By J. A. Jurado, S. Hernández, A. Mosquera, Félix Nieto
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Extra resources for Bridge Aeroelasticity: Sensitivity Analysis and Optimum Design
The length of the two together is 3170 m, surpassing the 2824 m span of the Bay Bridge between San Francisco and Oakland in the USA. 04 m, breaking world records in 1988, when they were built. As for cable-stayed bridges along this central route, there are the Hitsuishijima and Iwakurojima bridges. 13: twin bridges each with a central span of 420 m, but reaching a length of 1580 m in total. Structures entirely made of steel, they have a truss section very much in line with the others preceding them to hold the train line mentioned earlier.
At the beginning of the 1960s, great suspension bridges were ﬁrst being built in Europe. One example is the Firth of Forth Bridge in Scotland. It was opened to trafﬁc in 1964 and spanned 1006 m between its towers. Another is the 25 de Abril Bridge in Lisbon, inaugurated in 1966. Its central span is 1014 m. 12 demonstrate how both have lengths that could be considered normal and trustworthy designs, relying on deck truss sections of great rigidity. The record for main span length held by the Golden Gate since 1937 would not be challenged until 1964, when the Verrazano Strait Bridge was opened in New York.
This advanced approach produced ﬂutter speed results similar to those described in Larsen. Moreover, through this approach, it was possible to know the role played by each vibration mode in the bridge’s collapse. With these results Hernández used a very lifelike digital model of the Tacoma Narrows Bridge to achieve a three-dimensional visualization of its dynamic and aeroelastic behaviour. This enabled him to create a virtual reproduction of the process leading to the bridge’s ﬂutter-induced instability.