A Study of the Effects of Climatic Temperature Changes on the Corrugated Structure of a Culvert of a Transportation Facility

Abstract

EN: The results of experimental studies of temperature distribution on the surface of a metal corrugated sheet are presented. It is assumed that temperature depends on two spatial variables. As a possible criterion for the selection of the desired function of temperature distribution structure minimization of the functional defined on the set of admissible functions in the form of an integral over the body region from the expression that determines the entropy production is taken. In the study of the temperature field, the differential equation of thermal conductivity is used, and the stress-strain state is the equation of the theory of thermal elasticity. The finite difference method was used to solve the differential thermal conductivity equation and the finite element method was used to solve the thermoelasticity equations. It is established that the temperature is distributed unevenly by metal corrugated sheet. There is a temperature difference between the lower and upper surfaces of the corrugated metal sheet. The temperature difference between the lower and upper surfaces of the sheet is +7.1 ° C at maximum additional ambient temperatures and –5.5 ° C at minimum negative temperatures environment. It is established that the magnitude of stresses that occurs in metal corrugated sheets from environmental temperature differences, up to 25% of the allowable stresses. Therefore, when designing metal corrugated structures, it is necessary to calculate the effect of temperature climatic influences. The obtained data of thermal stress of corrugated metal structures are important for design organizations. Since, given the effect of the temperature field on the stressn state of the structure as a whole at the design stage, it is possible to select materials in order to reduce the temperature stresses that have a direct impact on the development corrosion damage to metal pipe.