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Seismic response control of a cable‐stayed bridge using negative stiffness dampers
The seismic behavior of a cable‐stayed bridge incorporated with negative stiffness dampers (may be active or semi‐active dampers, simulated by pseudo‐viscoelastic (P‐VE) dampers) between the tower and deck is investigated. First, the relationship of bridge damping ratio and connection stiffness between the middle tower and deck is deduced from a simplified cable‐stayed bridge model. The maximum damping ratio of the cable‐stayed bridge occurs when the optimum connection stiffness is reached. It is found that the optimum connection stiffness is composed of two negative values, indicating that the damper stiffness should be taken to be negative. Furthermore, the nonlinear seismic behavior of the cable‐stayed bridge with P‐VE dampers is studied through the numerical simulations. The reduction in the seismic response of the cable‐stayed bridge incorporated with the negative stiffness dampers is demonstrated. The influence of the stiffness of P‐VE dampers on the seismic behavior of cable‐stayed bridges is investigated. The results indicate that the seismic performance of the cable‐stayed bridge is the best and the damping ratio of the bridge achieves its maximum value when the damper stiffness is optimum. The optimum stiffness for the bridge at nonlinear stage is identical to that at linear phase. Copyright © 2009 John Wiley & Sons, Ltd.
Seismic response control of a cable‐stayed bridge using negative stiffness dampers
The seismic behavior of a cable‐stayed bridge incorporated with negative stiffness dampers (may be active or semi‐active dampers, simulated by pseudo‐viscoelastic (P‐VE) dampers) between the tower and deck is investigated. First, the relationship of bridge damping ratio and connection stiffness between the middle tower and deck is deduced from a simplified cable‐stayed bridge model. The maximum damping ratio of the cable‐stayed bridge occurs when the optimum connection stiffness is reached. It is found that the optimum connection stiffness is composed of two negative values, indicating that the damper stiffness should be taken to be negative. Furthermore, the nonlinear seismic behavior of the cable‐stayed bridge with P‐VE dampers is studied through the numerical simulations. The reduction in the seismic response of the cable‐stayed bridge incorporated with the negative stiffness dampers is demonstrated. The influence of the stiffness of P‐VE dampers on the seismic behavior of cable‐stayed bridges is investigated. The results indicate that the seismic performance of the cable‐stayed bridge is the best and the damping ratio of the bridge achieves its maximum value when the damper stiffness is optimum. The optimum stiffness for the bridge at nonlinear stage is identical to that at linear phase. Copyright © 2009 John Wiley & Sons, Ltd.
Seismic response control of a cable‐stayed bridge using negative stiffness dampers
Li, Hui (author) / Liu, Jinlong (author) / Ou, Jinping (author)
Structural Control and Health Monitoring ; 18 ; 265-288
2011-04-01
24 pages
Article (Journal)
Electronic Resource
English
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