HORIZONTAL CRACK DETECTION IN RC SLABS BY ELECTROMAGNETIC PULSE METHOD FOCUSING ON ELASTIC WAVE PROPAGATION TIME
In this study, an evaluation method focusing on the propagation time of elastic waves was investigated for detecting horizontal cracks in RC slabs using the electromagnetic pulse method. Specifically, we set several elastic wave receiving points on the surface of RC slab and confirmed the difference...
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| Published in | Cement Science and Concrete Technology Vol. 78; no. 1; pp. 221 - 228 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English Japanese |
| Published |
Japan Cement Association
31.03.2025
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0916-3182 2187-3313 |
| DOI | 10.14250/cement.78.221 |
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| Abstract | In this study, an evaluation method focusing on the propagation time of elastic waves was investigated for detecting horizontal cracks in RC slabs using the electromagnetic pulse method. Specifically, we set several elastic wave receiving points on the surface of RC slab and confirmed the difference of elastic wave propagation time depending on the presence or absence of horizontal cracks by finite element analysis and specimen experiments when the reinforcing bars inside the slab were electromagnetically vibrated. As a result, it was shown that horizontal cracks, which are difficult to be detected by the conventional method based on the amplitude of vibration response, can be evaluated by focusing on the difference of elastic wave propagation time. |
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| AbstractList | In this study, an evaluation method focusing on the propagation time of elastic waves was investigated for detecting horizontal cracks in RC slabs using the electromagnetic pulse method. Specifically, we set several elastic wave receiving points on the surface of RC slab and confirmed the difference of elastic wave propagation time depending on the presence or absence of horizontal cracks by finite element analysis and specimen experiments when the reinforcing bars inside the slab were electromagnetically vibrated. As a result, it was shown that horizontal cracks, which are difficult to be detected by the conventional method based on the amplitude of vibration response, can be evaluated by focusing on the difference of elastic wave propagation time. |
| Author | TERASAWA, Koki KIHARA, Shoya FUKUDA, Taiki KAMADA, Toshiro |
| Author_xml | – sequence: 1 fullname: TERASAWA, Koki organization: OSAKA UNIVERSITY, Graduate School of Engneering, Division of Global Architecture（2-1, Yamadaoka, Suita-shi, Osaka 565-0871, Japan） – sequence: 1 fullname: KAMADA, Toshiro organization: OSAKA UNIVERSITY, Graduate School of Engneering, Division of Global Architecture（2-1, Yamadaoka, Suita-shi, Osaka 565-0871, Japan） – sequence: 1 fullname: KIHARA, Shoya organization: OSAKA UNIVERSITY, Graduate School of Engneering, Division of Global Architecture（2-1, Yamadaoka, Suita-shi, Osaka 565-0871, Japan） – sequence: 1 fullname: FUKUDA, Taiki organization: WEST NIPPON EXPRESSWAY COMPANY LIMITED, Bridge and Structural Engineering Division Technical Development and Environment Department Technical Development Bureau（1-6-20, Dojima, Kita-ku, Osaka-shi, Osaka 530-0003, Japan） |
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| References | 2) 松本直士ほか：電磁波レーダ法を用いたRC床版の定量的状態判別手法、構造工学論文集、Vol.66A、pp.791-799（2020） 3) 鈴木真ほか：電磁パルス法の適用による水平ひび割れを有するRC床版の振動挙動に関する基礎的研究、コンクリート工学年次論文集、Vol.42、No.1、pp.1654-1659（2020） 5) 大野健太郎ほか：AE波初動部の自動読み取りの開発によるSiGMA解析の改良、非破壊検査、第57巻11号、pp.531-536（2008） 1) 國松博一ほか：一般国道275号志寸川橋の床版陥没について─陥没の発生から復旧まで─、第56回（平成24年度）北海道開発技術研究発表会（2013） 4) 小間健右ほか：弾性波の入力・受信位置の違いが電磁パルス法を用いたRC床版の水平ひび割れ検出に与える影響、コンクリート構造物の補修、補強、アップグレードシンポジウム論文報告集、第23巻、pp.223-228（2023） 1 2 3 4 5 |
| References_xml | – reference: 1) 國松博一ほか：一般国道275号志寸川橋の床版陥没について─陥没の発生から復旧まで─、第56回（平成24年度）北海道開発技術研究発表会（2013） – reference: 3) 鈴木真ほか：電磁パルス法の適用による水平ひび割れを有するRC床版の振動挙動に関する基礎的研究、コンクリート工学年次論文集、Vol.42、No.1、pp.1654-1659（2020） – reference: 2) 松本直士ほか：電磁波レーダ法を用いたRC床版の定量的状態判別手法、構造工学論文集、Vol.66A、pp.791-799（2020） – reference: 5) 大野健太郎ほか：AE波初動部の自動読み取りの開発によるSiGMA解析の改良、非破壊検査、第57巻11号、pp.531-536（2008） – reference: 4) 小間健右ほか：弾性波の入力・受信位置の違いが電磁パルス法を用いたRC床版の水平ひび割れ検出に与える影響、コンクリート構造物の補修、補強、アップグレードシンポジウム論文報告集、第23巻、pp.223-228（2023） – ident: 2 – ident: 3 – ident: 5 – ident: 4 – ident: 1 |
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| SubjectTerms | Elastic Wave Propagation Time Electromagnetic Pulse Method Horizontal Crack Non-destructive Inspection RC Slabs |
| Title | HORIZONTAL CRACK DETECTION IN RC SLABS BY ELECTROMAGNETIC PULSE METHOD FOCUSING ON ELASTIC WAVE PROPAGATION TIME |
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