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|標題:||Numerical predictions on the dynamic response of a suspension bridge with a trapezoidal cross-section||作者:||Fang, F.M.
|關鍵字:||suspension bridge;numerical computation;wind tunnel test;section;model;flutter derivatives;flutter derivatives;identification;model;flow||Project:||Journal of the Chinese Institute of Engineers||期刊/報告no：:||Journal of the Chinese Institute of Engineers, Volume 28, Issue 2, Page(s) 281-291.||摘要:||
A numerical method is developed to predict the dynamic behavior of a suspension bridge under wind action in a two dimensional sense. In particular, the behavior of a vibrating deck with a trapezoidal cross-section is examined. The simulations contain two parts of computations, which are performed alternatively during the calculation process. The solutions of the instantaneous flow field and the deck motions are considered the basis to analyze the problem of deck instability. Wind tunnel measurements are conducted in parallel to measure the response of a sectional bridge model. The vertical and torsional deflections of the model are measured under various wind speeds with several selected attack angles. The results are used to confirm the accuracy of the numerical predictions. Results show that the numerical predictions of the structural response agree well with those from the experiments, indicating that the proposed method is capable of predicting the deck motion with good accuracy. Based on the time-series numerical results, finally, the interactive behavior of the vibrating trapezoidal deck is examined extensively.
|Appears in Collections:||土木工程學系所|
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