Numerical simulation of stress - deformed condition of cement concrete road covering

Abstract

The article is devoted to the problem of development of more exact mathematical models of deformation of road clothes of rigid type depending on a different variant of an arrangement of loading and design features of a plate.

The purpose of the work is to carry out modeling by the method of finite elements of the stress-strain state of the cement-concrete pavement of highways depending on the different load location and design features of the slab.

The object of research is cement concrete for covering roads.

Research method: statistical analysis of scientific publications, technical and normative literature, finite element method. Given the fact that the cement-concrete pavement of the highway is subject to a complex spatial load, so it is advisable to use the numerical method of determining the stress-strain state of the pavement, based on solving the equations of the theory of elasticity - finite element method.

Its feature is the direct transition from a continuous object to discrete analysis by dividing the area of ​​the object, which is studied into a number of sub-areas and approximating the fields of displacement, force, stress, for example, using an engineering complex. Four variants of transport load location are considered. As a result of the numerical simulation of the stress-strain state of the cement concrete pavement for the first time obtained an analytical dependence to determine tensile bending stresses arising in the cement concrete pavement of roads from the action of load taking into account various design parameters. taking into account the coefficient of frost resistance. This method allows to evaluate the strength of cement-concrete pavement of roads of different categories with a given reliability and durability.