Active Mass Damper for Reducing Wind and Earthquake Vibrations of a Long-Period Bridge
Open Access
- 7 August 2020
- Vol. 9 (3), 66
- https://doi.org/10.3390/act9030066
Abstract
An active mass damper (AMD) was developed that uses a linear motor and coil spring to reduce the vertical vibration of a long-period cable-stayed bridge subjected to wind and earthquake loads. A scaled-down bridge model and AMD were fabricated, and the control effect of the AMD was investigated experimentally and analytically. The AMD was controlled via a linear quadratic Gaussian algorithm, which combines a linear quadratic regulator and Kalman filter. The dynamic properties were investigated using a 1/10 scale indoor experimental model, and the results confirmed that the measured and analytical accelerations were consistent. A vibrator was used to simulate the wind-induced vibration, and the experimental and analytical results were consistent. The proposed AMD was confirmed to damp the free vibration and harmonic load and increase the damping ratio of the bridge model from 0.17% to 9.2%. Finally, the control performance of the proposed AMD was numerically investigated with the scaled-down bridge model subjected to the El Centro and Imperial Valley-02 earthquakes. These results were compared with those of a TMD, and they confirmed that the proposed AMD could reduce excessive vertical vibrations of long-period cable-stayed bridges subjected to wind and earthquakes.Keywords
Funding Information
- Gwangju University (2020)
This publication has 28 references indexed in Scilit:
- Numerical Study of the Active Tendon Control of a Cable-Stayed Bridge in a Construction PhaseShock and Vibration, 2014
- Study on Wind-Induced Vibration Control of a Long-Span Cable-Stayed Bridge Using TMD-Type CounterweightJournal of Bridge Engineering, 2014
- Numerical and experimental dynamic analysis and control of a cable stayed bridge under parametric excitationEngineering Structures, 2012
- Reduction of Vibrations of Pedestrian Bridges Using Tuned Mass Dampers (TMD)Archives of Acoustics, 2010
- Semi-active fuzzy control of cable-stayed bridges using magneto-rheological dampersEngineering Structures, 2007
- Seismic control of cable-stayed bridge using semi-active hybrid systemBridge Structures, 2006
- The Generalized Energy Method for the Formulation of the Equations of Motion in Classical MechanicsPhysica Scripta, 2002
- Suppression of wind-induced instabilities of a long span bridge by a passive deck–flaps control system: Part I: FormulationJournal of Wind Engineering and Industrial Aerodynamics, 2000
- LQG/LTR Control Methodology in Active Structural ControlJournal of Engineering Mechanics, 1998
- A practical method of passive TMD for suppressing wind-induced vertical buffeting of long-span cable-stayed bridges and its applicationJournal of Wind Engineering and Industrial Aerodynamics, 1994