Geo Search Co., Ltd.

Yoko Taki

Hideaki Morita

Yukio Ozawa

Masahiko Ota

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.

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

An acquisition section () acquires a reflected wave intensity image in which a reflected wave intensity of an electromagnetic wave that has been radiated in a direction through a surface of a reinforced concrete structure toward an interior of the reinforced concrete structure at respective positions on the surface of the reinforced concrete structure is expressed by pixel values of pixels corresponding to each of the respective positions. A setting section () sets an evaluation target range in the acquired reflected wave intensity image. A computation section () computes a statistical indicator of a type set according to the set range for pixel values in the reflected wave intensity image. An evaluation section () evaluates a degree of deterioration of the reinforced concrete structure using the computed values.

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Tokyo, Japan

Yoko Taki