Reinforcement bar corrosion evaluation device, reinforcement bar corrosion evaluation method, and computer program

Abstract

A reinforcement bar corrosion evaluation device capable of efficiently and quantitatively evaluating a degree of corrosion of reinforcement bar in a reinforced concrete (RC) deck bridge includes: an acquisition section configured to acquire reflection response data related to a reflection response of electromagnetic waves irradiated from a surface of the reinforced concrete deck bridge in a depth direction of a deck panel, a removal section configured to remove a surface frequency component obtained by the electromagnetic waves being reflected at an asphalt concrete layer of the deck panel from a frequency distribution of a reflection response expressing the reflection response data acquired by the acquisition section, and an evaluation section configured to evaluate a degree of corrosion of the reinforcement bar in the deck panel by using a first measurement peak value in the frequency distribution of the reflection response from which the surface frequency component has been removed by the removal section, which is a peak value of a level of a frequency component of a first frequency band, and using a second measurement peak value therein, which is a peak value of a level of a frequency component of a second frequency band that is a higher frequency band than the first frequency band.