Abstract
The problem of ring foundation under uniform load or different point loads are a very common one in practice. The resulting independent degrees of freedom for thin depth ring members are the deflection and the twisting angle at any section in the ring. The governing equations for bending of ring members resting on Winkler foundation which derived by the previous researcher are solved in this research using finite differences. Also, finite element methods are used to model the problem by using two-dimensional and three-dimensional elements and spring elements to model the soil. The behaviour under point and distributed loads are investigated and compared with previous analytical results and good agreements were obtained. This study revealed that the maximum deflection decreased by 86% when the loading changed from point to uniformly distributed. Also, when the subgrade reaction was increased from (1.7 to 6 MPa), the maximum deflection decreased by 72% and the maximum moment decreased by 31%.
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