台风环境下跨海长桥风场的空间分布特性研究

台风环境下的跨海长桥所处风场分布特性十分复杂,为提高台风期海中长桥桥面行车安全和运营管理服务水平,进行台风环境下大区域风场空间分布特性的研究是十分必要的。根据杭州湾跨海大桥桥位地区在台风"梅花"过境时的风速数据,对该桥线位风场空间分布特性进行了研究,发现该开阔平坦地区的风速变化趋势具有非常高的一致性,大风经过其路线上前后相距较远两点的时间长短会受到地形的影响,并可以采用统一的地面粗糙度通过指数率公式来描述该地区风速的竖向变化规律。

Study on Wind Field Spatial Distribution Characteristics during the Typhoon Period for a Long Sea-crossing Bridge

A long sea-crossing bridge faces a very complicated wind field during the typhoon period with the distribution characteristics.In order to improve the traffic safety and enhance the operation service level of the long sea-crossing bridge in the typhoon,it is necessary to study the wind field of a wide area in the typhoon.A relevant data have been collected along the Hangzhou Bay Bridge while the typhoon " Meihua" passing by.It was shown that the changing process of the wind velocities of different points over an open plain are very consistent,the topography has an influence on the wind moving from one place to another distant along the wind path.It can be dircribed the vertical wind velocity distribution with a unified ground harshness index.