中文摘要：

为了描述苏通大桥桥址区风速风向联合分布规律,为大跨度桥梁结构的风振分析精细化研究奠定基础,基于苏通大桥结构健康监测系统开展了桥址区风速风向联合分布研究.根据该系统风速仪在主梁跨中上游、跨中下游、北塔塔顶、南塔塔顶4个关键部位记录的风特性数据,采用数理统计方法,推算了4个部位10年、100年重现期的极值风速.结果表明,苏通大桥风特性监测数据合理可靠、桥址区极值风速分布概型接近Weibull分布,考虑风向影响的极值风速总体上比不考虑风向影响时的结果要小.

英文摘要：

To describe the joint distribution law of wind speed and direction in the area of Sutong Bridge site and to lay a foundation for the refinement research on the wind-induced vibration analysis of long span bridges,the study of the joint distribution of wind speed and direction in the area of the bridge site was conducted based on the structural health monitoring system （SHMS） of the bridge.In terms of the wind characteristic data recorded by the anemometers of the SHMS installed at the 4 critical locations on the upstream and downstream sides of the midspan of the main span and at the north and south pylon tops,the extreme wind speeds in the 10-year and 100-year recurrence intervals at these locations were calculated by the mathematical statistic method.The results of the calculation verify that the recorded wind characteristic data from the SHMS are rational and reliable,the extreme wind speed distribution probability model for the area of the bridge site approximates the Weibull Distribution and in general,the result of the extreme wind speed considering the wind direction influence is less than that not considering the influence.