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Numerical simulation of the wind action on a long-span bridge deck

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Numerical simulation of the wind action on a long-span bridge deck

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Título Numerical simulation of the wind action on a long-span bridge deck
Autor Braun, Alexandre Luis
Awruch, Armando Miguel
Abstract A numerical model to study the aerodynamic and aeroelastic bridge deck behavior is presented in this paper. The flow around a rigid fixed bridge cross-section, as well as the flow around the same cross-section with torsional motion, are investigated to obtain the aerodynamic coefficients, the Strouhal number and to determine the critical wind speed originating dynamic instability due to flutter. The two-dimensional flow is analyzed employing the pseudo-compressibility approach, with an Arbitrary Lagrangean-Eulerian (ALE) formulation and an explicit two-step Taylor-Galerkin method. The finite element method (FEM) is used for spatial discretization. The structure is considered as a rigid body with elastic restrains for the cross-section rotation and displacement components. The fluid-structure interaction is accomplished applying the compatibility and equilibrium conditions at the fluid-solid interface. The structural dynamic analysis is performed using the classical Newmark’s method.
Contido em Journal of the Brazilian Society of Mechanical Sciences and Engineering. Rio de Janeiro, RJ. Vol. 25, No. 4 (oct./dec.2003), p. 352-363
Assunto Elementos finitos
Interação fluido-estrutura
Vento : Estruturas : Pontes
[en] Aerodynamics
[en] Aeroelasticity
[en] Finite Element Method (FEM)
[en] Fluid-structure interaction
[en] Large Eddy Simulation (LES)
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/75778
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