Reference : Principal Static Wind Loads on a large roof structure

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/131982

Title :	Principal Static Wind Loads on a large roof structure
Language :	English
Author, co-author :	Blaise, Nicolas [Université de Liège - ULg > Département ArGEnCo > Analyse sous actions aléatoires en génie civil >]
	Hamra, Lotfi [Université de Liège - ULg > Département Argenco : Secteur MS2F > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon. >]
	Denoël, Vincent [Université de Liège - ULg > Département ArGEnCo > Analyse sous actions aléatoires en génie civil >]
Publication date :	7-Oct-2012
Main document title :	Proceedings of the 12th ANIV conference of wind engineering In Vento
On invitation :	No
Audience :	International
Event name :	XII Convegno Nazionale di Ingegneria del Vento
Event date :	7-10 Octobre 2012
Event organizer :	Claudio BORRI e Enzo SIVIERO (presidenti) Vita GENNARO (segretario) Gianni BARTOLI Luisa BERTO Tommaso FAVARETTO Massimiliano GIOFFRE' Marco Giovanni GIOMETTO Claudio MANNINI Enzo MARINO Enrico MAZZAROLO Anna SAETTA Dario TRABUCCO
Event place (city) :	Venise
Event country :	Italie
Keywords :	[en] Buffeting wind analysis ; envelope value ; extreme value ; equivalent static wind loads ; singular value decomposition
Abstract :	[en] Usually, structural wind design is realized using static wind loads. Such loadings are expected, as a main property, to recover by static analyses, the envelope values that would be obtained by a formal buffeting analysis. For simple structures, equivalent static wind loads might be used but they are established in order to reproduce envelope values of specific structural responses and are thus not suitable to reconstruct efficiently the entire envelope. Recently, more general methods were derived to propose global static loadings that reconstruct the entire envelope but several drawbacks remained as their robust applicability for any structure and accuracy. This paper addresses a new type of static loadings, the principal static wind loads, derived in a strict mathematical way, the singular value decomposition, to make it optimum for the envelope reconstruction problem. The method is illustrated with a large roof and the reconstruction accuracy is analysed by studying the rate of envelope reconstruction, envelope previously obtained by a rigourous stochastic analysis. The way principal loadings are derived makes them suitable for combinations in order to increase the rate of the envelope reconstruction. As a major outcome, the method provides a finite number of design load cases that matches a desired level of accuracy in the envelope reconstruction.
Permalink :	http://hdl.handle.net/2268/131982

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