营口辽河公路大桥抗风性能研究  

Research on Wind Resistance Performance of Liaohe River Highway Bridge in Yingkou

作　　者：罗涛[1,2] 

机构地区：[1]长安大学,陕西西安710064 [2]中国公路工程咨询集团有限公司北京华宏公司,北京101113

出　　处：《公路交通科技》2009年第2期103-107,共5页Journal of Highway and Transportation Research and Development

摘　　要：以营口辽河公路大桥为背景,研究斜拉桥在施工阶段及成桥状态的抗风性能。对斜拉桥在基本风速与设计基准风速及颤振检验风速的确定,气动参数计算,弯扭耦合颤振与分离流扭转颤振的颤振稳定性分析,成桥状态、最大单悬臂状态、最大双悬臂状态、桥塔施工状态的风荷载及风载响应4个方面进行研究。按平板近似公式估算,得出该桥桥位处的基本风速、桥面高度处的设计基准风速、成桥状态的颤振检验风速、施工阶段的颤振检验风速。用ANSYS大型结构分析程序进行分析和计算。该斜拉桥方案无论在成桥状态或施工最不利状态均满足颤振稳定性要求。给出了成桥状态、最大单悬臂状态、最大双悬臂状态以及主塔施工状态的桥塔风载内力及主梁风载位移。Taking Liaohe River Highway Bridge in Yingkou as the research object, the wind resistance performance of cable-stayed bridges under construction and at the completion state was analyzed. The wind resistance performance of cable-stayed bridges at basic wind speed, design reference wind speed and critical flutter wind speed were determined .The pneumatic paramete was calculated.The stabilities of coupled bending- torsional flutter and separation torsional flutter were analyzed. The wind load and its response at the states of completion, the maximum single cantilever, the maximum double cantilever and the construction of pylon were discussed. By using the plane approximate formula, the basic wind speed of the bridge site, the design reference wind speed of the bridge deck, the critical flutter wind speed of the bridge at the completion state, and the critical flutter wind speed of the bridge under construction were estimated. With the help of the large-scale structural analyzing program ANSYS, the scheme meets the need of the flutter stability whether at the completion state or under construction. The wind load internal forces of pylon and the wind load displacements of beam at the states of completion, the maximum single cantilever, the maximum double cantilever and the construction of pylon were provided.

关 键 词：桥梁工程 斜拉桥 桥塔风载内力 主梁风载位移 ANSYS程序 抗风性能 

分 类 号：U45[建筑科学—桥梁与隧道工程]