不同风向角下斜拉桥拉索模型测压试验研究

研究风雨共同作用时拉索的气动力特性对建立拉索风雨激振理论模型是非常重要的。设计、制作了用于测压试验的拉索模型,以及可方便调节风向角的试验装置,并在风洞中进行了拉索模型的同步测压试验。试验得到了典型倾角的拉索模型在不同风向角时的平均和脉动风压系数和气动力系数。这些结果为建立精细的理论模型提供了基础。

Testing Study on Wind Pressures on a Stayed Cable Model under Different Wind Angles

It is very important to study the aerodynamic forces on a cable for investigating the mechanism of rain-wind induced cable vibration of cable-stayed bridges. A sectional cable model is established and a new test set-up in which the cable model can be easily adjusted to required cable inclined angles and wind angles is designed and manufactured. The mean and fluctuating wind pressures as well as the lift and drag coefficients on the cable model under the conditions of typical cable inclined angles and wind angles are then obtained from the test. These results might provide a base for establishing precise mechanical models describing rain-wind induced vibration of stayed cables.