JP4496885B2 - コンクリート柱の緊張鋼線の断線を検出する方法 - Google Patents
コンクリート柱の緊張鋼線の断線を検出する方法 Download PDFInfo
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- JP4496885B2 JP4496885B2 JP2004242807A JP2004242807A JP4496885B2 JP 4496885 B2 JP4496885 B2 JP 4496885B2 JP 2004242807 A JP2004242807 A JP 2004242807A JP 2004242807 A JP2004242807 A JP 2004242807A JP 4496885 B2 JP4496885 B2 JP 4496885B2
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- steel wire
- tension steel
- concrete column
- magnetic field
- tension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/025—Change of phase or condition
- G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0421—Longitudinal waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
複数の緊張鋼線がコンクリート柱の長手方向の同じ位置で切断された場合、断線した緊張鋼線の断面から反射する信号の振幅が増大すること、および(3)切断された緊張鋼線の数が増えるにつれて、コンクリート柱の端部から反射した信号の振幅が減少すること、も示している。
Claims (6)
- コンクリート柱に配筋された緊張鋼線の非破壊評価の方法であって、
前記コンクリート柱において、MsS操作に必要なDC磁場を生じさせるステップと、
磁歪効果に基づいて、前記緊張鋼線にガイド波を発生するAC磁場のパルスを印加するステップと、
逆磁歪効果に基づいて、前記緊張鋼線の端部および前記コンクリート柱の端部から反射したガイド波信号を検出するステップと、
前記検出された信号を解析し、前記緊張鋼線における1つまたは複数の断線を示すことが知られている変化パターンと相関させるステップと、を含み、
前記ステップの全ては前記緊張鋼線と物理的に接触せずに行われ、前記DC磁場を生じさせるステップと、前記AC磁場のパルスを印加するステップと、前記ガイド波信号を検出するステップとはそれぞれ、前記柱の1つの場所から行われる緊張鋼線の非破壊評価の方法。 - 前記DC磁場を生じさせるステップは、前記コンクリート柱の長手方向に垂直なコンクリートの断面の鉄筋がない場所に、永久または電磁バイアス磁石を位置付けることを含む、請求項1に記載の緊張鋼線の非破壊評価の方法。
- 前記AC磁場のパルスを印加するステップは、前記コンクリート柱のDC磁場が生じている場所をMsSコイルで囲み、次いで適切な周波数の電流のパルスを前記コイルに印加するステップであって、それにより、磁歪効果に基づいて前記緊張鋼線に前記ガイド波が発生するステップを含む、請求項1に記載の緊張鋼線の非破壊評価の方法。
- 前記緊張鋼線および前記コンクリート柱の端部から反射した前記ガイド波信号を検出するステップは、前記MsSコイルを用いて、前記検出された信号を断線した鋼線について解析することにより行われる、請求項3に記載の緊張鋼線の非破壊評価の方法。
- 前記ガイド波信号を検出するステップは、前記緊張鋼線に近接して電磁ピックアップコイルを配置し、前記緊張鋼線内の逆磁歪効果により生じる、前記電磁ピックアップコイルに誘導される電圧の変化を検出するステップを含む、請求項1に記載の緊張鋼線の非破壊評価の方法。
- 前記電磁ピックアップコイルはU字形MsSプローブである、請求項5に記載の緊張鋼線の非破壊評価の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/673,649 US6815948B1 (en) | 2003-09-30 | 2003-09-30 | Method of detecting tension wire break in concrete pole |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005106812A JP2005106812A (ja) | 2005-04-21 |
JP4496885B2 true JP4496885B2 (ja) | 2010-07-07 |
Family
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JP2004242807A Expired - Fee Related JP4496885B2 (ja) | 2003-09-30 | 2004-08-23 | コンクリート柱の緊張鋼線の断線を検出する方法 |
Country Status (2)
Country | Link |
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US (1) | US6815948B1 (ja) |
JP (1) | JP4496885B2 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2883376B1 (fr) * | 2005-03-17 | 2007-06-15 | Fressinet Internat Stup | Procede de detection de rupture au sein d'une structure et systeme pour la mise en oeuvre du procede |
JP4295774B2 (ja) * | 2006-07-20 | 2009-07-15 | 株式会社日立ビルシステム | ワイヤーロープの探傷装置 |
CN101126742B (zh) * | 2007-09-13 | 2010-05-19 | 华中科技大学 | 一种测定磁致伸缩导波传播距离的方法 |
US7821258B2 (en) * | 2008-01-07 | 2010-10-26 | Ihi Southwest Technologies, Inc. | Method and system for generating and receiving torsional guided waves in a structure |
US7573261B1 (en) | 2008-06-20 | 2009-08-11 | Ihi Southwest Technologies, Inc. | Method and system for the generation of torsional guided waves using a ferromagnetic strip sensor |
CN101551254B (zh) * | 2009-05-08 | 2010-08-18 | 北京工业大学 | 一种采用多层绕线线圈的高性能磁致伸缩传感器 |
US20110018524A1 (en) * | 2009-07-24 | 2011-01-27 | Fitzsimmons Gary F | System and Method for Nondestructive Detection of Electrical Sensors and Cables |
US8653810B2 (en) | 2011-09-19 | 2014-02-18 | Southwest Research Institute | Flexible magnetostrictive sensor |
JP2015102405A (ja) * | 2013-11-25 | 2015-06-04 | 日本電信電話株式会社 | 検査方法および検査装置 |
KR102302566B1 (ko) * | 2014-09-29 | 2021-09-16 | 한국전력공사 | 철근파단 진단방법 및 장치 |
JP6338282B2 (ja) * | 2014-11-25 | 2018-06-06 | 中日本高速道路株式会社 | Pc構造物の診断方法 |
KR101643732B1 (ko) * | 2015-07-29 | 2016-07-28 | 서울대학교산학협력단 | 포스트텐션 긴장력 컨트롤 시스템 |
WO2019074174A1 (en) * | 2017-10-13 | 2019-04-18 | Korea Research Institute Of Standards And Science | STRAND TRACTION FORCE MEASURING SYSTEM USING GUIDED WAVE AND TRACTION FORCE MONITORING METHOD USING THE SAME |
JP6321878B1 (ja) * | 2017-11-24 | 2018-05-09 | 中日本高速技術マーケティング株式会社 | Pc鋼材劣化状況判別システム及びプログラム |
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2003
- 2003-09-30 US US10/673,649 patent/US6815948B1/en not_active Expired - Fee Related
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- 2004-08-23 JP JP2004242807A patent/JP4496885B2/ja not_active Expired - Fee Related
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US5456113A (en) * | 1992-11-06 | 1995-10-10 | Southwest Research Institute | Nondestructive evaluation of ferromagnetic cables and ropes using magnetostrictively induced acoustic/ultrasonic waves and magnetostrictively detected acoustic emissions |
US5457994A (en) * | 1992-11-06 | 1995-10-17 | Southwest Research Institute | Nondestructive evaluation of non-ferromagnetic materials using magnetostrictively induced acoustic/ultrasonic waves and magnetostrictively detected acoustic emissions |
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JP2001343368A (ja) * | 2000-06-02 | 2001-12-14 | Mitsubishi Heavy Ind Ltd | クリープ寿命の評価方法及び硬さの測定方法 |
JP2002090350A (ja) * | 2000-09-12 | 2002-03-27 | Masahiro Nishikawa | 磁歪体含有構造物の非破壊検査方法 |
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JP2003315317A (ja) * | 2002-04-18 | 2003-11-06 | Taiheiyo Cement Corp | コンクリート構造物の監視システム |
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US6815948B1 (en) | 2004-11-09 |
JP2005106812A (ja) | 2005-04-21 |
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