风暴潮条件下越浪水体对堤顶附加直墙的作用

为研究极端条件下浅水大波对沿海建筑物的作用,采用物理模型试验的方法,在波浪水槽中开展风暴潮条件下越浪水体对斜坡堤堤顶附加直墙的作用试验,得出波浪作用在堤顶附加直墙上压强分布的规律,并基于动量方程得出越浪量和压强、流速之间的相互关系。结果表明,不同越浪量条件下直墙作用力随时间呈不同的变化规律,当越浪量较小时呈单峰分布,越浪量较大时呈双峰分布;越浪水体对直墙的水平作用力符合韦布尔分布;越浪水体上挑角度先随越浪量增加而增加,当越浪量较大时再随越浪量增加而略微减小,最大值在75°左右。

Force of additional vertical-wall on seawall by overtopping flow under storm surge condition

In order to study the force of shallow-water wave on coastal buildings under extreme conditions,we apply physical model test to carry out a series of experiments on overtopping discharge and force of vertical-wall attached on sloping seawall in the wave flume,obtain the pressure distribution of the vertical-wall on seawall,and get the relationship between overtopping discharge,pressure and velocity based on the momentum equation.The results show that the impact force on the vertical-wall under different conditions presents different trends.It presents a single-peak evolution shape when the overtopping discharge is little,and it presents a double-peaked evolution shape when the overtopping discharge is large.The horizontal force of the overtopping flow on the vertical-wall is consistent with the Weibull distribution.The uplift angle increases first with the increase of overtopping discharge,and it decreases slightly with the increase of overtopping discharge when overtopping discharge is large.The maximum uplift angle of overtopping is about 75°.