碩士 / 淡江大學 / 土木工程學系碩士班 / 95 / This main objective of this thesis is to investigate and compare flutter
wind speeds and buffeting responses of the prototype bridge with different
types of deck sections. There are four series of bridge decks including
rectangular sections, rectangular sections with triangular edge-fairings, box
sections and plate girder sections. In each series several section models with
different width-depth ratios are studied. Only the tests of the series of
rectangular sections are conducted in this thesis. The other three types are
adopted from other researchers’ work. The static wind force coefficients and
the flutter derivatives are measured in the tests and then substituted into the
numerical model to evaluate the flutter wind speed and buffeting response of
the prototype bridge.
The comparison of the flutter wind speeds obtained from the tests
indicates that for a given width-depth ratio, the rectangular section with
triangular edge-fairings is the best, rectangular section the second, box section
the third, and plate girder section the worst. The flutter wind speed obtained
from a numerical analysis based on flutter derivatives agrees well with that
measured from the test. The results from the tests in turbulent flows indicate
that the flutter wind speed increases with turbulence intensity. The results
reveals that the modification of the bridge deck section significantly affect the
aerodynamic stability of bridges.
| Identifer | oai:union.ndltd.org:TW/095TKU05015029 |
| Date | January 2007 |
| Creators | Wei-Tang Chao, 趙偉棠 |
| Contributors | 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 | 165 |
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