Zhuk V. Influence of non-uniform deformation of loess collapsible soil on the frame buildings work

The object of study - interaction of the elements of the "uneven subsidence of the soil base - foundation construction - frame buildings" system, the mathematical model of nonlinear soil base. Purpose of the study - the stress-strain state of the base, foundation structures and load-bearing elements of the existing frame and the new buildings at water saturation of loess soil; the parameters of the mathematical model of the loess soil environment. Purpose - the development of the model of the "collapsible base - the foundation - aboveground part of the building," which provides accounting capabilities of local changes in the basis and guarantee the selection of the optimal design of the foundation. Methods: analysis of existing methods of nonlinear modeling in order to find the optimal algorithm solving behavior of loess base for saturating; carrying out experimental design, formulation and solution of variational problems teamwork frame building with uneven collapsible base; variation of physical and mechanical parameters in numerical modeling of collapse in order to assess their impact on the process of nonlinear deformation of loess soil; carrying out control and test calculations to check the convergence of the results of the refined model with experienced, carrying out mathematical modeling of the experimental three-dimensional problems with the proposed model and comparing the resulting stress-strain state with the natural observations. Novelty - proposed and justified a new modification of the model of nonlinear deformation of uneven collapsible loess soil environment; proposed a new computational approach: setting the maximum unfavorable working conditions of the building framework, the variational search for the "critical" soaking area in the base. Industry - construction.