Endurance Assessment of the Concrete and Reinforced Concrete Load-Bearing Structures, Impregnated by Petroleum

In many concrete and reinforced concrete elements of load-bearing structures, exposed to the frequently changing loads, accumulated fatigue damage of the material, leading to destruction. Petroleum products which impregnate concrete and reinforced concrete structures have a negative influence on their physical and mechanical properties and contribute to the formation of damages. Wherein said negative effect is largely depend on the viscosity of petroleum products. Currently available guidelines for assessing endurance of concrete and reinforced concrete elements do not fully take into account the effect of viscosity of petroleum products on their physical and mechanical characteristics. This restrains the solution of the tasks to ensure the maintenance safety conditions of industrial buildings in technological processes that use petroleum products. Based on the analysis of the test results on the endurance of concrete and reinforced concrete elements obtained an empirical formula to estimate the accumulation of fatigue depending on the number of loading cycles and the conditional viscosity impregnating of petroleum products. Represented mathematical description of the endurance assesment allows to determine the index of safety and available resources of concrete and reinforced concrete elements of load-bearing structures under the influence of various petroleum products.

safety index, concrete, petroleum products, viscosity, endurance, fatigue, industrial buildings, load-bearing capacity, load, stress, microcracks, destruction