INFLUENCE OF AXIAL LOAD POSITION ON THE STRESS-STRAIN STATE OF CONCRETE SLAB OF RIGID PAVEMENT

Abstract. The article is devoted to the analysis of the stress-strain state of a rigid pavement structure, arranged on a multilayer basis, depending on various options for the location of the axial transport load and the design features of the concrete layer. The purpose of the work is to carry out finite element modeling of the stress-strain state of a concrete pavement of a highway, which is arranged on a multilayer basis and contains expansion joints between the plates, depending on various options for the location of the load relative to the expansion joints and structural features of the concrete pavement, such as its modulus of elasticity and thickness. The object of study is concrete slab for road pavement. Research method: statistical analysis of scientific publications, technical and regulatory literature, numerical calculation using the finite element method. Considering that a complex spatial load acts on the concrete pavement of a highway, it is advisable to use a numerical method for determining the stress-strain state of a pavement based on solving the equations of elasticity theory - the finite element method as the most universal and effective. Its feature is a direct transition from a continuous object to a discrete analysis by dividing the area of the object under study into a number of subareas and approximating the fields of displacements, forces, stresses, for example, using an engineering and calculation complex. Three options for the location of transport loading are considered. As a result of the performed numerical modeling, the analysis of the stress-strain state of the cement concrete pavement was carried out, taking into account various design parameters, which makes it possible to establish the areas of stress concentration and predict the nature of the destruction of the cement concrete pavement. Key words: automobile road, concrete covering, transport loads, stress fields, stress-strain state.