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- W2353838791 abstract "To study vortex-induced resonance characteristics and anti-vibration measures' mechanism of centralslotted box girders, the large-scale sectional model vibration measurement, pressure measurement and CFD were employed. A long-span cable-stayed bridge over Yangtze River was taken as an example to conduct wind tunnel tests of large-scale sectional model. The test results indicated that it is the maintenance rails located inside aerodynamic susceptible sites that cause the vortex-induced vibration of the bridge. CFD numerical simulation results showed that the upwind flow passing through the curved soffit plate is hindered by the inside maintenance rails to cause an increased width of dead water region in the wake of upwind box section,a continuous and intensive vortex shedding phenomenon occurs due to velocity gradient and the VIV of the bridge main beam section takes place; accordingly,the inside maintenance rails are proposed to offset the center line of the main beam with a certain distance,they are not an obstacle to the highspeed upwind flow; thus the flow separates at the location far away from the knuckle line and the size of dead water region in the upwind box wake is reduced to prevent the vortex shedding. The static pressure test results showed that when shifting the inside maintenance rails,the negative mean pressure at the soffit plate knuckle line,does not change dramatically,the fluctuating pressures on the upwind and downwind inclined panels can be reduced,and the fluctuating energy is dispersed without a consistent predominant frequency. Wind tunnel tests for the modified section were conducted and the results showed that the VIV of the bridge can be suppressed completely." @default.
- W2353838791 created "2016-06-24" @default.
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- W2353838791 date "2015-01-01" @default.
- W2353838791 modified "2023-09-28" @default.
- W2353838791 title "Vortex-induced resonance characteristics and anti-vibration measures' mechanism of central-slotted box girders" @default.
- W2353838791 hasPublicationYear "2015" @default.
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