Study on the damping reduction of the safe-belt constraint system of low gravity center cable-stayed bridge
Ping Lu1, Haijun Wu2, Qing Li3, Wenxue Zhang4
1, 2College of Civil Engineering, Chongqing Jiaotong University, Chongqing, China
3, 4College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China
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Abstract. The structural system with better seismic performance is one of the key to the seismic design of cable-stayed bridges. The research shows that the internal force response of floating system is small and the displacement response is large, and the seismic response of the hinged system is the opposite. However, the tower bottom moment of the fix hinged cable-bridge could be less than it of the floating system actually, because the inertia force of the girder in the hinge system would be transmitted to the tower through the connection of tower and girder. In the light of these characteristics, a new low-gravity cable-stayed bridge seismic structure system, the safe-belt constraint system, is proposed in this paper, and the seismic response characteristics are studied by ANSYS. In addition, the effect of safe-belt parameters on the vibration reduction effect of the belt system cable-stayed bridge is analyzed.
Keywords: double tower cable-stayed bridge with low center of gravity, safe-belt constraint system, seismic response, acceleration activation threshold, curb stiffness, safe-belt sliding force.
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Cite this article
Lu Ping, Wu Haijun, Li Qing, Zhang Wenxue Study on the damping reduction of the safe‑belt constraint system of low gravity center cable‑stayed bridge. Vibroengineering PROCEDIA, Vol. 14, 2017, p. 184‑191.
© JVE International Ltd. Vibroengineering PROCEDIA. Oct 2017, Vol. 14. ISSN 2345-0533