ORBi: Gernay Thomas - A multiaxial concrete model for applications in structural fire engineering

Reference : A multiaxial concrete model for applications in structural fire engineering


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/115505

Title :	A multiaxial concrete model for applications in structural fire engineering
Language :	English
Author, co-author :	Gernay, Thomas [Université de Liège - ULg > Département Argenco : Secteur SE > Ingénierie du feu >]
	Millard, Alain [Commissariat à l'Energie Atomique (Saclay) - CEA > Département de Modélisation des Systèmes et Structures > Service d'Etudes Mécaniques et Thermiques > >]
Publication date :	7-Jun-2012
Main document title :	Proceedings of the 7th International Conference on Structures in Fire
Editor :	Fontana, M.
	Frangi, A.
	Knobloch, M.
Publisher :	ETH Zurich
Pages :	531-540
On invitation :	No
Audience :	International
City :	Zurich
Country :	Switzerland
Event name :	7th International Conference on Structures in Fire
Event date :	June 6-8 2012
Event organizer :	ETH Zurich, EMPA Dubendorf
Event place (city) :	Zurich
Event country :	Switzerland
Keywords :	[en] Concrete model ; Plasticity ; Damage mechanics ; Structures in Fire
Abstract :	[en] Temperature-dependent material models are required in numerical softwares dedicated to the nonlinear analysis of structures in fire. Although structural concrete is widely used in civil engineering, proper modelling of its thermo-mechanical behaviour remains a challenging issue for engineers mainly because of the complexity of the phenomena that result from the microcracking process in this composite material and because of the lack of numerical robustness of the models. This paper presents a new multiaxial concrete model developed for the analysis of concrete structures in fire. The multiaxial model is based on a plastic-damage formulation and incorporates an explicit term for transient creep strain. After implementation in a finite element software for structural fire engineering calculations, numerical simulations have been performed to highlight the ability of the model to capture some of the main phenomena that develop in concrete (permanent strains, degradation of the elastic properties, unilateral effect) as well as the ability to be used for the fire analysis of large-scale structural elements.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/115505
DOI :	10.3929/ethz-a-0070501097

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