Study of the influence of a corrosive environment on long-term fatigue of steel sewer structures

Abstract

In the work, experimental studies of long-term fatigue (strength) of steel structures of sewerage underground structures were carried out. It was established that the long-term fatigue (strength) of steel structures of sewerage underground structures significantly decreases during long-term operation (especially when exceeding the term of 20 years or more) in chemically aggressive environments domestic and economic waste, which often leads to corrosion and mechanical destruction. It is shown that in the course of a long period of operation, the indicators of long-term fatigue of reinforcing steel rods of reinforced concrete structures are significantly reduced, which causes the formation of cracks in the "reinforcement-concrete" connection, which leads, as a rule, to the destruction of reinforced concrete pipes and structures in general.