摘要
基于模拟的随机脉动风速场,以主跨800 m的大连港航道桥为背景,详细分析几何非线性、侧向气弹效应、缆索上的脉动风、气动导纳等因素对自锚式斜拉-悬吊协作体系桥抖振响应的影响,总结该新型体系桥抖振响应的特点。结果中需特别指出,与普通悬索桥不同的是,缆索上的脉动风引起了主缆的振动并与主梁产生耦合振动,且对主梁的扭转位移也产生了显著的影响。
On the basis of the simulated random fluctuating wind field and against the background of the Dalian Harbor Shipping Channel Bridge, a self-anchored cable-stayed suspension bridge with a main span 800 m, this paper analyzes in detail the influence of several factors, such as the geometric nonlinearity, lateral aeroelastic effect, fluctuating wind on cables and aerody namic admittance, on the buffeting response of the type of the bridge and summarizes the charac- teristics of the buffeting response of such new type of the bridge. It is particularly noteworthy in the results of the analysis that differing from a common suspension bridge, the fluctuating wind on cables causes vibration of the main cables, the vibration couples with that of the stiffening girder and will also bring about obvious influence on the torsional displacement of the girder.
出处
《世界桥梁》
北大核心
2009年第4期42-45,共4页
World Bridges
基金
国家自然科学基金项目(50708012)
交通部西部交通建设科技项目(200631882350)
关键词
斜拉-悬吊桥
协作体系
脉动风
抖振
cable-stayed suspension bridge
coordinate system
fluctuating wind
buffeting
