Reference : Global structural behaviour of a building frame further to its partial destruction by co...
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Engineering, computing & technology : Civil engineering
Global structural behaviour of a building frame further to its partial destruction by column loss
[fr] Comportement structural global de portiques de bâtiments suite à la perte d'une colonne
Luu, Nguyen Nam Hai [ > > ]
Demonceau, Jean-François mailto [Université de Liège - ULg > Département ArGEnCo > Département ArGEnCo >]
Jaspart, Jean-Pierre mailto [Université de Liège - ULg > Département Argenco : Secteur MS2F > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon. >]
EUROSTEEL 2008, 5th European Conference on Steel and Composite Structures
Ofner, Robert
Beg, Darko
Fink, Josef
Greiner, Richard
Unterweger, Harald
ECCS European Convention for Constructional Steelwork
3-5 Septembre 2008
Univesity of Graz, University of Ljubljana, University of Vienna
[en] Robustness ; Alternative load path ; Column loss
[en] In 1969, a catastrophic event occurred in UK at the Ronal Point residential building where the progressive collapse of the building, initiated by a localized gas explosion, was observed. Further to this event, some codes and standards, and in particular the British Standards, impose to the designer to ensure the structural integrity of building in order to avoid the progressive collapse of the latter further to an exceptional action.
In fact, the progressive collapse of a building is the result of a change in the structural system and of the load path associated to the loss of one or more main structural members. In other words, the existing load path is suddenly modified and the loads supported by the building are reported to the foundation through an alternative load path. Accordingly, the remaining structural members are overloaded by additional loads; the latter have to be able to support these loads and to possess a sufficient ductility.
In the last decade, researches on this topic were initiated at the Argenco Department of Liège University. The present paper reflects part of these activities; in particular, some investigations dedicated to the investigation of the behaviour of a frame further to a column loss are presented. In another article presented by J.F Demonceau, H.N.N. Luu and J.P Jaspart within the present conference is devoted to the investigation of the behaviour of the frame when significant membranar forces developed within the structure. In particular, in this paper, a simplified substructure which is able to simulate the behaviour of a structure further to a column loss is defined. The present paper presents the analytical methods requested to define the parameters influencing the response of the simplified substructure.

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