کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
293062 | 511104 | 2013 | 19 صفحه PDF | دانلود رایگان |
Nonlinear aerodynamic effects on a multi-box deck section are both numerically and experimentally investigated. The basic hypothesis of the band superposition approach, a methodology to model the aeroelastic and buffeting terms of the wind loads acting on a bridge deck, is validated through specific wind tunnel tests on a sectional model. An improved version of the band superposition approach is proposed, introducing a rheological model for high frequency unsteady forces. The numerical model is validated against wind tunnel tests performed by means of an active turbulence generator and a multi-box deck sectional model. Finally, the linear and nonlinear approaches are compared with full scale simulations of the numerical response of a sectional bridge to an incoming real turbulent wind.
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► We validate experimentally the band superposition hypothesis for unsteady aerodynamic forces.
► We propose a rheological model for nonlinear unsteady high frequency forces.
► The rheological model is validated against specific wind tunnel tests.
► We compare the results of this nonlinear model with those of a standard linearized model.
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 113, February 2013, Pages 40–58