000004905 001__ 4905
000004905 005__ 20141119144603.0
000004905 04107 $$aeng
000004905 046__ $$k2002-06-02
000004905 100__ $$aElghazouli, Ahmed Y.
000004905 24500 $$aREALISTIC MODELLING OF COMPOSITE FLOOR SLABS UNDER FIRE CONDITIONS Bassam A. Izzuddin1, Member ASCE

000004905 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004905 260__ $$bColumbia University in the City of New York
000004905 506__ $$arestricted
000004905 520__ $$2eng$$aThis paper describes two alternative strategies for modelling the response of composite floor slabs under fire conditions. The first strategy is based on a grillage approximation with 1D elasto-plastic elements, whereas the second strategy employs a more realistic representation based on a newly developed 2D flat shell element. In addition to the modelling of geometric and material nonlinearities, the new 2D shell element incorporates an essential capability of representing geometrically orthotropic slabs, achieved through modifying the Reissner-Mindlin hypothesis. Following a description of the aforementioned 1D and 2D element formulations, a comparative study is undertaken on a composite floor slab subject to ambient and fire loading conditions, where consideration is given to different edge restraint conditions. The study shows that grillage modelling can significantly overestimate the resistance of the composite slab in the large displacement range, particularly in the absence of planar edge restraints. It is therefore suggested that realistic modelling of composite floor slabs using the newly developed 2D shell element is a most effective approach for an adequate response assessment under extreme loading conditions, such as due to fire.

000004905 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004905 653__ $$afloor slabs, composite structures, nonlinear analysis, fire conditions.

000004905 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004905 720__ $$aElghazouli, Ahmed Y.$$iTao, Xiaoya
000004905 8560_ $$ffischerc@itam.cas.cz
000004905 8564_ $$s575391$$uhttp://invenio.itam.cas.cz/record/4905/files/520.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004905 962__ $$r4594
000004905 980__ $$aPAPER