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Modelling of local bond stress-slip behaviour in self-compacting concrete

Pieter Desnerck (UGent) , Geert De Schutter (UGent) and Luc Taerwe (UGent)
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Abstract
Concrete-to-steel bond is crucial in the force transfer between the two materials. Due to the importance of understanding the bond mechanism for designing structures this phenomenon has widely been studied for conventional vibrated concrete (CVC). For self-compacting concrete (SCC) however less test results are available and the standards for CVC are applied to self-compacting concrete. An experimental program, based on RILEM RC6 part 1, has been set up. The tests indicated that the maximum and characteristic bond strength of self-compacting concrete are slightly higher than for conventional vibrated concrete when small bar diameters are studied. For larger bar diameters the difference becomes smaller. The slip corresponding with the maximum bond strength increases for increasing bar diameters. Comparison of the test data with the bond model of the CEB-FIB Model Code 1990 indicated that the bond clauses underestimated the bond strength for SCC as well as for CVC. The influence of the bar diameter on the slip corresponding with the maximum bond stress is not implemented in the Model Code 1990 clauses. Therefore an adjustment of the bond model should be made.
Keywords
codes, self-compacting concrete, bond stress, slip relation, Bond, reinforcement

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Chicago
Desnerck, Pieter, Geert De Schutter, and Luc Taerwe. 2010. “Modelling of Local Bond Stress-slip Behaviour in Self-compacting Concrete.” In Codes in Structural Engineering, ed. Manfred A Hirt, Jure Radic, and Ana Mandic, 2:967–974. Ghent, Belgium: Ghent University, Department of Structural engineering.
APA
Desnerck, P., De Schutter, G., & Taerwe, L. (2010). Modelling of local bond stress-slip behaviour in self-compacting concrete. In M. A. Hirt, J. Radic, & A. Mandic (Eds.), Codes in structural engineering (Vol. 2, pp. 967–974). Presented at the Joint IABSE-FIB Conference : Codes in Structural Engineering : Development and Needs for International Practice (IABSE - 2010), Ghent, Belgium: Ghent University, Department of Structural engineering.
Vancouver
1.
Desnerck P, De Schutter G, Taerwe L. Modelling of local bond stress-slip behaviour in self-compacting concrete. In: Hirt MA, Radic J, Mandic A, editors. Codes in structural engineering. Ghent, Belgium: Ghent University, Department of Structural engineering; 2010. p. 967–74.
MLA
Desnerck, Pieter, Geert De Schutter, and Luc Taerwe. “Modelling of Local Bond Stress-slip Behaviour in Self-compacting Concrete.” Codes in Structural Engineering. Ed. Manfred A Hirt, Jure Radic, & Ana Mandic. Vol. 2. Ghent, Belgium: Ghent University, Department of Structural engineering, 2010. 967–974. Print.
@inproceedings{1617304,
  abstract     = {Concrete-to-steel bond is crucial in the force transfer between the two materials. Due to the importance of understanding the bond mechanism for designing structures this phenomenon has widely been studied for conventional vibrated concrete (CVC). For self-compacting concrete (SCC) however less test results are available and the standards for CVC are applied to self-compacting concrete. An experimental program, based on RILEM RC6 part 1, has been set up. The tests indicated that the maximum and characteristic bond strength of self-compacting concrete are slightly higher than for conventional vibrated concrete when small bar diameters are studied. For larger bar diameters the difference becomes smaller. The slip corresponding with the maximum bond strength increases for increasing bar diameters. Comparison of the test data with the bond model of the CEB-FIB Model Code 1990 indicated that the bond clauses underestimated the bond strength for SCC as well as for CVC. The influence of the bar diameter on the slip corresponding with the maximum bond stress is not implemented in the Model Code 1990 clauses. Therefore an adjustment of the bond model should be made.},
  author       = {Desnerck, Pieter and De Schutter, Geert and Taerwe, Luc},
  booktitle    = {Codes in structural engineering},
  editor       = {Hirt, Manfred A and Radic, Jure and Mandic, Ana},
  isbn         = {9789537621070},
  keyword      = {codes,self-compacting concrete,bond stress,slip relation,Bond,reinforcement},
  language     = {eng},
  location     = {Dubrovnik, Croatia},
  pages        = {967--974},
  publisher    = {Ghent University, Department of Structural engineering},
  title        = {Modelling of local bond stress-slip behaviour in self-compacting concrete},
  volume       = {2},
  year         = {2010},
}