Numerical studies of the redistribution of forces in statically indeterminate corrosion-damaged reinforced concrete beams
Abstract
Numerical studies of the redistribution of forces in statically indeterminate corrosion-damaged reinforced concrete beams
Incoming article date: 11.03.2023The study of statically indeterminate reinforced concrete structures at the present stage is possible with the help of software systems capable of taking into account the nonlinear work of the material, which allows us to fully assess the stress-strain state for a different redistribution of emerging forces provoked by corrosion damage to reinforcement and concrete. Numerical studies of 14 models with corrosion damage in the upper section of a two-span beam in the Ansys software package have been performed. Load-deflection graphs are presented depending on the percentage of corrosion damage. The dependences of the redistribution of tensile forces in the beam reinforcement with different percentages of corrosion damage are shown. It is established that with damages up to 10%, there is a sharp increase in the tensile forces in the span reinforcement of the beams. It is determined that with corrosion damage to the beam up to 70%, the forces in the supporting reinforcement increase to 10%.
Keywords: reinforced concrete beam, redistribution of forces, plastic hinge, corrosion of reinforced concrete, numerical calculation, bearing capacity