Abstract
This paper deals with the design of a five-storey hospital building, in which we focus on the deterministic and probabilistic analysis of its slab foundation. The hospital building bearing structure was modeled as a reinforced concrete skeleton. The Boussinesque model was selected for the subsoil under the plate foundation, which was a model of the elastic half-space, where properties of individual layers of the subsoil were entered according to the geological survey. The geological topology consisted of clay gravel and also included a layer of clay sand. In the stochastic solution, the variance of values was considered for individual mechanical properties of different types of soil. We analyzed the influence of the variance of input values on the resulting deflections, strain, and stress state of the plate foundation. Two variants of the solution were considered on the given numerical example. Probability calculations confirmed the probability of failure, which was allowed for the second limit state.
Highlights
This paper deals with the base plate under a hospital building
The analyzed foundation structure provided us with new knowledge for further improvements, which we can apply in this stochastic analysis of contact tasks of foundation structures and elastic subsoil
The variability of the input parameters was considered according to the requirements of the Eurocode
Summary
This paper deals with the base plate under a hospital building. It is a reinforced concrete slab that is 500 mm thick, which lies on a layered subsoil. The mathematical formulation of the contact problem of the slab and the subsoil, elastic half-space, was described by differential equations. Because three-dimensional (3D) finite elements are needed to describe an elastic half-space using FEM, we chose the ANSYS system to solve the examples of subsoil slabs. In this solution, where we modeled the elastic half-space as a block of sufficiently large dimensions, the height of a block had an effect in the solution of the problem. This was the depth at which the block, representing the earth body, was supported and was prevented from the vertical displacement. Many software programs can evaluate the safety of a structure or its failure, based on
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