Reference : Principal Static Wind Loads on a large roof structure
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
Principal Static Wind Loads on a large roof structure
Blaise, Nicolas mailto [Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil >]
Hamra, Lotfi mailto [Université de Liège - ULiège > Département Argenco : Secteur MS2F > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon. >]
Denoël, Vincent mailto [Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil >]
Proceedings of the 12th ANIV conference of wind engineering In Vento
XII Convegno Nazionale di Ingegneria del Vento
7-10 Octobre 2012
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
[en] Buffeting wind analysis ; envelope value ; extreme value ; equivalent static wind loads ; singular value decomposition
[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.

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