Experimental Study on Mechanical Properties of Rectangular Reinforced Concrete Pipe with Corrosion Defects

Rectangular reinforced concrete pipes are widely used in various municipal projects. Because they are often located in weak strata in urban areas, they are prone to structural defects such as corrosion, which in turn leads to a decline in the bearing capacity of reinforced concrete pipes and, in severe cases, causes disasters such as pipe collapse. In this paper, the mechanical properties of rectangular reinforced concrete pipes with corrosion defects are studied through laboratory tests, and the influence of the pipe failure mechanism and corrosion depth on the ultimate bearing capacity of pipes is analyzed. A numerical simulation method is used to verify the test results, and the numerical simulation results are In good agreement with the indoor test results. The research shows that the failure mode of rectangular reinforced concrete pipe under TEB test conditions can be divided into an uncracked stage, a crack development stage and a failure stage. With the increase of corrosion depth, the ultimate bearing capacity of the pipe decreases. When the corrosion depth is equal to the thickness of the protective layer, the ultimate bearing capacity of the pipe is more than 30%, and the corrosion depth has a great influence on the mechanical properties of the pipe.