CHEMICALLY-BONDED POST-INSTALLED STEEL REBARS IN A FULL-SCALE SLAB-WALL CONNECTION SUBJECTED TO THE STANDARD FIRE (ISO 834-1) - Archive ouverte HAL Access content directly
Conference Papers Year : 2017

CHEMICALLY-BONDED POST-INSTALLED STEEL REBARS IN A FULL-SCALE SLAB-WALL CONNECTION SUBJECTED TO THE STANDARD FIRE (ISO 834-1)

Abstract

The improvement in mechanical and adhesion properties of polymer resins allowed to progressively substitute cast-in place rebars by chemically-bonded post-installed rebars in some applications, by providing equivalent or even higher mechanical properties at ambient temperature. However, the mechanical behavior of post-installed rebars is mainly governed by the mechanical behavior of polymer resins, which are highly sensitive to temperature, addressing the topic of fire safety. In 2015, the European Assessment Document 330087-00-06.01 has been issued to harmonize the evaluation method on fire performance of these polymeric adhesives. This evaluation document proposes a fire design method allowing to ensure a sufficient bond resistance for a given duration of fire exposure before collapse. This paper presents a full-scale fire test performed in the " Vuclain " modular gas furnace at CSTB Champs-sur-Marne (France), carried out on a 2.94 m x 2 m x 0.15 m cantilever concrete slab connected to a wall by chemically-bonded post-installed rebars and exposed to ISO fire 834-1 until failure. Experimental investigations showed that the design method presented in this paper is able to predict a time of slab collapse very close to that obtained by the fire test. The interpretation of the data collected during the fire test revealed the presence of thermal and physical phenomena responsible for the decay in the fire resistance of the post-installed rebars and therefore, responsible for the slab collapse under fire exposure.

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Structures
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Dates and versions

hal-01617391 , version 1 (16-10-2017)

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  • HAL Id : hal-01617391 , version 1

Cite

Mohamed Amine Lahouar, Nicolas Pinoteau, Jean-François Caron, Gilles Forêt, Thierry Guillet, et al.. CHEMICALLY-BONDED POST-INSTALLED STEEL REBARS IN A FULL-SCALE SLAB-WALL CONNECTION SUBJECTED TO THE STANDARD FIRE (ISO 834-1). ConSC 2017: 3rd International Symposium on Connections between Steel and Concrete , Sep 2017, Stuttgart, Germany. ⟨hal-01617391⟩
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