Ni Choine M., Kashani M., Lowes L., O’Connor A., Crewe L., Alexander N. and Padgett J., (2016), ‘Nonlinear Dynamic Analysis and Seismic Fragility Assessment of a Corrosion Damaged Integral Bridge’, International Journal of Structural Integrity. 7(2), pp. 227-239.
The purpose of this paper is to explore the impact of corrosion of reinforcing steel in RC columns on the seismic performance of a multi-span concrete integral bridge. A new constitutive model for corroded reinforcing steel is used. This model simulates the buckling of longitudinal reinforcement under cyclic loading and the impact of corrosion on buckling strength. Cover concrete strength is adjusted to account for corrosion induced damage and core concrete strength and ductility is adjusted to account for corrosion induced damage to transverse reinforcement. This study evaluates the impact which chloride induced corrosion of the reinforced concrete columns on the seismic fragility of the bridge. Fragility curves are developed at a various time intervals over the lifetime. The results of this study show that the bridge fragility increases significantly with corrosion.