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Aerodynamic stability of long-span box girder bridges and anti-vibration design consideration
As structures tend to be large-sized these days, box girder bridges are steadily getting to be long-spanned, the maximum span length of some box girder bridges being beyond 250 m nowadays (Higaki et al. 1989). These long-span box girder bridges differ from the bridges suspended by cables such as cable-suspension bridges and cable-stayed bridges in that the box girder bridges support all their loads with only their girders. Thus, the depth of girder becomes more in order to achieve rigidity, which leads to a blunt girder cross-section. Therefore, the aerodynamic stability of box girder bridges is often inferior to that of cable-suspension bridges and cable-stayed bridges. Moreover, a large-scale countermeasure against the vibration is required to improve the aerodynamic stability, so a careful investigation for the aerodynamic stability is necessary at the stage of preliminary design. This paper attempts to systematize a series of wind tunnel tests on the general aerodynamic characteristics and the countermeasures against the vibration for long-span box girder bridges, and describes the comparison between test results and field measurements. Furthermore, the points which require special attention in the design of such bridges and in the countermeasures against the vibration are mentioned.
Aerodynamic stability of long-span box girder bridges and anti-vibration design consideration
As structures tend to be large-sized these days, box girder bridges are steadily getting to be long-spanned, the maximum span length of some box girder bridges being beyond 250 m nowadays (Higaki et al. 1989). These long-span box girder bridges differ from the bridges suspended by cables such as cable-suspension bridges and cable-stayed bridges in that the box girder bridges support all their loads with only their girders. Thus, the depth of girder becomes more in order to achieve rigidity, which leads to a blunt girder cross-section. Therefore, the aerodynamic stability of box girder bridges is often inferior to that of cable-suspension bridges and cable-stayed bridges. Moreover, a large-scale countermeasure against the vibration is required to improve the aerodynamic stability, so a careful investigation for the aerodynamic stability is necessary at the stage of preliminary design. This paper attempts to systematize a series of wind tunnel tests on the general aerodynamic characteristics and the countermeasures against the vibration for long-span box girder bridges, and describes the comparison between test results and field measurements. Furthermore, the points which require special attention in the design of such bridges and in the countermeasures against the vibration are mentioned.
Aerodynamic stability of long-span box girder bridges and anti-vibration design consideration
Die aerodynamische Stabilität von Kastenträgerbrücken großer Spannweite und Betrachtungen zur Anti-Schwingungs-Auslegung
Saito, T. (author) / Sakata, H. (author)
Journal of Fluids and Structures ; 13 ; 999-1016
1999
18 Seiten, 23 Bilder, 2 Tabellen, 15 Quellen
Article (Journal)
English
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