无塔非对称人行悬索桥静风稳定性研究

基于结构稳定性分析方法,借助大型有限元分析程序ANSYS,以某无塔非对称人行悬索桥为实例,建立了4个有限元计算模型,分别对设置有抗风缆的钢桥面板悬索桥结构、有风缆的混凝土桥面板悬索桥结构和不设置抗风缆的钢桥面板悬索桥结构、混凝土桥面板悬索桥结构进行了静风稳定性研究。研究结果表明,质量较大混凝土桥面板比钢桥面板更有利于结构抗风,设置风缆能有效地限制结构在风荷载作用下的横向位移,提高结构失稳风速,研究还发现,若将抗风缆和混凝土桥面板有效地结合最有利于结构抗风,且效果十分明显。

Research on Aerostatic Stability of Asymmetry Pedestrian Suspension Bridge without Tower

Based on the method of analysis of structures stability,some asymmetry pedestrian suspension bridge without tower was taken as the studying case.Four three-dominion finite-element models were built by using ANSYS for the analysis of aerostatic stability based on four different suspension structures.The aerostatic stability of the steel floorboard hanging bridge structure and the concrete floorboard hanging bridge structure with/without wind resistant cable were investigated respectively.The result indicate that the heavier concrete deck slab is better for wind resistance than the steel one,the wind cable can restrict the lateral displacement under the wind loads and improves the buckling wind velocity effetely.Combination of the concrete deck slab and the windcable is the best way for wind resistance and the merits are very visible.