Geo Search Co., Ltd.

Masahiko Ota

Hideaki Morita

Yoko Taki

Yukio Ozawa

Akiko Shiozawa

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

A steel deck bridge evaluation device includes a processor configured to acquire reflected response data relating to a reflected response to an electromagnetic wave irradiated through a surface of a deck in a depth direction of the deck, remove a first frequency component obtained by reflection of the electromagnetic wave at a surface of the deck and a second frequency component obtained by reflection of the electromagnetic wave at a steel deck from a reflected response frequency distribution of the reflected response expressing the reflected response data, and evaluate damage to or deterioration of the deck using a peak measurement value that is a peak value of a frequency component level corresponding to a specific frequency or higher, in the reflected response frequency distribution from which the first frequency component and the second frequency component have been removed.

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Tokyo, Japan

Masahiko Ota