Journal
ENGINEERING STRUCTURES
Volume 69, Issue -, Pages 62-71Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2014.03.001
Keywords
Suspension bridges; Aeroelastic instabilities; Flutter; Post-flutter; Hysteretic tuned mass dampers; Vibration control
Categories
Funding
- PRIN [2010BFXRHS-002]
- US National Science Foundation [NSF-CMMI-1031036]
- MIUR
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Systems of hysteretic tuned mass dampers are proposed for multi-mode flutter mitigation in long-span suspension bridges. The performance of the nonlinear absorbers is systematically compared with that of classical damped (linearly viscoelastic) absorbers. The equations of motion ensuing from a linearized parametric structural model of a suspension bridge are coupled with the equations governing the dynamics of the passive nonlinear control system and the time-dependent aerodynamic loads obtained through a quasi-steady nonlinear formulation and the unsteady indicial theory. The equations of the controlled aeroelastic system are reduced employing the Faedo-Galerkin method. Numerical simulations are performed to investigate the effectiveness of the vibration absorbers system comparing both the onset of flutter and the post-flutter behavior without the control devices with the corresponding responses obtained when multiple absorbers are installed. (c) 2014 Elsevier Ltd. All rights reserved.
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