-solo via combinação do Método dos Elementos Finitos com o Método dos Elementos de Contorno
Keywords in Portuguese
Estacas flexíveis
Interação placa-estaca-solo
Método dos Elementos de Contorno
Método dos Elementos Finitos
Abstract in Portuguese
Title in English
Analysis of the plate-pile-soil interactions by combination of the Finite and Boundary Element Method
Keywords in English
Boundary Element Method
Finite Element Method
Flexible piles
Plate-pile-soil interactions
Abstract in English
This work presents a hybrid Finite Element/Boundary Element formulation for the analysis of plate-pile-soil interactions problems. In this formulation the plate is modeled by finite elements using DKT (Discrete Kirchhoff Theory) and HSM (Hybrid Stress Model) elements and the soil is modeled as an elastic half space by the boundary element method. The pile is represented by only one element, with 3 nodal points, and shear force along the pile is approximated by a second degree polynomial. The pile-tip stress is assumed to be constant over the cross-section and a further nodal point is located there. The interface plate-soil is divided in a triangular boundary elements mesh coincident with that used in the finite element of the plate and the subgrade traction is assumed to vary linearly across each element. The subgrade tractions are eliminated from the two system of equation obtained with FEM and BEM resulting in the governing system of equation for plate-pile-soil interactions problems. By solving this set of equations the nodal displacements, the load on the piles and the subgrade tractions are calculated. Besides, this formulation allows also analysis several piles groups with and without ground-contacting rigid and flexible caps. Numerical results are presented for plate-soil, pile-soil and plate-pile-soil interactions. In all the results agree closely with those from much more elaborate analysis.

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Publishing Date
2018-05-04

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