MR damping system for mitigating wind-rain induced vibration on Dongting Lake Cable-Stayed Bridge

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

“…The Dongting Lake Bridge in China, retrofitted with stay cable MR dampers, constitutes the first full-scale implementation of MR dampers in bridge structures 54,55 . Two MR dampers were mounted on each cable of the bridge to reduce cable vibrations induced by weather conditions (wind combined with rain); a total of 312 MR dampers were installed on 156 stay cables.…”

Adaptive Semiactive Cable Vibration Control: A Frequency Domain Perspective

“…Since its opening to traffic in the end of 2000, the cable-stayed Dongting Lake Bridge has been observed to have frequent occurrences of cable vibration under simultaneous action of rain and wind before the deployment of MR-based damping technology for cable vibration mitigation [14]. A typical cable of 121.9 m long in this bridge is selected for numerical verification of vibration control by installing a self-sensing MR damper at the location of 2.0% of the cable length ( = 0.02 ) from the deck-cable connection.…”

“…However, the passive dampers may potentially lead to insufficient damping to other concerned modes without increasing the damper installation location that may undesirably affect the esthetics of the bridge [12,13], especially for very long cables. Alternative promising solution to cable vibration mitigation is semiactive control based on controllable magnetorheological (MR) dampers due to their real-time adjustable damping effect, fail-safe behavior, and superior energy dissipation over passive dampers [2,6,[14][15][16][17][18][19][20][21][22][23][24][25].…”

A Magnetorheological Damper with Embedded Piezoelectric Force Sensor: Experiment and Modeling

“…While possessing controllable damping capability, the existing MR dampers are incapable of monitoring structural vibrations or excitations exerted on structures, and require extra sensors for implementing closed-loop semiactive control. As a consequence, the MR dampers are usually used as adjustable passive dampers in an open-loop mode in the current practices of civil structural control, like in vibration control of bridge cables (Chen et al, 2004;Weber et al, 2005a), which hinders full utilization of their controllable damping capability. Recently, a self-sensing MR damper embedded with a piezoelectric force sensor has been developed to possess dual functionality of force sensing and controllable damping; thus it has the potential to facilitate real-time closed-loop control in a relatively simple and cost-effective manner .…”