Sécurite incendie - Sécurité incendie et calcul de la résistance au feu des bâtiments en acier selon l'Eurocode 3

Book published by Infosteel (2012)

Ce livre traite, dans ses trois premiers chapitres, de la sécurité incendie et du calcul de la résistance au feu des structures de bâtiments en acier selon l'Eurocode 3. Le chapitre 1 définit les ... [more ▼]

Ce livre traite, dans ses trois premiers chapitres, de la sécurité incendie et du calcul de la résistance au feu des structures de bâtiments en acier selon l'Eurocode 3. Le chapitre 1 définit les objectifs de la sécurité incendie sur la base du déroulement d'un incendie et examine les mesures que le concepteur peut prendre afin de répondre aux exigences de sécurité incendie et aux exigences réglementaires. Le chapitre 2 traite du calcul de la résistance au feu de structures en acier pour ce qui concerne le critère de capacité portante. Un modèle de calcul simple est donné dans les Eurocodes pour les éléments tendus, les colonnes et les poutres soumises ou non au déversement. Pour le calcul des poutres intégrées, qu’elles soient protégées ou non, on peut utiliser un modèle de calcul avancé, mais une méthode alternative simple est décrite dans cet ouvrage. Le chapitre 3 traite de l'ingénierie de la sécurité incendie, une discipline relativement nouvelle qui utilise les modèles physiques pour décrire le déroulement d'un incendie et ses effets sur le bâtiment et ses occupants. On évoque quatre situations qui nécessitent l’utilisation de l'ingénierie de la sécurité incendie, à savoir: les feux localisés, les feux de compartiment (avec ou sans embrasement généralisé), le cas des structures en acier situées à l'extérieur du bâtiment et celui où l’on considère le comportement d’ensemble d’une ossature. Ce dernier cas est illustré par l’étude de l’effet membranaire d’un système de plancher. Enfin, le chapitre 4 contient treize tableaux de dimensionnement qui donnent directement certains paramètres de calcul comme la réduction de la limite d’élasticité efficace, celle du module d’élasticité de l’acier, le niveau de chargement en situation d’incendie, le facteur de massiveté des sections en I, la température atteinte dans l’acier après un certain temps (pour divers valeurs de ce facteur de massiveté) et la température critique des colonnes (en fonction de leur niveau de chargement et de leur élancement). [less ▲]

Recent developments on composite connections: behaviour of joints subjected to sagging bending moments and presentation of a free design dedicated software

in EUROSTEEL 2008, 5th European Conference on Steel and Composite Structures (2008, September)

In Eurocode 4, design rules are suggested for the evaluation of the mechanical properties of structural steel-concrete composite joints (rotational stiffness, resistance and ductility). These rules cover ... [more ▼]

In Eurocode 4, design rules are suggested for the evaluation of the mechanical properties of structural steel-concrete composite joints (rotational stiffness, resistance and ductility). These rules cover situations where the joints are subjected to moments and shear forces, but in hogging regions only. Recently, researches have been conducted on the behaviour of composite joints subjected to sagging bending moments and to combined bending moments and axial loads, types of loadings which appear in composite frame further to a column loss. In the present paper, recent developments allowing to extend the EC4 design rules to joints in sagging regions (loading which can occur, for instance, in sway composite frames) are presented and the proposed method is validated through comparisons with experimental test results. Also, an easy-to-apply design software (which will be freely available), applying the rules recommended in Eurocode 4 in a safe and easy way, is described. [less ▲]

Eurocode 4 EN 1994: Exemples d'application au calcul des structures mixtes acier - béton

in Jaspart, Jean-Pierre; Maquoi, René; Demonceau, Jean-François (Eds.) et al Eurocode 4 EN 1994: Exemples d'application au calcul des structures mixtes acier - béton (2007)

Dynamic approach of structural fire calculation with FEM software

in Proc. 5th International Conference on Performance-Based Codes and Fire Safety Design Methods (2004)

This paper explains how the dynamic approach has been implemented in the computer software SAFIR in order to cope with temporary and local failures that occured in a step be step static analysis of ... [more ▼]

This paper explains how the dynamic approach has been implemented in the computer software SAFIR in order to cope with temporary and local failures that occured in a step be step static analysis of structures subjected to fire.By means of this recently implemented dynamic algorithm, it’s now possible to simulate the complete failure mechanism, to predict the influence of a local failure on the global behaviour of the structure and to follow eventually the progressive collapse. Therefore the resistance time is now really determined whereas in the past many numerical failure corresponding to local failure were interpreted as resistance time of the whole structure. [less ▲]

Development of design rules for steel structures subjected to natural fires in closed car parks

Report (1999)

Buckling curves of hot rolled H steel sections submitted to fire

Report (1998)

Report of the research work at the base of the design equation introduced in Eurocode 3 (EN 1993-1-2) for the stability of steel columns under axial loading or combined axial and bending loading.

Connection between parametric temperature-time curves and Equivalent time of fire exposure

in IABSE report (1996)

It is shown that the Time Equivalent concept does not match exactly with the parametric fire model ofd Eurocode 1. Furthermore, the time equivalent depends on the particular type of structure and should ... [more ▼]

It is shown that the Time Equivalent concept does not match exactly with the parametric fire model ofd Eurocode 1. Furthermore, the time equivalent depends on the particular type of structure and should, therefore, be seen as an out dated concept. [less ▲]

A Simple Model for the Fire Resistance of Axially-Loaded Members According to Eurocode 3

in Journal of Constructional Steel Research (1995), 35

New buckling curves have been developed for axialy loaded steel members subjected to fire. The model is based on extensive numerical simulations calibrated on several dozens of full scale experimental ... [more ▼]

New buckling curves have been developed for axialy loaded steel members subjected to fire. The model is based on extensive numerical simulations calibrated on several dozens of full scale experimental test results. This model has been subsequently included in Eurocode 3. [less ▲]

Computer model for the fire resistance of composite structures

in Congrès International de l'AIPC, Bruxelles 1990 (1990)