Anomaly on the Volgograd bridge
An unusual oscillation height, reaching about a meter, is observed on the Volgograd bridge.
The President has already ordered to understand this, and also ordered to close the bridge until the reasons for such behavior of the structure are discovered.
The length of the bridge is about 7 kilometers and its construction cost about one billion dollars.
The phenomenon is extremely ambiguous and at the moment there is a check for the correctness of the design, construction and operation of the bridge in Volgograd. Experts cannot yet name the specific reason, but believe that the most likely cause is the aerodynamics of the bridge.
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Below you can see what the phenomenon looks like. It is amazing how flexible the construction of metal and reinforced concrete seems. Among the readers there are physicists who can at least roughly explain this phenomenon?
Thanks to the users, it is possible to make an interesting addition from the history - the largest destruction of masta across the Gulf of Tacoma in 1940.
“The crash occurred in 1940 after four months of operation. The main cause of the accident is excessive dynamic torsional vibrations caused by the wind. To study the accident of this bridge, the successful factor was that the exact behavior of the bridge from the beginning of the accident to the moment of the crash was studied in detail with the help of filming, which registered the vibrations and the nature of the destruction.
Hanging bridge (cable-stayed) three-span. The total length is 1662 m, the average span is 854 m, two lateral ones - 335 m each, coastal — 137 m, bridge width 11.9 m. The bridge is suspended on two steel ropes 0 438 mm each. Arrow sag 70.66 m. Steel pylons on concrete bulls. The bridge had a very small stiffness beam - 2.44 m, which was 1/100 of the span, and in this connection was subject to strong fluctuations.
The crash occurred in 1940 after 4 months of operation as a result of dynamic oscillations (aerodynamic) caused by wind. An open suspension of the central span caused sagging of side spans and tilting pylons. Strong vertical and torsional vibrations of the bridge resulted from excessive flexibility of the design and relatively low ability of the bridge to absorb dynamic forces ... " (c) www.allbridges.ru/krushenie-takomskogo-mosta
The President has already ordered to understand this, and also ordered to close the bridge until the reasons for such behavior of the structure are discovered.
The length of the bridge is about 7 kilometers and its construction cost about one billion dollars.
The phenomenon is extremely ambiguous and at the moment there is a check for the correctness of the design, construction and operation of the bridge in Volgograd. Experts cannot yet name the specific reason, but believe that the most likely cause is the aerodynamics of the bridge.
')
Below you can see what the phenomenon looks like. It is amazing how flexible the construction of metal and reinforced concrete seems. Among the readers there are physicists who can at least roughly explain this phenomenon?
Thanks to the users, it is possible to make an interesting addition from the history - the largest destruction of masta across the Gulf of Tacoma in 1940.
“The crash occurred in 1940 after four months of operation. The main cause of the accident is excessive dynamic torsional vibrations caused by the wind. To study the accident of this bridge, the successful factor was that the exact behavior of the bridge from the beginning of the accident to the moment of the crash was studied in detail with the help of filming, which registered the vibrations and the nature of the destruction.
Hanging bridge (cable-stayed) three-span. The total length is 1662 m, the average span is 854 m, two lateral ones - 335 m each, coastal — 137 m, bridge width 11.9 m. The bridge is suspended on two steel ropes 0 438 mm each. Arrow sag 70.66 m. Steel pylons on concrete bulls. The bridge had a very small stiffness beam - 2.44 m, which was 1/100 of the span, and in this connection was subject to strong fluctuations.
The crash occurred in 1940 after 4 months of operation as a result of dynamic oscillations (aerodynamic) caused by wind. An open suspension of the central span caused sagging of side spans and tilting pylons. Strong vertical and torsional vibrations of the bridge resulted from excessive flexibility of the design and relatively low ability of the bridge to absorb dynamic forces ... " (c) www.allbridges.ru/krushenie-takomskogo-mosta
Source: https://habr.com/ru/post/94203/
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