Abstract
Mechanical characteristics of corroded reinforcing bars in the reinforced concrete structures are not identical with those of bars without corrosion because the cross sectional area of corroded reinforcing bars are not uniformly distributed. In this study, both the distributions of the cross sectional area of corroded reinforcing bars in actual structural members and their effects on the mechanical characteristics of the bars are investigated. Firstly, an investigation method using the replica of corroded reinforcing bar is developed, and it is clarified that this method is effective to obtain the data of the shape of the corroded reinforcing bar. Secondly, the corroded reinforcing bars in actual railway reinforced concrete structures and their replicas are measured for their dimensions by the three dimensional shape scanner. It is confirmed that the maximum reduction of cross sectional area of a bar can be estimated by using the average reduction of cross sectional area and its standard deviations. Finally, the mechanical characteristics of the corroded reinforcing bars under tensile loading test are compared with the analytical results in which the reduction of cross sectional area in each section along the bars is taken into account.
