Stress-strain state model of split-level foundation of multi-storey building on a slope (Tomsk)

   Purpose: The aim of the work is to provide a computational justification for the correct use of the linear/nonlinear deformation model of split-level foundation and criteria for transition to a pile foundation in a multi-storey building on a slope.

   Methodology: The finite-element model of stress-strain state of slab and pile foundations of the multi-storey building on a slope is developed by using MicroFe software package.

   Research findings: In calculating the split-level foundation using the Mohr-Coulomb criterion, the service limit state conditions in vertical displacements and slope are not satisfied, and it is not recommended to use the slab foundation. Thus, the slab foundation analysis with the use of only the linear deformable foundation model is insufficient. The pile operation in the presence of lateral earth pressure is characterized by the fact that the contour piles on the opposite slope side are significantly overloaded as compared with other piles. In addition, longitudinal forces of contour piles in the linear design, exceed the permissible calculated load on piles and the service limit state conditions are not thus satisfied.

   Originality: The nonlinear pile operation, when the longitudinal force in the pile is limited by the value corresponding to the permissible design load, allows the pile foundation to meet the service limit state conditions.

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