Non-destructive testing for steel columns corroded on concrete boundary

Kana Yokote, Minoru Takahashi, Jun Murakoshi, Motoyuki Suzuki, Hideki Naito

研究成果: 書籍の章/レポート/Proceedings会議への寄与査読

抄録

Recently, research has considered the problem of steel columns and signposts corroding at the boundary with concrete in Japan. It is difficult to detect such corrosions visually. Furthermore, steel-concrete composite joints are usedin many bridges and buildings in Japan. In composite joints, the steel members are embeddedin concrete slabs or concrete footings and corroded. lt is therefore necessary to develop a non-destructive inspection method for identifying such damage. Few studies have shown how to locate corrosion on steel embeddedin concrete. In this study, specimens imitating standard steel columns and signposts were damaged so as to obtain basic data on non-destructive inspection of steel-concrete composite joints. In electric corrosiontests of1-shaped steel columns and pipes embeddedin concrete, we examined the relationship between corrosion ratio (amount of steel corrosion) and vibration characteristic (resonance frequency, damping coefficient and ultrasonic velocity). In the steel corrosion tests, the corrosion ratio was about 40%. Our results found that the velocity of supersonic waves traveling through footings containing composite joints decreased as the corrosion ratio increased. Resonance frequency of concrete footing also decreased, but only slightly.

本文言語英語
ホスト出版物のタイトルProceedings of the 10th fib International PhD Symposium in Civil Engineering
編集者Nicolas Rouleau, Josee Bastien, Mathieu Fiset, Mathieu Thomassin
出版社Universite Laval
ページ387-392
ページ数6
ISBN(電子版)9782980676215
出版ステータス出版済み - 2014
イベント10th International Federation for Structural Concrete (fib) International PhD Symposium in Civil Engineering 2014 - Quebec City, カナダ
継続期間: 2014 7月 212014 7月 23

出版物シリーズ

名前Proceedings of the 10th fib International PhD Symposium in Civil Engineering

会議

会議10th International Federation for Structural Concrete (fib) International PhD Symposium in Civil Engineering 2014
国/地域カナダ
CityQuebec City
Period14/7/2114/7/23

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