Evaluation of Prestress Force on Bonded Tendons Using Practical Formula

详细信息    查看全文

• 作者：B. H. Kim (1)
  
  1. Department of Civil Engineering ; Kyungnam University ; 11 Woeyeongbuk 16-gil ; Masanhappo ; Changwon ; Gyeongnam ; 631-701 ; Republic of Korea
  
• 关键词：Tension estimation ; Impact ; echo test ; Longitudinal vibration ; Prestressed concrete ; Tendon ; Nuclear containment
• 刊名：Experimental Mechanics
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：55
• 期：2
• 页码：439-447
• 全文大小：1,117 KB
• 参考文献：1. M. K. Tadros, N. A. Omaishi, S. J. Seguirant, J. G. Gallt, (2001) Prestress losses in Pretensioned high-strength concrete bridge girders, Transp Res Board, NCHRP Report No. 496
  2. A.T.Ciolko, H.Tabatabai (1999) Nondestructive methods for condition evaluation of prestressing steel strands in concrete bridges - final report, phase I: Technol Rev, NCHRP Web Document 23 (Project 10鈥?3)
  3. Hughes, DS, Kelly, JL (1953) Second-order elastic deformation of solids. Phys Rev 92: pp. 1145-1149 CrossRef
  4. Chen, HL, Wissawapaisal, K (2001) Measurement of tensile forces in a seven-wire prestressing strand using stress waves. J Eng Mech ASCE 127: pp. 599-606 CrossRef
  5. Chen, HL, Wissawapaisal, K (2002) Application of Wigner-Villw transform to evaluate tensile forces in seven-wire prestressing strands. J Eng Mech ASCE 128: pp. 1206-1214 CrossRef
  6. Washer, GA, Green, RE, Pond, (2002) Velocity constants for ultrasonic stress measurement in prestressing tendons. Res Nondestruct Eval 14: pp. 81-94 CrossRef
  7. Scalea, FL, Rizzo, P, Seible, F (2003) Stress measurement and defect detection in steel strands by guided stress waves. J Mater Civ Eng 15: pp. 219-227 CrossRef
  8. Rizzo, P (2006) Ultrasonic wave propagation in progressively loaded multi-wire strands. Exp Mech 46: pp. 297-306 CrossRef
  9. Chaki, S, Bourse, G (2009) Stress level measurement in prestressed steel strands using acoustoelastic effect. Exp Mech 49: pp. 673-681 CrossRef
  10. Kwun, H, Bartels, KA, Hanley, JJ (1998) Effects of tensile loading on the properties of elastic-wave propagation in a strand. J Acoust Soc Am 103: pp. 3370-3375 CrossRef
  11. Beard, MD, Lowe, MJS, Cawley, P (2003) Ultrasonic guided waves for inspection of grouted tendons and bolts. J Mater Civ Eng 15: pp. 212-218 CrossRef
  12. Kim, BH, Jang, JB, Lee, HP, Lee, DH (2010) Effect of prestress on longitudinal vibration of bonded tendons embedded in a nuclear containment. Nucl Eng Des 240: pp. 1281-1289 CrossRef
  13. Kim, BH, Jang, JB, Lee, HP, Lee, DH (2012) Evaluating longitudinal vibration characteristics of bonded strands embedded in prestressed concrete beams by a system identification approach. Compos Part B 43: pp. 1531-1537 CrossRef
  14. E. Buckingham (1914) On physically similar systems; illustration of the use of dimensional equations. Phys Rev;4
  15. Collins, MP, Mitchell, D (1991) Prestressed concrete structures. Prentice Hall, Inc, Englewood
  16. N. Stubbs (1985) A general theory of non-destructive damage detection in structures, in: H.H.H. Leipholz (Ed.), proceedings of the second international symposium on structural control, University of Waterloo, Ontario, Canada, Martinus Nijhoff Publishers, Dordrecht, Netherlands, 694鈥?13
  17. A. Wyche (1978) Wolsung-1 nuclear power plant desigh report: reactor building containment structure stress analysis report, CANATOM, Report No. DR-0059-21020-02
  
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Theoretical and Applied Mechanics
  Characterization and Evaluation Materials
  Structural Mechanics
  Engineering Fluid Dynamics
  Engineering Design
  
• 出版者：Springer Boston
• ISSN：1741-2765

文摘

This work introduces a non-destructive experimental technique to evaluate the existing prestress level on bonded tendons embedded in a post-tensioned concrete structure. By measuring the longitudinal stress wave velocity on the strands, the applied stress level can be evaluated using an experimental formula. The experimental relation between the applied stress levels and the stress wave velocity is derived from various impact-echo test results for a set of prestressed concrete beam specimens with different tensile stress levels. The experimental results reveal that the longitudinal stress wave velocity of the bonded strands increases nonlinearly as the applied tensile stress level increases. To investigate the field applicability and feasibility of the approach, longitudinal impact-echo tests are conducted for two prestressed bonded tendons embedded in a nuclear reactor containment building. This reveals that the proposed approach is feasible and applicable for the unique identification of the existing prestress levels on the individual strands embedded in a real post-tensioned concrete structure.