Generalized framework for identification of indicial response functions from flutter derivatives of long-span bridges

2021 ◽  
Vol 244 ◽  
pp. 112727
Author(s):  
Khawaja Ali ◽  
Hiroshi Katsuchi ◽  
Hitoshi Yamada
Keyword(s):  
Response Functions ◽  
Long Span Bridges ◽  
Long Span ◽  
Generalized Framework ◽  
Derivatives Of ◽  
Flutter Derivatives

Effect of Turbulence on the Aerodynamic Stability of Long Span Bridges

2013 ◽  
Vol 639-640 ◽  
pp. 452-455 ◽  
Author(s):  
Chun Guang Li ◽  
Zheng Qing Chen ◽  
Zhi Tian Zhang
Keyword(s):  
Wind Tunnel Test ◽  
Grid Turbulence ◽  
Aerodynamic Stability ◽  
Rectangular Section ◽  
Long Span Bridges ◽  
Long Span ◽  
Turbulence Flow ◽  
Turbulence Effect ◽  
Suspended Bridge ◽  
Derivatives Of

The study deals with the problem of turbulence effect on the instability of a long span suspended bridge. Wind tunnel test of three representative section models have been carried out in four type of passive grid turbulence flow to clarify the effect of turbulence intensity and turbulence scales. It was found that the turbulence has little effect on the derivatives of those streamlined deck sections, while it exhibits significant stabilizing effect on the bluff rectangular section prism. The loss of spanwise correlation may not be the main reasons induce the change of flutter stability in turbulence.

scholarly journals Suppression of Bridge Flutter Using Suction Control

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Shibo Tao
Keyword(s):  
Wind Speed ◽  
Leeward Side ◽  
Suction Velocity ◽  
Long Span Bridges ◽  
Wind Speeds ◽  
Long Span ◽  
Suction Control ◽  
Long Span Bridge ◽  
Section Model ◽  
Derivatives Of

To verify the effectiveness of the suction-based method for improving flutter stability of long-span bridges, the forced vibration experiments for extracting the flutter derivatives of a section model with and without suction were performed, and the corresponding critical flutter wind speeds of this structure were calculated out. It is shown by the experiment that the flutter stability of the bridge depends on suction configuration. As the suction holes locate at the leeward side of the model, the critical flutter wind speed can attain maximum under the same suction velocity. In the analytical results, it is remarkably effective that the suction control improves the long-span bridge flutter stability.

Alternate Designs for Long Span Bridges

PCI Journal ◽  
1980 ◽  
Vol 25 (4) ◽  
pp. 48-58
Author(s):  
Felix Kulka
Keyword(s):  
Long Span Bridges ◽  
Long Span
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