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Probabilistic assessment of the effect of spalling on the displacement of concrete slabs exposed to fire

Ruben Van Coile (UGent), Robby Caspeele (UGent), Luc Taerwe (UGent) and Dirk Gouverneur (UGent)
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Abstract
During a fire, some types of concrete are known to be susceptible to a sudden detachment of the outer layer, known as explosive spalling, if a specific combination of influencing factors occurs. For a given reinforced concrete slab configuration, however, it is unclear which percentage of slabs can be expected to suffer from explosive spalling and whether possible spalling has a significant impact on the load bearing capacity and the deformations during fire. In this paper a methodology is developed in order to assess the probability of spalling and its effect on the deformations during fire exposure. A hydrothermal calculation method described in literature is combined with a full-probabilistic crosssectional calculation tool which allows to calculate the evolution of the mid-span vertical deflection during fire. The results indicate that for the investigated slab configuration the probability of occurrence of spalling is rather small (2.7%). However, when spalling occurs it has a significant impact on the deformations during fire, possibly even resulting in a premature collapse of the slab.
Keywords
numerical methods, reinforced concrete, spalling, probabilistic analysis, fire

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Chicago
Van Coile, Ruben, Robby Caspeele, Luc Taerwe, and Dirk Gouverneur. 2013. “Probabilistic Assessment of the Effect of Spalling on the Displacement of Concrete Slabs Exposed to Fire.” In Proceedings of the 2013 Fib Symposium : Engineering a Concrete Future : Technology, Modeling and Construction, ed. Avraham N Dancygier, 561–564. Tel-Aviv, Israel: Israeli Association of Construction & Infrastructure Engineers (IACIE) ; Israel Institute of Technology. Faculty of Civil and Environmental Engineering. Technion.
APA
Van Coile, R., Caspeele, R., Taerwe, L., & Gouverneur, D. (2013). Probabilistic assessment of the effect of spalling on the displacement of concrete slabs exposed to fire. In A. N. Dancygier (Ed.), Proceedings of the 2013 fib symposium : engineering a concrete future : technology, modeling and construction (pp. 561–564). Presented at the 2013 fib Symposium: Engineering a concrete future : technology, modeling and construction, Tel-Aviv, Israel: Israeli Association of Construction & Infrastructure Engineers (IACIE) ; Israel Institute of Technology. Faculty of Civil and Environmental Engineering. Technion.
Vancouver
1.
Van Coile R, Caspeele R, Taerwe L, Gouverneur D. Probabilistic assessment of the effect of spalling on the displacement of concrete slabs exposed to fire. In: Dancygier AN, editor. Proceedings of the 2013 fib symposium : engineering a concrete future : technology, modeling and construction. Tel-Aviv, Israel: Israeli Association of Construction & Infrastructure Engineers (IACIE) ; Israel Institute of Technology. Faculty of Civil and Environmental Engineering. Technion; 2013. p. 561–4.
MLA
Van Coile, Ruben, Robby Caspeele, Luc Taerwe, et al. “Probabilistic Assessment of the Effect of Spalling on the Displacement of Concrete Slabs Exposed to Fire.” Proceedings of the 2013 Fib Symposium : Engineering a Concrete Future : Technology, Modeling and Construction. Ed. Avraham N Dancygier. Tel-Aviv, Israel: Israeli Association of Construction & Infrastructure Engineers (IACIE) ; Israel Institute of Technology. Faculty of Civil and Environmental Engineering. Technion, 2013. 561–564. Print.
@inproceedings{3238679,
  abstract     = {During a fire, some types of concrete are known to be susceptible to a sudden detachment of the outer layer, known as explosive spalling, if a specific combination of influencing factors occurs. For a given reinforced concrete slab configuration, however, it is unclear which percentage of slabs can be expected to suffer from explosive spalling and whether possible spalling has a significant impact on the load bearing capacity and the deformations during fire. In this paper a methodology is developed in order to assess the probability of spalling and its effect on the deformations during fire exposure. A hydrothermal calculation method described in literature is combined with a full-probabilistic crosssectional calculation tool which allows to calculate the evolution of the mid-span vertical deflection during fire. The results indicate that for the investigated slab configuration the probability of occurrence of spalling is rather small (2.7\%). However, when spalling occurs it has a significant impact on the deformations during fire, possibly even resulting in a premature collapse of the slab.},
  author       = {Van Coile, Ruben and Caspeele, Robby and Taerwe, Luc and Gouverneur, Dirk},
  booktitle    = {Proceedings of the 2013 fib symposium : engineering a concrete future : technology, modeling and construction},
  editor       = {Dancygier, Avraham N},
  isbn         = {9789659203901},
  keyword      = {numerical methods,reinforced concrete,spalling,probabilistic analysis,fire},
  language     = {eng},
  location     = {Tel-Aviv, Israel},
  pages        = {561--564},
  publisher    = {Israeli Association of Construction \& Infrastructure Engineers (IACIE) ; Israel Institute of Technology. Faculty of Civil and Environmental Engineering. Technion},
  title        = {Probabilistic assessment of the effect of spalling on the displacement of concrete slabs exposed to fire},
  year         = {2013},
}