CAJ | 학술논문

基于全物理坐标法的ANSYS有限元模型，对中渡桥施工阶段颤振稳定性进行分析，分别研究对称与不对称施工、不同初始风攻角、结构阻尼等因素对施工阶段颤振稳定性的影响。研究结果表明：不对称施工顺序更有利于施工阶段的颤振稳定性；初始风攻角为-3°时有利于颤振稳定性，而＋3°时最为不利；结构阻尼对颤振稳定性影响较大，特别是早期施工阶段尤为显著，可明显改善大跨度悬索桥施工阶段颤振稳定性。分析方法可为桥梁设计和研究人员提供参考。
기우전물리좌표법적ANSYS유한원모형，대중도교시공계단전진은정성진행분석，분별연구대칭여불대칭시공、불동초시풍공각、결구조니등인소대시공계단전진은정성적영향。연구결과표명：불대칭시공순서경유리우시공계단적전진은정성；초시풍공각위-3°시유리우전진은정성，이＋3°시최위불리；결구조니대전진은정성영향교대，특별시조기시공계단우위현저，가명현개선대과도현색교시공계단전진은정성。분석방법가위교량설계화연구인원제공삼고。
The characteristics of flutter stability during construction are influenced by many factors such as the sequence of deck erection.In this paper,numerical flutter stability analyses were performed for the construction process of the Zhongdu Bridge over Yangtze River with ANSYS FE model based on physical coordinates method. Therein,the effect of structural damping,the initial wind attack angle,and the sequence of deck erection were discussed in detail.It is found that the non-symmetrical sequence deck erection is aerodynamically favourable for the deck erection for long-span suspension bridges.As for the initial wind attack angle,it is beneficial to flutter stability with -3°,while unfavorable with +3°.Meanwhile,structural damping has a great impact on flutter stability,particularly obvious during the early construction stage.This analysis method with ANSYS could afford reference to bridge designers.