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Prestressed concrete (PSC) constructions are widely used to build civil infrastructures such as nuclear containment vessels, super-span bridges, and mega-height high-rise buildings due to their excellent load and crack-resisting capacities.
In this paper, the results of full aeroelastic model test and flutter analysis (two- and three-dimensional) for a generic super long-span bridge, whose main span is 2.8 km, are described.
Moreover, some alternatives of the deck section were investigated to find an optimized one for a super long span bridge.
To make the super long span bridge projects more feasible from a viewpoint of the wind resistant design, new significant progress in the aeroelastic numerical analysis as well as the detailed measurement of the full-dimensional unsteady aerodynamic forces are essential.
With the high strength-to-weight ratio and other advantages of CFRP materials, it was proven in this study that the use of CFRP stay cables and CFRP bridge decks in super long span cable-stayed bridges is feasible and these types of composite cable-stayed bridges could become an excellent alternative to steel cable-stayed bridges where super long spans are desired.
A case study of stay cables in a super long span cable-stayed bridge is finally performed, demonstrating that only two types of adjustable fluid dampers are required for damping vibration of all stay cables in the bridge.
It was confirmed that slotted box girder was applicable for the super long-span bridge for the reason that it is excellent in economical efficiency and aerodynamic stability.
All of these refinements have significantly helped to understand how a super long-span bridge behaves in aerodynamic and aeroelastic performance.
Recently, the aerodynamic characteristics of grating-installed bridge decks have been focused for future super long-span bridges.
This paper aims to clarify the flutter mechanism for super-long span bridges.
Aerodynamic stability is one of the most important themes in the design of super long-span bridges.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com