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Verification of the bursting and spalling formulas in the FIB model code by finite element analyses of anchorage zones of pretensioned girders

Kizzy Van Meirvenne (UGent) , Luc Taerwe (UGent) , Veerle Boel (UGent) and Wouter De Corte (UGent)
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Abstract
In order to predict the stress and possible crack distribution in the anchorage zones of pretensioned girders several models have been developed as can be found in the fib Model Code, the ASHTOO code or Eurocode 2. In this paper, the bursting and spalling formulas from the fib Model Code are evaluated by finite element calculations since some issues could be raised when applying the proposed formulas for industrial applications, especially for beams of limited dimensions. The effect of the upper strands, the assumed stress distribution at the opposite side of the equivalent symmetric prism, the stress transfer diagram along the strands and the effects of the strand position relative to the simplified resultant forces remain unclear. Accordingly two-dimensional finite element models were developed to gain insight into the bursting and spalling formulations from the fib Model Code. The numerical models render stresses and the stress flow results, which allow a more clear coupling to well-known strut-and-tie models. The results indicate that for various strand configurations, especially for small beams, the fib formulations may be too conservative.

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MLA
Van Meirvenne, Kizzy, Luc Taerwe, Veerle Boel, et al. “Verification of the Bursting and Spalling Formulas in the FIB Model Code by Finite Element Analyses of Anchorage Zones of Pretensioned Girders.” Fib Symposium 2016. 2016. Print.
APA
Van Meirvenne, K., Taerwe, L., Boel, V., & De Corte, W. (2016). Verification of the bursting and spalling formulas in the FIB model code by finite element analyses of anchorage zones of pretensioned girders. Fib Symposium 2016. Presented at the fib Symposium 2016.
Chicago author-date
Van Meirvenne, Kizzy, Luc Taerwe, Veerle Boel, and Wouter De Corte. 2016. “Verification of the Bursting and Spalling Formulas in the FIB Model Code by Finite Element Analyses of Anchorage Zones of Pretensioned Girders.” In Fib Symposium 2016.
Chicago author-date (all authors)
Van Meirvenne, Kizzy, Luc Taerwe, Veerle Boel, and Wouter De Corte. 2016. “Verification of the Bursting and Spalling Formulas in the FIB Model Code by Finite Element Analyses of Anchorage Zones of Pretensioned Girders.” In Fib Symposium 2016.
Vancouver
1.
Van Meirvenne K, Taerwe L, Boel V, De Corte W. Verification of the bursting and spalling formulas in the FIB model code by finite element analyses of anchorage zones of pretensioned girders. Fib Symposium 2016. 2016.
IEEE
[1]
K. Van Meirvenne, L. Taerwe, V. Boel, and W. De Corte, “Verification of the bursting and spalling formulas in the FIB model code by finite element analyses of anchorage zones of pretensioned girders,” in Fib Symposium 2016, Cape Town, 2016.
@inproceedings{8501463,
  abstract     = {In order to predict the stress and possible crack distribution in the anchorage zones of pretensioned girders several models have been developed as can be found in the fib Model Code, the ASHTOO code or  Eurocode 2. In this paper, the bursting and spalling formulas from the fib Model Code are evaluated by finite element calculations since some issues could be raised when applying the proposed formulas for industrial applications, especially for beams of limited dimensions. The effect of the upper strands, the assumed stress distribution at the opposite side of the equivalent symmetric prism, the stress transfer diagram along the strands and the effects of the strand position relative to the simplified resultant forces remain unclear. Accordingly two-dimensional finite element models were developed to gain insight into the bursting and spalling formulations from the fib Model Code. The numerical models render stresses and the stress flow results, which allow a more clear coupling to well-known strut-and-tie models. The results indicate that for various strand configurations, especially for small beams, the fib formulations may be too conservative. },
  author       = {Van Meirvenne, Kizzy and Taerwe, Luc and Boel, Veerle and De Corte, Wouter},
  booktitle    = {Fib Symposium 2016},
  language     = {eng},
  location     = {Cape Town},
  title        = {Verification of the bursting and spalling formulas in the FIB model code by finite element analyses of anchorage zones of pretensioned girders},
  year         = {2016},
}