Optimum design of long-span suspension bridges considering aeroelastic and kinematic constraints |
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Authors: | F Nieto S Hernández J Á Jurado |
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Affiliation: | 1.School of Civil Engineering,University of La Corunna,Corunna,Spain |
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Abstract: | Cable supported bridges are wind prone structures. Therefore, their aerodynamic behaviour must be studied in depth in order
to guarantee their safe performance. In the last decades important achievements have been reached in the study of bridges
under wind-induced actions. On the other hand, non-conventional design techniques such as sensitivity analysis or optimum
design have not been applied although they have proved their feasibility in the automobile or aeronautic industries. The aim
of this research work is to demonstrate how non-conventional design techniques can help designers when dealing with long span
bridges considering their aeroelastic behaviour. In that respect, the comprehensive analytical optimum design problem formulation
is presented. In the application example the optimum design of the challenging Messina Strait Bridge is carried out. The chosen
initial design has been the year 2002 design proposal. Up to a 33% deck material saving has been obtained after finishing
the optimization process. |
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Keywords: | Sensitivity analysis Optimum design Flutter speed Long span bridges Parallel computing |
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