Experimental and numerical investigation of factors influencing thermal distribution and load-bearing capacity of bonded anchors under fire

Omar Al-Mansouri (1, 2) , Romain Mege (1) , Nicolas Pinoteau (1) , Sébastien Rémond (2) , Mohamed Amine Lahouar (1) , Thierry Guillet (1)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 LGCgE - Laboratoire de Génie civil et Géo-environnement

Due to the absence of guidelines for evaluating bonded anchors exposed to fire, only the existing method for mechanical anchors (without resin) is applicable. This method only covers steel failure mode for bonded anchors. Pull-out failure mode occurs more often than other failure modes for bonded anchors at high temperatures. This paper presents a numerical study of different parameters linked to the existing evaluation method by means of 3D heat transfer analysis. First, the model is validated for experimental data in the literature. Then, other parameters are investigated to assess their influence on the precision of pull-out fire tests. Studied parameters are: embedded part of the anchor, extended length of the anchor and concrete element insulation. Results show that the embedded depth has a significant influence on temperature profiles along the bond. Moreover, the external length of the anchor influences temperature profiles, but not beyond lengths beyond 20 mm from the concrete surface.

Domaines: Génie civil

Omar Al-Mansouri, Romain Mege, Nicolas Pinoteau, Sébastien Rémond, Mohamed Amine Lahouar, et al.. Experimental and numerical investigation of factors influencing thermal distribution and load-bearing capacity of bonded anchors under fire. The 3rd International Conference on Structural Safety Under Fire & Blast, Sep 2019, London, United Kingdom. ⟨hal-02479116⟩