Non-Gaussian approach for equivalent static wind loads from wind tunnel measurements

Wafaa Kassir (1, 2) , Christian Soize (2) , Jean-Vivien Heck (1) , Fabrice de Oliveira (1)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 MSME - Laboratoire de Modélisation et Simulation Multi Echelle

A novel probabilistic approach is presented for estimating the equivalent static wind loads that produce a static response of the structure, which is " equivalent " in a probabilistic sense, to the extreme dynamic responses due to the unsteady pressure random field induced by the wind. This approach has especially been developed for complex structures (such as stadium roofs) for which the unsteady pressure field is measured in a boundary layer wind tunnel with a turbulent incident flow. The proposed method deals with the non-Gaussian nature of the unsteady pressure random field and presents a model that yields a good representation of both the quasi-static part and the dynamical part of the structural responses. The proposed approach is experimentally validated with a relatively simple application and is then applied to a stadium roof structure for which experimental measurements of unsteady pressures have been performed in boundary layer wind tunnel.

Mots clés: Polynomial chaos expansion; Quasi-static responses; Extreme value statistics.; Stochastic dynamics; Equivalent static wind loads; Non-Gaussian unsteady pressure field

Domaines: Mécanique des structures [physics.class-ph]; Structures; Mathématiques [math]

Wafaa Kassir, Christian Soize, Jean-Vivien Heck, Fabrice de Oliveira. Non-Gaussian approach for equivalent static wind loads from wind tunnel measurements. Wind and Structures, 2017, 25 (6), pp.589-608. ⟨10.12989/was.2017.25.6.589⟩. ⟨hal-01736361⟩