ESTABLISHMENT OF A COUPLED ANALYSIS BETWEEN STRUCTURE AND REINFORCEMENT CORROSION FOR PREDICTING DETERIORATION OF REINFORCED CONCRETE STRUCTURE BY SALT DAMAGE

Abstract

 This study is to develop an analysis method to estimate corrosion process that includes initial corrosion and onset of corrosion-induced crack in concrete. The method shall be applied to rationalize durability verification for salt-damaged RC structures. This study illustrates computing corrosion deterioration with consideration of a coupled analysis between structure and reinforcement corrosion. This article also proposes calculation method of macro-cell corrosion with consideration of macro-cell corrosion density and its allocation, focusing on cathode elements. This article validates the proposed analytical method by dry-wet cyclic tests with salt solution to simulate macro-cell corrosion. We conclude the method is accurate by confirming non-uniformity of concrete before the crack, coupled analysis of structure analysis, expansion rate of corrosion products and diffusion factor affect how corrosion start period, initial corrosion crack period and chloride ions density and corrosion amount.