ВНУСТРІШНЬОСТРУКТУРНІ ТЕРМОНАПРУЖЕННЯ В АСФАЛЬТОБЕТОННИХ І ЦЕМЕНТОБЕТОННИХ МАТЕРІАЛАХ, ПІДСИЛЕНИХ ФІБЕРГЛАСОВОЮ, ФІБЕРКАРБОНОВОЮ, ФІБЕРБАЗАЛЬТОВОЮ ТА ФІБЕРАРАМІДНОЮ АРМАТУРОЮ

Abstract

By the methods of mathematical modeling, the internal structural thermomechanical effects that are blamed on asphalt concrete and cement concrete materials, reinforced with the fiberglass, fibercarbon, fiberbasalt and fiberara-mide strands, are investigated under conditions of change the temperature of the system. The analysis of the thermome-chanical incompatibility of the phases of the composites with the aim of establishing its influence on the values of the internal structural thermal stresses, which are attributable to these changes, is performed. It is shown that for the as-phalt concrete material the incompatibility is small and so the system internal structural thermal stresses are also small and do not exceed the values of the limit strength of the fractions of the composite material. For composites with a cement concrete matrix, the thermomechanical incompatibility of their fractions is essential and for this reason the ther-mal stresses, which are due to the temperature change, significantly exceed the values of the limit strength of the cement concrete. The established features may be used during the design of reinforced road pavements and cement concrete structures, which work under conditions of changing temperatures. Keywords: composite materials, reinforced concrete, epoxy coating, corrosion damage, thermomechanical incompati-bility, thermal stress.