| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 86 === This paper applies elastoplastic finite element method to
analyze the problem of ultimate bearing capacity of
strip surface footing over two-layer soils under the plane
strain assumption. Eight nodes rectangular element is adopted
and the Mohr-Coulomb failure criterion is used for
simulating the elastoplastic stress-strain behavior of soil.
Furthermore, displacement control of loading is applied.
The major pattern of the problem of ultimate bearing capacity of
two-layer soils is consisted of sandy soil overlain
clay. This paper investigates the influences of finite element
mesh, material parameter, boundary condition, and plastic flow
rule on numerical convergence, compares with the
experimental results to verify the conclusions
obtained from numerical analysis, ensures the feasibility of
numerical analysis. Finally, a non-dimensional design
chart will be established as a reference of the problem of
bearing capacity of shallow foundation.
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