Behaviour of cellular beams protected with intumescent coatings

Brahim, Lamri; Mesquita, L.M.R.; Kada, Abdelhak; Piloto, P.A.G.

Publication

Behaviour of cellular beams protected with intumescent coatings

2016Conference object

dc.contributor.author	Brahim, Lamri
dc.contributor.author	Mesquita, L.M.R.
dc.contributor.author	Kada, Abdelhak
dc.contributor.author	Piloto, P.A.G.
dc.date.accessioned	2018-04-09T09:01:34Z
dc.date.available	2018-04-09T09:01:34Z
dc.date.issued	2016
dc.description.abstract	A new engineering practice in modern buildings is to use beams with web openings to allow the passage of services within the depth of the beam instead of underneath the beam. This helps to reduce the floor height of the building and optimises the available space. The openings are cut in the web of a beam or a beam profile cut and re-welded to form the so called cellular beam. Usually the bending resistance is increased, in comparison to the original solid section, but the failure mode occurs generally at lower critical temperatures. The failure mode in fire is related to the distance between holes, web post slenderness in addition to the web and flange section factor. The loss of the beam strength with temperature promotes an early web post failure that occurs before the section reaches the critical temperature, reason why an increase in the fire protection may be required for these beams to achieve the same fire resistance time as the equivalent solid beams. Recent research on beams with closely spaced web openings has shown that the web posts between adjacent openings become significantly hotter than the bottom flange of the section, and that web post buckling can often be the failure mode for a member in the fire condition. The present study aims at investigating the behaviour of cellular beams under fire conditions when considering unprotected and intumescent protected cellular steel beams. Experimental tests are conducted in both cases with and without protection where temperature profiles are produced and analysed. The behaviour of the intumescent fire protection with different properties and thicknesses is studied and compared using fire resistance tests. Simplified method of analysis and finite element models are used to study and compare results from tests.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Brahim, Lamri; Mesquita, L.M.R.; Kada, Abdelhak; Piloto, P.A.G. (2016). Behaviour of cellular beams protected with intumescent coatings. In 5th workshop on Urban fires Safety. Lisboa, Portugal	pt_PT
dc.identifier.uri	http://hdl.handle.net/10198/16760
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.subject	Cellular beams	pt_PT
dc.subject	Intumescent coatings	pt_PT
dc.subject	Fire protection	pt_PT
dc.subject	Fire tests	pt_PT
dc.subject	Critical temperature	pt_PT
dc.title	Behaviour of cellular beams protected with intumescent coatings	pt_PT
dc.type	conference object
dspace.entity.type	Publication
oaire.citation.conferencePlace	Lisboa, Portugal	pt_PT
oaire.citation.title	5th workshop on Urban fires Safety	pt_PT
person.familyName	Mesquita
person.familyName	Piloto
person.givenName	Luís M.R.
person.givenName	Paulo A.G.
person.identifier	1339117
person.identifier.ciencia-id	401E-2FEC-8303
person.identifier.ciencia-id	0519-449D-6F13
person.identifier.orcid	0000-0002-2385-4282
person.identifier.orcid	0000-0003-2834-0501
person.identifier.rid	F-2269-2010
person.identifier.rid	B-4866-2008
person.identifier.scopus-author-id	8585923500
person.identifier.scopus-author-id	6506406159
rcaap.rights	openAccess	pt_PT
rcaap.type	conferenceObject	pt_PT
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