悬挑框架式海堤不规则波浪力特性研究

以浙江温州浅滩二期生态堤为例，在波浪港池中开展物理模型试验，探究悬挑框架式海堤在不规则波作用下的受力特性。测量不同入射波条件下海堤直立墙和悬挑的波压强值并分析其随时间变化特性，得到各工况下海堤结构上波压强的分布特征，并探讨结构受力的主要影响因素，对结构所受波浪总力及其影响因素进行冗余分析(RDA)。结果表明：海堤直立墙在波峰作用下，水平方向不同位置受力存在相位差，且潮位以上、以下部分受力过程差异较大；极端工况下海堤直立墙与悬挑连接处所受压强最大；结构整体所受最大竖向总力为5 653.125 kN，约为最大水平总力的70%；有效波高相较于潮位与结构受力的相关性更大。在悬挑框架式海堤设计中，应保证直立墙与悬挑连接处的强度，充分考虑波浪竖向荷载以及最大波高出现情况对整体稳定的影响。

Irregular wave force characteristics of cantilever framed seawall

Taking the second phase ecological seawall of Wenzhou in Zhejiang Province as an example,we conduct physical model tests in a wave harbor pool to explore the mechanical characteristics of a cantilever framed seawall under irregular wave action.We measure the wave pressure values of the vertical wall and cantilever of the seawall under different incident wave conditions,and analyze their time-varying characteristics.Then we obtain the distribution characteristics of wave pressure on the seawall structure under various working conditions,explore the main influencing factors of structural stress,and carry out a redundancy analysis (RDA) on the total wave force and its influencing factors on the structure.The results show that under the action of wave peaks,there is a phase difference in the force acting on the vertical wall of the seawall at different positions in the horizontal direction,and there is a significant difference in the force process above and below the tide level.Under extreme working conditions,the connection between the vertical wall of the seawall and the cantilever is subjected to the maximum pressure.The maximum vertical total force on the entire structure is 5 653.125 kN,which is approximately 70% of the maximum horizontal total force.The correlation between significant wave height and structural stress is greater compared to tide level.In the design of cantilever framed seawalls,it is necessary to ensure the strength of the connection between the vertical wall and the cantilever,and fully consider the impact of vertical wave loads and the occurrence of maximum wave height on overall stability.