Abstract
Evaluation methods for the reduced area ratio of rebars based on non-destructive tests are examined for RC beam specimens with two rebars having different corrosion ratios. Measurement of crack widths and ultrasonic wave velocities are applied as non-destructive tests. It is shown that the reduced area ratio of rebars can be estimated with a sufficient margin of safety even though the tests are carried out under conditions that prevent determination of the influences caused by the corrosion of the two rebars. In addition, the flexural capacity of the beam specimens is calculated by substitutions of the reduced rebar areas estimated from the tests into the formula given in the Standard Specifications for Concrete Structures of JSCE.
