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Evolution of the strains of traditional and self-compacting concrete during and after fire

Emmanuel Annerel (UGent) and Luc Taerwe (UGent)
(2011) MATERIALS AND STRUCTURES. 44(8). p.1369-1380
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Abstract
This paper deals with the strains developed in a traditional vibrated and a self-compacting concrete during heating, as well as the stress-strain relationship after the heating cycle. Information about the strains occurring during fire is necessary to calculate the structural response, whereas the mechanical properties after fire are needed to assess the remaining load bearing capacity. Since most concrete structures behave very well after a fire, such an assessment could be of economic interest. Firstly, in this paper, concrete cylinders are heated under different loading conditions during which the occurring strains are measured. Secondly, the same specimens are tested for Young's modulus after a post-cooling storage period of several weeks. It is observed that during heating under compressive stress, the free thermal expansion is partly compensated, resulting in smaller expansions and a relaxation of the thermal stresses. Besides these load related phenomena, also the cooling method and the post-cooling storage have an influence on the mechanical properties of the concrete after fire. From the experiments, several stress-strain models are derived, taking into account the temperature, the load level and a post-cooling storage in moist air during several weeks. The formulation of these models is based on the Sargin model which is also mentioned in EN 1992-1-2.
Keywords
Sargin, Stress-strain model, Post-cooling storage, Load ratio, Concrete, Fire, STRENGTH, TEMPERATURES, CEMENT PASTE

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Chicago
Annerel, Emmanuel, and Luc Taerwe. 2011. “Evolution of the Strains of Traditional and Self-compacting Concrete During and After Fire.” Materials and Structures 44 (8): 1369–1380.
APA
Annerel, E., & Taerwe, L. (2011). Evolution of the strains of traditional and self-compacting concrete during and after fire. MATERIALS AND STRUCTURES, 44(8), 1369–1380.
Vancouver
1.
Annerel E, Taerwe L. Evolution of the strains of traditional and self-compacting concrete during and after fire. MATERIALS AND STRUCTURES. 2011;44(8):1369–80.
MLA
Annerel, Emmanuel, and Luc Taerwe. “Evolution of the Strains of Traditional and Self-compacting Concrete During and After Fire.” MATERIALS AND STRUCTURES 44.8 (2011): 1369–1380. Print.
@article{2918092,
  abstract     = {This paper deals with the strains developed in a traditional vibrated and a self-compacting concrete during heating, as well as the stress-strain relationship after the heating cycle. Information about the strains occurring during fire is necessary to calculate the structural response, whereas the mechanical properties after fire are needed to assess the remaining load bearing capacity. Since most concrete structures behave very well after a fire, such an assessment could be of economic interest. Firstly, in this paper, concrete cylinders are heated under different loading conditions during which the occurring strains are measured. Secondly, the same specimens are tested for Young's modulus after a post-cooling storage period of several weeks. It is observed that during heating under compressive stress, the free thermal expansion is partly compensated, resulting in smaller expansions and a relaxation of the thermal stresses. Besides these load related phenomena, also the cooling method and the post-cooling storage have an influence on the mechanical properties of the concrete after fire. From the experiments, several stress-strain models are derived, taking into account the temperature, the load level and a post-cooling storage in moist air during several weeks. The formulation of these models is based on the Sargin model which is also mentioned in EN 1992-1-2.},
  author       = {Annerel, Emmanuel and Taerwe, Luc},
  issn         = {1359-5997},
  journal      = {MATERIALS AND STRUCTURES},
  keyword      = {Sargin,Stress-strain model,Post-cooling storage,Load ratio,Concrete,Fire,STRENGTH,TEMPERATURES,CEMENT PASTE},
  language     = {eng},
  number       = {8},
  pages        = {1369--1380},
  title        = {Evolution of the strains of traditional and self-compacting concrete during and after fire},
  url          = {http://dx.doi.org/10.1617/s11527-010-9703-8},
  volume       = {44},
  year         = {2011},
}

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