EXPERIMENTAL AND THEORETICAL STUDY FOR ESTIMATING THE STRUCTURAL BEHAVIOR AND THE RESIDUAL CAPACITY OF REINFORCED CONCRETE SHORT COLUMNS WITH CORRODED REBARS

Abstract

Corrosion of steel reinforcement is one of the dangerous problems which may face the reinforced concrete structures and affect their durability and safety; therefore rehabilitation of the exposed elements to corrosion is a must. The present study is mainly concerned with two essential requirements for repairing short concrete columns with corroded steel reinforcement. The two main requirements are the structural behavior and the ultimate load capacity of the columns. In order to achieve this objective, eight groups of short concrete columns were tested. The eight groups reflect the main variables considered in this study, which are the degree of corrosion, concrete grade, cover thickness, reinforcement percentage and steel grade. Before loading, cracking and• spalling due to corrosion were mapped. Each column was loaded to . failure and load-deformation was monitored on the four sides of the column to detect any eccentricity ,induced by corrosion. After testing, the minimum area of corroded rebars as well as the areas at four random positions along the steel rebar were determined. Also, locations of discontinuous (cut) corroded stirrups were observed.