本文採用人行吊索拱橋作為例題，來證明這種方法的有效性和適用性。從數值模擬結果，作用在橋上的顫振風速的拱上的力的影響進行討論。該結果表明，作用在拱圈的風力將增加整個拱橋的顫振臨界風速。 The long-span arch bridges have been a favorable choice for the design of pedestrian bridges during the past decades in Taiwan. This is because the type of bridges not only can satisfy the transportation needs but also may become the landmark in the local area. In these pedestrian bridges, a single arch is the only choice due to the narrow bridge deck. Since the single arch lacks lateral support and its height increases with the bridge span length, the drag responses in the arch become significant and cannot be negligible. An analytical approach based on flutter and buffeting theory associated with the information measured from section model tests is presented in this thesis. The wind forces action on the arch are incorporated into the derivation of the multi-mode equations for flutter and buffeting analysis. Using this approach, the predicted aerodynamic responses can be obtained and may be helpful for the preliminary design. An arch bridge with a straight bridge girder is used as an example to demonstrate the validity and applicability of this approach. From the numerical results, the effects of the forces acting on the arch on the flutter wind speed of the bridge are discussed. The results show that the addition of wind forces acting on the arch will increase the flutter wind speed of the whole bridge.
