References of "Peigneux, Christophe"
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See detailConsideration of local instabilities by constituve law in a beam element in fire conditions
Peigneux, Christophe ULg; Franssen, Jean-Marc ULg

Conference given outside the academic context (2011)

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See detailEvaluation of Structural Fire Performance. Today and Tomorrow
Franssen, Jean-Marc ULg; Gernay, Thomas ULg; Hanus, François ULg et al

Conference given outside the academic context (2010)

The most recent applications in evaluation of structural fire performance performed at the University of Liege are described. Five topics are discussed: analysis of 3D structures, joints in steel ... [more ▼]

The most recent applications in evaluation of structural fire performance performed at the University of Liege are described. Five topics are discussed: analysis of 3D structures, joints in steel structures, spalling in concrete structures, cellular beams and tensile membrane action. [less ▲]

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See detailParametrical study on the behaviour of steel and composite cellular beams under fire conditions
Vassart, Olivier; Bailey, C. G.; Bihina, Gisèle et al

in Kodur, Venkatesh; Franssen, Jean-Marc (Eds.) Structures in Fire. Proceedings of the Sixth International Conference (2010)

This paper describes an extensive parametric study on the behaviour of cellular beam under fire conditions. Different finite element models using shell elements were developed considering both material ... [more ▼]

This paper describes an extensive parametric study on the behaviour of cellular beam under fire conditions. Different finite element models using shell elements were developed considering both material and geometrical non-linearity; CAST3M [1], ANSYS [2] and another one in SAFIR [3]. They were calibrated on the basis of a new experimental test campaign performed in the scope of the project FICEB+ [4] funded by the Research Fund for Coal and Steel. The comparison between the finite element prediction and actual experimental results showed a good agreement in terms of failure modes, load deflection relationship and ultimate loads. At failure, temperature measured during the fire tests indicated that failure arising by web post buckling of cellular beams in fire cannot be simply estimated by applying temperature dependent reduction factors on strength alone, as given in codes. A design model representing the behaviour of cellular beam in fire conditions has been developed by Vassart [5-7]. This design model is able to predict the complex behaviour of cellular beam in case of fire comprising web-post buckling and Vierendeel bending, as well as standard flexural bending. The results of the Finite Element Models are compared in terms of critical temperatures and failure mode obtained using the design model. This paper also contains some tests results that were used to calibrate the FEM model and the comparison between analytical and FEM models. [less ▲]

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See detailCIMEDE : Pré-dimensionnement des solutions de plancher
Peigneux, Christophe ULg; Franssen, Jean-Marc ULg

Report (2009)

Ce présent rapport a pour but d’expliquer la démarche de dimensionnement poursuivie pour les 6 solutions de plancher retenues. Ce rapport ne fournit pas un dimensionnement exact des structures de plancher ... [more ▼]

Ce présent rapport a pour but d’expliquer la démarche de dimensionnement poursuivie pour les 6 solutions de plancher retenues. Ce rapport ne fournit pas un dimensionnement exact des structures de plancher étudiées mais fournit un pré-dimensionnement. Ce dernier a été réalisé sur base d’une série d’hypothèses permettant de simplifier le modèle de calcul. Les dimensions obtenues ne sont dès lors probablement pas les dimensions exactes des éléments structurels mais permettent d’obtenir un ordre de grandeur des dimensions et de la quantité de matériau nécessaire. Le pré-dimensionnement est effectué sur base de l’Eurocode EN 1995-1-1 pour les solutions en bois et EN 1994-1-1 pour les solutions mixtes acier-béton. L’hypothèse principale que nous effectuons est de supposer une connexion complète entre les différents éléments dans le cas d’une solution mixte (acier-béton, bois-bois, bois-acier, …). Cette hypothèse engendre comme conséquence directe que nous sous-estimons les flèches. En effet, nous négligeons le glissement qui pourrait se produire à l’interface des éléments. Pour contre à cela, nous garderons une réserve de l’ordre de 20% sur les flèches par rapport à la limite admissible. En effet, en phase de pré-dimensionnement, il n’est pas judicieux de déjà procéder au calcul des connecteurs et donc à la détermination du degré de connexion entre éléments. [less ▲]

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See detailLe comportement des tôles courbes comprimées et raidies longitudinalement
Peigneux, Christophe ULg

Master's dissertation (2009)

The current architectural trends show a growing desire to design bridges including curved compressed and longitudinally stiffened plates. Designers are increasingly faced with the problem of designing ... [more ▼]

The current architectural trends show a growing desire to design bridges including curved compressed and longitudinally stiffened plates. Designers are increasingly faced with the problem of designing such plates. There is currently no analytical approach to solve this problem. The solution consists in performing numerical simulations. However, this solution is very costly in both time and resources. The purpose of this work is to propose a simple analytic method for the design of curved longitudinally stiffened compressed plates. This approach consists in adapting the rules of the Eurocode EN 1993, part 1.5 (valid only for plane plates) on the basis of the foundations of the approach applicable to curved plates compressed but not stiffened. The aim is to allow the characterization of the loss in efficiency due to the curvature of the plate in the presence of longitudinal stiffeners. First, we performed a series of numerical simulations using the nonlinear finite element analysis program FINELG. The purpose of these simulations is twofold : on the one hand to analyze and to understand the behaviour of curved longitudinally stiffened plates ; secondly to obtain a representative set of ultimate loads that we can use in the future to validate the proposed methods. Three analytical design approaches were considered, each based on the general principle of replacing the basic plate by an equivalent isotropic plate whose parameters are adjusted accordingly. The three techniques differ in the principle of equivalence used. Two of these solutions have achieved promising results. [less ▲]

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