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Communication Dans Un Congrès Année : 2016

Experimental investigations on the influence of temperature on the behavior of steel reinforcement (strands and rebars)

Résumé

In the case of exceptional accidents, nuclear containment structures may be submitted to an internal temperature increase. This may have an influence on the prestressed concrete structures behavior regarding both its mechanical performance and its porosity. The presented study got interested on the impact that a temperature increase may have on the mechanical behavior of the steel reinforcement for both prestressing strands and rebars. In order to remain in realistic situations, it was chosen to study temperatures between 20°C and 140°C. In a first part, a bibliography review will be presented to assess the expected results of the led experimental investigations. Then, some investigations regarding steel rebars will be presented. Two kinds of tests have been carried out: some tensile tests to determine how their mechanical behavior was affected by the temperature, and some pull-out tests to get some insight of the evolution of the adherence within concrete. Finally, some investigations on steel strands will be described: some tensile tests at different temperatures, and some relaxation tests to check how the level of prestress loss may be affected by the temperature. This experimental study is part of a national French project (MACENA) aiming at assessing the impact of an accident on the behavior of nuclear containment structures. The gathered experimental data should be useful for the assessment of their damage.
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Dates et versions

hal-01488185 , version 1 (13-03-2017)

Identifiants

  • HAL Id : hal-01488185 , version 1

Citer

Wiem Toumi Ajimi, Sylvain Chataigner, Laurent Gaillet. Experimental investigations on the influence of temperature on the behavior of steel reinforcement (strands and rebars). CONSEC 2016, 8th International Conference on Concrete under Severe Conditions-Environment & Loading, Sep 2016, Lecco, Italy. 8p. ⟨hal-01488185⟩
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