Numerical analysis of cap supported on ten piles: calculus of pilesreaction / Análise numérica de blocos sobre dez estacas: cálculo das reações de apoio

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Piles caps are structural elements used to transfer actions of the superstructure to a group of piles. They are found in infrastructures of bridges and buildings. The knowledge of its real structural behavior presents fundamental importance, once piles caps are structural elements that guarantee the safety of all the structure. There is no consensus yet between specialists on its real structural behavior. The traditional calculation process usually used to determine piles reaction is the superposition effect method. This method does not consider the interaction of the structural element with the type of soil where piles are supported, nor the height of the cap. With the aid of numerical analysis made in computer program based on the finite elements method (FEM), caps have been simulated varying parameters as caps height and the types where piles are supported (soil). In order to have the interaction of the structure with the soil, two types of soil have been considered: compressible soil and incompressible soil. The caps analyzed were submitted the action where centered force and moments have been considered varying its intensities. The results show that the type of pile support and the variation of cap height significantly modified the structural behavior of the cap. The most critical situation for the cap was that one considering the piles supported in soil incompressible, reaching results of pilesreactions with more than 200% of differences. The piles in the central region of the cap have been the most requested on compressible soil type. In function of the numerical analysis, we conclude that the results obtained are of great importance.

ASSUNTO(S)

pile-caps fundações reinforced concrete footing concreto armado blocos sobre estacas análise numérica numerical analysis

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