The experimental verification of the air flow simulation [Elektronski vir]
Štrukelj, Andrej, 1962- ; Pipenbaher, Marjan
In many places bridges are exposed to winds of high velocities. In that case two problems occur. The first one is the influence of the wind on the bridge structure especially during the critical ...phases of construction, and the second one is the influence of the wind on the traffic safety during the exploitation period. During the construction of the Slovenian highway network some large viaducts have been built. The largest one (length 1065 m, width 27.1 m and with a height of the main structure over 100m above the ground) is now in final stage of construction. Since the viaduct is positioned near the Adriatic coast it is exposed to very strong north-east and south-west winds. They occur very often especially during the weather changes, mostly in the late autumn, winter and early spring period of the year. The velocity of the wind called Bora can reach the speed up to 200 kmžh. To assure a safe passing of the traffic over the viaduct a special wind barrier was designed. It shouldreduce the wind load on the vehicles so that the safe traffic would be possible even at wind speeds of 140km per hour. It should be transparent in order to avoid the feeling of driving through a tunnel and make the passengersenjoy a spectacular view. The elements of the wind barrier should bedesigned in special shapes to remain stable during the strongest winds from different directions and at extreme temperatures. The barrier should also be easy to clean and maintain. The solution suggested by the bridge designer has therefore undergone many different loading tests, tests in the wind channel, crash tests and computer simulations before it was accepted.
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