ABSTRACT
In this paper a numerical model is presented that enables simulation of the nonlinear flexural response of RC components with corroded reinforcement. The model employs the force-based beam-column element and the fibre-type section model that are available in OpenSees. This model simulates the buckling of longitudinal reinforcement under cyclic loading and the impact of corrosion on buckling strength. The basic buckling steel model is validated through comparison of simulated and observed response for RC columns with uncorroded reinforcement. Typical concrete constitutive models are employed to simulate the response of components with corroded reinforcement; cover concrete strength is adjusted to account for corrosion induced damage and core concrete strength and ductility adjusted to account for corrosion induced damage to transverse reinforcement. The model is used to simulate the response of several recently tested reinforced concrete components with corroded reinforcement and to investigate the impact of corrosion on the earthquake performance of RC columns.
