Seismic behavior of irregular RC-frames damaged by corrosion

Abstract

Reinforced concrete (RC) structures frequently are deteriorated by corrosion attack where pitting morphology is the worst form of degradation. Appropriate vulnerability analyses, accounting for the variation of mechanical properties of material during the time, give an assessment of the residual service life of corroded structures. Aim of the present paper is to evaluate any variation in the seismic behaviour of an irregular poor-designed RC frame subjected to the chloride attack. The progressive stiffness degradation and the effects of higher modes are considered in the study by means of displacement-based adaptive pushover analyses.