Numerical investigation of parameters ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Numerical investigation of parameters influencing fire evaluation tests of chemically bonded anchors in uncracked concrete
Auteur(s) :
Al-Mansouri, Omar [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Mege, Romain [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Pinoteau, Nicolas [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Guillet, Thierry [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Piccinin, Roberto [Auteur]
Mcbride, Kenton [Auteur]
Rémond, Sébastien [Auteur]
Génie Civil [GC]
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Centre Scientifique et Technique du Bâtiment [CSTB]
Mege, Romain [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Pinoteau, Nicolas [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Guillet, Thierry [Auteur]
Centre Scientifique et Technique du Bâtiment [CSTB]
Piccinin, Roberto [Auteur]
Mcbride, Kenton [Auteur]
Rémond, Sébastien [Auteur]
Génie Civil [GC]
Titre de la revue :
Engineering Structures
Pagination :
110297
Éditeur :
Elsevier
Date de publication :
2020
ISSN :
0141-0296
Mot(s)-clé(s) en anglais :
adhesive resin
bonded anchor
fire tests
Resistance Integration Method
Thermal distribution
numerical model
bonded anchor
fire tests
Resistance Integration Method
Thermal distribution
numerical model
Discipline(s) HAL :
Sciences de l'ingénieur [physics]/Génie civil/Structures
Résumé en anglais : [en]
European guidelines for fire performance evaluation of post-installed anchoring systems are limited to mechanical (e.g., expansive, undercut) mechanisms of load transfer and the steel failure mode, whereas the adhesive ...
Lire la suite >European guidelines for fire performance evaluation of post-installed anchoring systems are limited to mechanical (e.g., expansive, undercut) mechanisms of load transfer and the steel failure mode, whereas the adhesive bond mechanism remains unaccounted for in chemically bonded anchors. Furthermore, current evaluation methods do not account for the influence of practical testing conditions on temperature profiles along the bonded depth. This paper presents 3D finite element thermal simulations of chemically bonded anchors in uncracked concrete exposed to ISO 834 fire conditions with comparisons to experimental specimens. Five parameters representing application and testing conditions are investigated to assess their influence on temperature profiles along the embedment depth of bonded anchors. A numerical model is proposed based on the results of the numerical simulations to determine thermal data necessary for predicting the load-bearing capacities of bonded anchors using the Resistance Integration Method. The model adopts Eurocode material properties for concrete and steel, with 3D analysis yielding conservative capacity prediction compared to physical fire tests. 3D and 2D simulation results are compared, demonstrating that modelling using 2D heat transfer analysis yields inaccurate temperature profiles compared to 3D modelling. After experimental validation of the proposed model, additional parameters are explored in a numerical parametric study: embedded depth, external length of the anchor element, insulation of the anchor element, and insulation of the concrete element. 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 20 mm from the concrete surface.Lire moins >
Lire la suite >European guidelines for fire performance evaluation of post-installed anchoring systems are limited to mechanical (e.g., expansive, undercut) mechanisms of load transfer and the steel failure mode, whereas the adhesive bond mechanism remains unaccounted for in chemically bonded anchors. Furthermore, current evaluation methods do not account for the influence of practical testing conditions on temperature profiles along the bonded depth. This paper presents 3D finite element thermal simulations of chemically bonded anchors in uncracked concrete exposed to ISO 834 fire conditions with comparisons to experimental specimens. Five parameters representing application and testing conditions are investigated to assess their influence on temperature profiles along the embedment depth of bonded anchors. A numerical model is proposed based on the results of the numerical simulations to determine thermal data necessary for predicting the load-bearing capacities of bonded anchors using the Resistance Integration Method. The model adopts Eurocode material properties for concrete and steel, with 3D analysis yielding conservative capacity prediction compared to physical fire tests. 3D and 2D simulation results are compared, demonstrating that modelling using 2D heat transfer analysis yields inaccurate temperature profiles compared to 3D modelling. After experimental validation of the proposed model, additional parameters are explored in a numerical parametric study: embedded depth, external length of the anchor element, insulation of the anchor element, and insulation of the concrete element. 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 20 mm from the concrete surface.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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