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ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110
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Aerodynamic Study of Two Cable Stayed Bridges in Poland
ABSTRAKT
The aerodynamic stability of a tender bridge is commonly studied when the wind conditions are known to be severe. In Poland strong winds are quite rare, but the experimental wind tunnel study of two recently built cable stayed bridges proved to be useful. If no catastrophic oscillation was to be expected, the deck's oscillation under moderate speed wind, due to vortex shedding, should have created some disturbance. This excitation was enhanced by the unusually small distance between the bridge's deck and the river surface, that created an interaction process. The deck's shape was modified by cornices and baffles and was stabilized. The physical modeling of the bridge subject to wind turbulence was also confirmed by a series of calculations.