Abstract
With the increase of the running speed of high-speed trains, the longitudinal vibration of the long span railway cable-stayed bridge under train loads has increased significantly. And the probability of high-speed train braking is greater than earthquake. The excessive vibration response will affect the serviceable of the cable-stayed bridge. Fluid viscous dampers (FVDs) and elastic cables (ECs) which are widely used in seismic design of the bridge are adopted to control the longitudinal vibration response of the cable-stayed bridge induced by train braking loads. The influence of the design parameters of FVDs and ECs on the response of the bridge is studied. And the effectiveness of FVDs and ECs on mitigating the longitudinal response of the bridge is also discussed. It is found that installing FVDs and ECs between the deck and the tower is very efficient in reducing the longitudinal vibration of the railway cable-stayed bridge subjected to train braking loads, especially the longitudinal displacement of the deck and the bending moment of the tower.
Highlights
Cable-stayed bridges are currently popular in the world
This paper presents the longitudinal vibration of the cable-stayed bridge subjected to high-speed train braking
The results indicate that the use of Fluid viscous dampers (FVDs) is beneficial for the reduction in dynamic response of the cable-stayed bridge under high-speed train braking loads, especially the longitudinal displacement of the deck and the bending moment of the tower
Summary
Cable-stayed bridges are currently popular in the world. With the development of the high-speed railway, many railway cable-stayed bridges are applied to the construction in China. The longitudinal vibration of the cable-stayed bridge subjected to train braking must be controlled by various effective devices. Shan[8] found that FVDs with reasonable parameters were effective to mitigate the longitudinal response of the cable-stayed bridge under train braking loads and it was well to dissipate earthquake energy. Yang[9] investigated the effect of MR dampers on controlling the response of a suspension bridge under vehicle braking loads and earthquake, it showed that the performance of the bridge with a mixed control system was good. These previous literatures referred the longitudinal vibration of the bridge focus on the seismic loads. The effectiveness of FVDs and ECs on mitigating the longitudinal vibration of the bridge is discussed
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