WO2001079831A3 - Nondestructive detection of reinforcing member degradation - Google Patents

Nondestructive detection of reinforcing member degradation Download PDF

Info

Publication number
WO2001079831A3
WO2001079831A3 PCT/US2001/011637 US0111637W WO0179831A3 WO 2001079831 A3 WO2001079831 A3 WO 2001079831A3 US 0111637 W US0111637 W US 0111637W WO 0179831 A3 WO0179831 A3 WO 0179831A3
Authority
WO
WIPO (PCT)
Prior art keywords
degradation
reinforcing member
reinforcing members
vibration
detect
Prior art date
Application number
PCT/US2001/011637
Other languages
French (fr)
Other versions
WO2001079831A2 (en
Inventor
David W Blodgett
George L Vojtech
Original Assignee
Univ Johns Hopkins
David W Blodgett
George L Vojtech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Johns Hopkins, David W Blodgett, George L Vojtech filed Critical Univ Johns Hopkins
Priority to CA002404102A priority Critical patent/CA2404102A1/en
Priority to EP01924896A priority patent/EP1272837A2/en
Priority to AU2001251505A priority patent/AU2001251505A1/en
Priority to US10/257,712 priority patent/US20040123665A1/en
Publication of WO2001079831A2 publication Critical patent/WO2001079831A2/en
Publication of WO2001079831A3 publication Critical patent/WO2001079831A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/11—Analysing solids by measuring attenuation of acoustic 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
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02458—Solids in solids, e.g. granules
    • 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
    • G01N2291/0427—Flexural waves, plate waves, e.g. Lamb waves, tuning fork, cantilever

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (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 Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

A nondestructive method of and apparatus for detecting degradation of reinforcing members embedded within a structure is disclosed. Degradation can arise from many sources, such as corrosion, fracture, cracking, fatigue, chemical reaction, etc. The device includes an inducing instrument(210) to induce a vibration of the reinforcing members (110)and a measuring device (220) to detect the vibration of the reinforcing members. The measurement is analyzed to detect the presence of reinforcing member degradation or reinforcing member-to-concrete bonding. The device may include a controller (230) to enhance the detection. The device may also include an amplifier (240) to further increase the energy in the waves imparted to the structure and the acoustic waves detected by the measuring instrument.(220)
PCT/US2001/011637 2000-04-13 2001-04-11 Nondestructive detection of reinforcing member degradation WO2001079831A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002404102A CA2404102A1 (en) 2000-04-13 2001-04-11 Nondestructive detection of reinforcing member degradation
EP01924896A EP1272837A2 (en) 2000-04-13 2001-04-11 Nondestructive detection of reinforcing member degradation
AU2001251505A AU2001251505A1 (en) 2000-04-13 2001-04-11 Nondestructive detection of reinforcing member degradation
US10/257,712 US20040123665A1 (en) 2001-04-11 2001-04-11 Nondestructive detection of reinforcing member degradation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US19707900P 2000-04-13 2000-04-13
US60/197,079 2000-04-13

Publications (2)

Publication Number Publication Date
WO2001079831A2 WO2001079831A2 (en) 2001-10-25
WO2001079831A3 true WO2001079831A3 (en) 2002-08-15

Family

ID=22727955

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/011637 WO2001079831A2 (en) 2000-04-13 2001-04-11 Nondestructive detection of reinforcing member degradation

Country Status (4)

Country Link
EP (1) EP1272837A2 (en)
AU (1) AU2001251505A1 (en)
CA (1) CA2404102A1 (en)
WO (1) WO2001079831A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9488620B2 (en) 2011-03-15 2016-11-08 Purdue Research Foundation Weak bond detection
CN108844856B (en) * 2018-07-04 2023-08-15 四川升拓检测技术股份有限公司 Sleeve grouting defect nondestructive testing method based on impact elastic wave and machine learning

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666656A1 (en) * 1990-09-11 1992-03-13 Thomson Csf Method and device for inspecting a structure by modal analysis
US5144838A (en) * 1989-10-04 1992-09-08 Iwatsu Electric Co., Ltd. Defect detecting method and apparatus
DE4239221A1 (en) * 1992-11-21 1994-05-26 Otto Dr Rer Nat Kroggel Ultrasonic reflectometry for flaw detection in reinforced concrete - compares backscatter measurements over constant distance along and across line of crack during successive phases of test
US5520052A (en) * 1994-02-10 1996-05-28 The United States Of America As Represented By The United States Department Of Energy Method and apparatus for determining material structural integrity
US5540096A (en) * 1994-06-07 1996-07-30 Washington Suburban Sanitary Commission Method for the non-destructive evaluation of prestressed concrete structures
WO1996041158A1 (en) * 1995-06-07 1996-12-19 Washington University Method and apparatus for predicting structural integrity by estimating modal damping factor
US5616865A (en) * 1993-11-24 1997-04-01 Holographics Inc. Acoustic wave generating apparatus
US5824908A (en) * 1994-12-12 1998-10-20 Queen's University At Kingston Non-contact characterization and inspection of materials using wideband air coupled ultrasound

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5144838A (en) * 1989-10-04 1992-09-08 Iwatsu Electric Co., Ltd. Defect detecting method and apparatus
FR2666656A1 (en) * 1990-09-11 1992-03-13 Thomson Csf Method and device for inspecting a structure by modal analysis
DE4239221A1 (en) * 1992-11-21 1994-05-26 Otto Dr Rer Nat Kroggel Ultrasonic reflectometry for flaw detection in reinforced concrete - compares backscatter measurements over constant distance along and across line of crack during successive phases of test
US5616865A (en) * 1993-11-24 1997-04-01 Holographics Inc. Acoustic wave generating apparatus
US5520052A (en) * 1994-02-10 1996-05-28 The United States Of America As Represented By The United States Department Of Energy Method and apparatus for determining material structural integrity
US5540096A (en) * 1994-06-07 1996-07-30 Washington Suburban Sanitary Commission Method for the non-destructive evaluation of prestressed concrete structures
US5824908A (en) * 1994-12-12 1998-10-20 Queen's University At Kingston Non-contact characterization and inspection of materials using wideband air coupled ultrasound
WO1996041158A1 (en) * 1995-06-07 1996-12-19 Washington University Method and apparatus for predicting structural integrity by estimating modal damping factor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LIMAYE H S: "NONDESTRUCTIVE TESTING OF CONCRETE AND MASONRY STRUCTURES USING AN FFT ANALYZER", ADVANCES IN INSTRUMENTATION AND CONTROL, INSTRUMENT SOCIETY OF AMERICA, RESEARCH TRIANGLE PARK, US, vol. 45, no. PART 1, 1990, pages 485 - 497, XP000172013, ISSN: 1054-0032 *
STEBER G R ET AL: "Detection and processing of impact echoes in concrete", SIGNAL PROCESSING AND SYSTEM CONTROL, FACTORY AUTOMATION. PACIFIC GROVE, NOV. 27 - 30, 1990, PROCEEDINGS OF THE ANNUAL CONFERENCE OF THE INDUSTRIAL ELECTRONICS SOCIETY. (IECON), NEW YORK, IEEE, US, vol. 1 CONF. 16, 27 November 1990 (1990-11-27), pages 340 - 345, XP010038158, ISBN: 0-87942-600-4 *

Also Published As

Publication number Publication date
EP1272837A2 (en) 2003-01-08
CA2404102A1 (en) 2001-10-25
AU2001251505A1 (en) 2001-10-30
WO2001079831A2 (en) 2001-10-25

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