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Structures subjected to low-level blast loads / Martien Teich in Journal of structural engineering, Vol. 138 N° 5 (Mai 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 5 (Mai 2012) . - pp.625–635. Titre : Structures subjected to low-level blast loads : Analysis of aerodynamic damping and fluid-structure interaction Type de document : texte imprimé Auteurs : Martien Teich, Auteur ; Norbert Gebbeken, Auteur Année de publication : 2012 Article en page(s) : pp.625–635. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Fluid-structure  interaction  (FSI)  Flexible  protective  structures  Aerodynamic  damping  Response  spectrum  Damping  energy Résumé : This paper presents the structural behavior of idealized linear single-degree-of-freedom systems subjected to weak blast loads. The authors derive a new coupling model taking into account fluid-structure interaction (FSI) and aerodynamic damping resulting from the surrounding air. This model contributes to a better understanding of the physical coupling phenomena and can be used for the validation of more complex numerical models. Especially mass and stiffness determine the effects of aerodynamic damping and FSI on the deformations, internal forces, and energy contributions. Although the coupling effects are negligible for stiff or heavy systems (e.g., reinforced concrete structures), they significantly influence the structural response of flexible and light systems (e.g., membrane structures or glazing facades). On the basis of the new coupling model, the authors derive a decoupled model incorporating aerodynamic damping and FSI effects. This decoupled model is derived on the basis of an equivalent viscous damping ratio depending on mass and structural stiffness. Finally, a response spectrum is derived, synthesizing the discussed results. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000493 [article] Structures subjected to low-level blast loads : Analysis of aerodynamic damping and fluid-structure interaction [texte imprimé] / Martien Teich, Auteur ; Norbert Gebbeken, Auteur . - 2012 . - pp.625–635. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 5 (Mai 2012) . - pp.625–635. Mots-clés : Fluid-structure  interaction  (FSI)  Flexible  protective  structures  Aerodynamic  damping  Response  spectrum  Damping  energy Résumé : This paper presents the structural behavior of idealized linear single-degree-of-freedom systems subjected to weak blast loads. The authors derive a new coupling model taking into account fluid-structure interaction (FSI) and aerodynamic damping resulting from the surrounding air. This model contributes to a better understanding of the physical coupling phenomena and can be used for the validation of more complex numerical models. Especially mass and stiffness determine the effects of aerodynamic damping and FSI on the deformations, internal forces, and energy contributions. Although the coupling effects are negligible for stiff or heavy systems (e.g., reinforced concrete structures), they significantly influence the structural response of flexible and light systems (e.g., membrane structures or glazing facades). On the basis of the new coupling model, the authors derive a decoupled model incorporating aerodynamic damping and FSI effects. This decoupled model is derived on the basis of an equivalent viscous damping ratio depending on mass and structural stiffness. Finally, a response spectrum is derived, synthesizing the discussed results. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000493