Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Prediction of premature separation of bonded CFRP plates from strengthened steel beams using a fracture criterion

  • Lenwari, A. (Department of Civil Engineering, Chulalongkorn University) ;
  • Thepchatri, T. (Department of Civil Engineering, Chulalongkorn University) ;
  • Watanabe, E. (Department of Civil Engineering, Kyoto University)
  • Received : 2002.04.23
  • Accepted : 2002.09.05
  • Published : 2002.11.25
⟨ Previous Next ⟩

Abstract

This paper presents a method for predicting premature separation of carbon fiber reinforced plastic (CFRP) plates from strengthened steel beams. The fracture criterion based on material-induced singularity is formulated in terms of a singular intensity factor. Static test on double strap joints was selected to provide the critical stress intensity factor in the criterion because good degree of accuracy and consistency of experimental data can be expected compared with the unsymmetrically loaded single lap joints. The debond/separation loads of steel beams with different CFRP lengths were measured and compared with those predicted from the criterion. Good agreement between the test results and the prediction was found.

Keywords

References

  1. American Association of State Highway Bridges, AASHTO (1996), Standard Specifications for Highway Bridges, 16th edition.
  2. Bogy, D.B. (1971), "Two edge-bonded elastic wedges of different materials and wedge angles under surface tractions", Transactions ASME, J. Appl. Mech., 38, 377-386. https://doi.org/10.1115/1.3408786
  3. Groth, H.L. (1987), Analysis of Adhesive Joints, Report No. 87-17, Department of Aeronautical Structures and Materials, The Royal Institute of Technology, SWEDEN.
  4. Japanese Society of Steel Construction, JSSC (1995), Fatigue Design Recommendations for Steel Structures.
  5. Lenwari, A. and Thepchatri, T. (2001), "Prediction of failure load in steel beams bonded with CFRP plates due to fracture at plate ends using stress singularity parameter", Proceedings of the fourteenth KKNN symposium on Civil Engineering, Kyoto, Japan, 259-265.
  6. Sen, R., Liby, L., Spillett, K. and Mullins, G. (1995), "Strengthening steel composite bridge members using CFRP laminates", Non-metallic (FRP) Reinforcement for Concrete Structures, RILEM, 551-558.
  7. Steel Structures Painting Council (1991), Surface Preparation, Extracted from Vol. 2, Systems and Specification, 6th Edition, Pittsburgh, PA.

Cited by

  1. Flexural Response of Steel Beams Strengthened with Partial-Length CFRP Plates vol.9, pp.4, 2005, https://doi.org/10.1061/(ASCE)1090-0268(2005)9:4(296)
  2. Experimental and finite element analysis of a double strap joint between steel plates and normal modulus CFRP vol.75, pp.1-4, 2006, https://doi.org/10.1016/j.compstruct.2006.04.038
  3. On the elasto-plastic behavior of continuous steel beams reinforced by bonded CFRP lamina vol.49, 2013, https://doi.org/10.1016/j.engstruct.2012.12.018
  4. Prediction of debonding strength of tensile steel/CFRP joints using fracture mechanics and stress based criteria vol.76, pp.2, 2009, https://doi.org/10.1016/j.engfracmech.2008.10.005
  5. Response of statically determined steel beams reinforced by CFRP plates in the elastic–plastic regime vol.31, pp.4, 2009, https://doi.org/10.1016/j.engstruct.2008.12.005
  6. Failure Assessment of Steel/CFRP Double Strap Joints vol.7, pp.7, 2017, https://doi.org/10.3390/met7070255
  7. Fracture mechanics based assessment of manufacturing defects laying at the edge of CFRP-metal bondlines 2018, https://doi.org/10.1007/s11740-018-0796-1
  8. Elasto-plastic debonding strength of tensile steel/CFRP joints vol.85, 2012, https://doi.org/10.1016/j.engfracmech.2012.02.008
  9. Reinforcement delamination of metallic beams strengthened by FRP strips: Fracture mechanics based approach vol.73, pp.14, 2006, https://doi.org/10.1016/j.engfracmech.2006.03.011
  10. Strengthening of steel hollow pipe sections subjected to transverse loads using CFRP vol.60, pp.1, 2016, https://doi.org/10.12989/sem.2016.60.1.163
  11. Interaction of interface delamination and plasticity in tensile steel members reinforced by CFRP plates vol.146, pp.1-2, 2007, https://doi.org/10.1007/s10704-007-9144-8
  12. Debonding failure analysis of FRP-retrofitted concrete panel under blast loading vol.38, pp.4, 2002, https://doi.org/10.12989/sem.2011.38.4.479