碩士 / 淡江大學 / 土木工程學系 / 90 / The requirements of esthetics and the improvements of bridge construction techniques have made the modern bridges designed and built towards long spans with slender sections. Because these types of bridges are more flexible than the other types, they are more susceptible to wind excitation. The most significant aerodynamic behaviors on bridges are flutter and buffeting. This thesis aims to investigate the effects of turbulence on buffeting response through section model tests.
The research contains the wind tunnel tests and a numerical analysis. Two deck sections, closed box girder and plate girder, were tested in the smooth and turbulent flow fields. The turbulence intensities were ranged from 4.95-19.88%. The buffeting dynamic response was then evaluated by incorporating the aerodynamic coefficients into the analytical model of a cable-stayed bridge. The numerical result was compared to that transformed from the test.
The results indicate that the increase of turbulence intensities will not only increase the buffeting response but also increase the flutter wind speed. Furthermore, the turbulence reduces the vortex-induced response. Although there are some discrepancies between the results measured from the test and those calculated from the numerical analysis, they are still within a reasonable range.
| Identifer | oai:union.ndltd.org:TW/090TKU00015006 |
| Date | January 2002 |
| Creators | Shao-Ming Li, 李紹銘 |
| Contributors | Yuh-Yi Lin, 林堉溢 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 0 |
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