Inference of bond slip in prestressed tendons in concrete bridge girders
Corresponding Author
Siu Chun M. Ho
Department of Mechanical Engineering, University of Houston, Houston, TX, USA
Correspondence to: S. C. M. Ho, Department of Mechanical Engineering, University of Houston, Houston, TX, USA.
E-mail: [email protected]
Search for more papers by this authorLiang Ren
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
Department of Mechanical Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorEmad Labib
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorAadit Kapadia
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorYi-Lung Mo
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorHongnan Li
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
Search for more papers by this authorGangbing Song
Department of Mechanical Engineering, University of Houston, Houston, TX, USA
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorCorresponding Author
Siu Chun M. Ho
Department of Mechanical Engineering, University of Houston, Houston, TX, USA
Correspondence to: S. C. M. Ho, Department of Mechanical Engineering, University of Houston, Houston, TX, USA.
E-mail: [email protected]
Search for more papers by this authorLiang Ren
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
Department of Mechanical Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorEmad Labib
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorAadit Kapadia
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorYi-Lung Mo
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorHongnan Li
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
Search for more papers by this authorGangbing Song
Department of Mechanical Engineering, University of Houston, Houston, TX, USA
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
Department of Civil and Environment Engineering, University of Houston, Houston, TX, USA
Search for more papers by this authorSummary
Prestressed concrete (PC) bridge girders have extra flexural strength due to embedded prestressing tendons. The level of strength depends on the integrity of the concrete-tendon bond in pretensioned PC structures, and this bond can be degraded in the presence of an adequately large mechanical force or over time because of accumulated damage. Bond degradation is characterized by the bond slip of the tendon from the host concrete, and in regards to PC structures, bond slip has only been measured from a global perspective. In this paper, a novel method was developed to measure for the first time the local strain of a prestressing tendon during bond slip. Fiber Bragg grating-based strain sensors were installed directly onto prestressing tendons within a PC girder to provide a local perspective of bond slip as the girder was loaded to failure. Measurement of the local strains in selected tendons, from the beginning of bond slip to the complete loss of the concrete-tendon bond, and the failure of the girder was enabled by the method. Copyright © 2014 John Wiley & Sons, Ltd.
References
- 1 CEB-FIP. State-of-the-art report on bond of reinforcement in concrete. State-of- Art Report Prepared by Task Group Bond Models (former CEB Task Group 2.5) FIB -Féd. Int. du Béton 2000; 1–97.
- 2 Li X. Finite element modeling of skewed reinforced concrete bridges and the bond-slip relationship between concrete and reinforcement Auburn University MS Thesis 2007.
- 3 Janney JR. Report of stress transfer length studies on 270 k prestressing strand. PCI Journal 1963; 8: 41–45.
- 4 Holmberg A, Lindgren S. Anchorage and prestress transmission. Document D1 Stockholm: National Swedish Institute for Building Research 1970.
- 5 Hanson NW, Kaar PH. Flexural bond tests of pretensioned prestressed beams. ACI Journal Proceedings 1959; 55: 783–802.
- 6 Hoyer E, Friedrich E. Contribution to the question of bond stress in reinforced concrete elements. Beton und Eisen 1939; 38: 107–110 (March 20).
- 7 Stocker MF, Sozen MA. Investigation of prestressed concrete for highway bridges, Part V: bond characteristics of prestressing strand Bulletin 503 Urbana: University of Illinois Engineering Experiment Station 1970.
- 8 Abrams DA. Tests of bond between concrete and steel Bulletin No. 711913
- 9 Watstein D. Distribution of bond stress in concrete in pull-out specimens. ACI Journal 1947; 44: 1041–1052.
- 10 Mains RM. Measurement of the distribution of tensile and bond stresses along reinforcing bars. ACI Journal 1951; 48: 225–252.
- 11 Kenel A, Nellen P, Frank A, Marti P. Reinforcing steel strains measured by Bragg grating sensors. Journal of Materials in Civil Engineering 2005; 4: 423–431.
- 12 Chung W, Kang D. Full-scale test of a concrete box girder using FBG sensing system. Engineering Structures 2008; 30: 643–652.
- 13 Zhou Z, He J, Yan K, Ou J. Large scale distribution monitoring of FRP-OF based on BOTDR technique for infrastructures sensor systems and networks: phenomena, technology, and applications for NDE and health monitoring, San Diego, California, Proc. SPIE 2007; 6530.
- 14 Zhou Z, He J, Huang Y, Ou J. Experimental Investigation of RC Beams USING BOTDA(R)-FRF-OF 19th International Conference on Optical Fibre Sensors, Proc. SPIE 2008; 7004.
- 15 Lan C, Zhou Z, Ou J. Full-scale prestress loss monitoring of damaged RC structures using distributed optical fiber sensing technology. Sensors 2012; 48: 5380–5394.
- 16
Lan C,
Zhou Z,
Ou J. Monitoring of structural prestress loss in RC beams by inner distributed Brillouin and fiber Bragg grating sensors on a single optical fiber. Structural Control and Health Monitoring 2013. doi:10.1002/stc.1563.
10.1002/stc.1563 Google Scholar
- 17 Benitez JM, Galvez JC. Bond modeling of prestressed concrete during the prestressing force release. Materials and Structures 2011; 44: 263–278.
- 18 Gustavson R. Experimental studies of the bond response of three-wire strands and some influencing parameters. Materials and Structures 2004; 37: 96–106.
- 19 den Ujil JA. Bond and splitting action of prestressed strand. In Bond in concrete from research to practice. Riga Technical University and CEB, Riga Latvia 1992; 2: 2-79–2-88.
- 20 Abrishami H, Mitchell D. Bond characteristics of pretensioned strand. ACI Materials Journal 1993; 90: 228–235.
- 21 Tassios T, Bonataki E. Experimental analysis of the bond behaviour of prestressed tendons. In bond in concrete from research to practice. Riga Technical University and CEB, Riga, Latvia 1992; 1: 2-29–2-37.
- 22 Yerlici VA, Özturan T. Factors affecting anchorage bond strength in high-performance concrete. ACI Structural Journal 2000; 97: 499–507.
- 23 Shahawy MA, Batchelor B. Shear behavior of full-scale prestressed concrete girders: comparison between AASTHO specifications and LRFD code. PCI Journal, Precast/Prestressed Concrete Institute 1996; 41(3): 48–62.
- 24 NCHRP 579. Application of LRFD Bridge Design Specifications to High-Strength Structural Concrete: Shear Provisions NCHRP Report 579, Transportation Research Board, sponsored by ASSHTO and FHWA 2007.
- 25 Moerman W, Waele WD, Coppens C, Taerwe L, Degrieck J, Baets R, Callens M. Monitoring of a prestressed concrete girder bridge with fiber optical Bragg grating. Sensors Strain 2001; 37: 151–153.
- 26 Lin YB, Chang KC, Chern JC, Wang LA. The health monitoring of a prestressed concrete beam by using fiber Bragg grating sensors. Smart Materials and Structures 2004; 13: 712–718.
- 27 Ren L, Chen J, Li HN, Song G, Ji X. Design and application of a fiber Bragg grating strain sensor with enhanced sensitivity in the small-scale dam model. Smart Materials and Structures 2009; 18: 035015.
- 28 Kashyap R, López-Higuera JM. 2002. Handbook of Optical Fibre Sensing Technology, JM López-Higuera (ed). Wiley: New York, 349.
- 29 AASHTO. 2010. AASHTO LRFD Bridge Design Specifications 4th Ed. American Association of State Highway and Transportation Officials (AASHTO) Washington D C.
