Damage prevention and aerodynamics of cable-stayed bridges in heavy snowstorms: A case study (CROSBI ID 318993)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bulić, Mladen ; Čaušević, Mehmed
engleski
Damage prevention and aerodynamics of cable-stayed bridges in heavy snowstorms: A case study
This paper begins by analyzing cable vibrations due to external excitations and their effects on the overall dynamic behavior of cable-stayed bridges. It is concluded that if the natural frequency of a cable approaches any natural frequency of the bridge, the cable loses its rigidity and functionality. The results of this analysis explain the phenomenon that occurred on the Dubrovnik Bridge in Croatia during a storm and measures for its retrofit. A field test was conducted before the bridge was opened to traffic. It was concluded: “The Bridge excited unpleasant transverse superstructure vibration with the frequency of approximately 0.470 Hz. Hence, it seems possible that a pair of stays vibrating in phase may excite deck vibrations”. Soon after this Bridge opened, a storm dumped heavy damp snow in the area, causing the six longest cable stay pairs of the main span to undergo large-amplitude vibrations, and the superstructure underwent considerable displacements in combined torsion- sway and bending modes. This necessitated rehabilitation measures for the Bridge including devices to suppress the large-amplitude vibrations of cables. The rehabilitation and monitoring of the Bridge are also presented here.
adaptive cable damper (ACD) ; aerodynamics ; cable-stayed bridge ; monitoring ; rehabilitation ; vibrations
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Podaci o izdanju
85 (1)
2023.
81-88
objavljeno
1225-4568
1598-6217
10.12989/sem.2023.85.1.081