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1996 Fiscal Year Final Research Report Summary

Ultrasonic stress measurement and evaluation method of deterioration

Research Project

Project/Area Number 07555136
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section試験
Research Field 土木材料・力学一般
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KOBAYASHI Shoichi  Kyoto Univ., Global Environ.Eng., Prof., 工学研究科, 教授 (90025908)

Co-Investigator(Kenkyū-buntansha) NISHIMURA Naoshi  Kyoto Univ., Global Environ.Eng., Assoc.Prof., 工学研究科, 助教授 (90127118)
Project Period (FY) 1995 – 1996
KeywordsPrecise wave measurement / Laser velocimetry / sing-around unit / initial stress in a rock / axial force in a bolt / inverse flaw detection / 欠陥検出逆解析
Research Abstract

This project aims at fundamental research of 1) ultrasonic stress measurement and 2) evaluation method of deterioration. Main results obtained are as follows :
1) Precise measuring system of ultrasonic wave measuring system is developed by combining a high-power pulse generator and a laser velocimetry.
2) Digital data acquisition, computational and control system is developed by combining the laser velocimetry, digital oscilloscope, GPIB and LabVIEW in stalled in a PC.
3) Using above systems, precise wave measurements are carried out and data are supplied for the fur ther computation and control.
4) Ultrasonic measurement of initial stress in a rock is proposed by characterizing the hysteresis behavior of a rock specimen.
5) Axial stress measurement of a high-strength bolt is proposed.
6) Inverse flaw detection method using observed data combined with boundary element technique is proposed.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] S. Kobayashi: "Initial stress estimation in rock using ultrasonic" Rock Stress(Sugawara & Obara eds.)Balkema. 161-166 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小林 昭一: "超音波による地山初期応力推定" 第10回岩の力学国内シンポジウム講演論文集, ISRM. 677-682 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Yamaguchi, S. Kobayashi: "Axial Force Measurement of High Strength Bolts by using Ultrasonic Waves" Proc. of the 7^<th> KAIST-NTU-KU Tri-Lateral Seminar. 185-190 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Kobayashi, T.Yamaguchi et al.: "Initial stress estimation in a rock using ultrasonic" Rock Stress (Sugawara & Obara eds.) Balkema. 161-166 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Kobayashi, T.Yamaguchi et al.: "Initial stress measurement by ultrasonic waves" 10^<th> Symposium on Rock Mechanics, ISRM (in Japanese). 677-682 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Yamaguchi, S.Kobayashi et al.: "Axial force measurement of high strength bolts by using ultrasonic waves" Proc.7^<th> KAIST-NTU-KU Tri-lateral Seminar/Workshop on civil Engineering, Kyoto. 185-190 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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