Mechanical stresses and crack analysis of concrete under the hygrothermic effect

Abstract

Êëþ÷åâûå ñëîâà: áåòîí, òåïëîïåðåíîñ, èçìåíåíèå âëàaeíîñòè, ðàñòðåñêèâà-íèå.Introduction. Various environmental loadings, such as variation in the ambient temperature, fluctuation of the relative humidity, the exposure to chemically harmful substances, etc., cause the progressive deterioration of the concrete structures. The long-term durability of concrete is largely governed by the resistance of concrete to various physical and chemical processes of deterioration. The interactions between these processes of deterioration become increasingly necessary to be considered in the evaluation of durability.With the fast development of data processing, the digital simulation found an application increasingly extended by modeling various processes of deterioration [1][2][3].However, all these digital models are specific programs describing only the processes considered, which limits their application to a broad variety of applications. Moreover, the analysis of the mechanical stresses induced by the deterioration process did not become available, which makes it impossible to evaluate the influence of acceleration of cracks on the deterioration of concrete and to predict the lifespan of the concrete structure after cracking.