防船撞装置对桥梁下部结构波浪荷载的影响研究

Research on the Influence of Anti-collision Device on Wave Load of Bridge Substructure

以跨海航道桥梁安全为背景,研究防船撞装置对桥梁下部结构波浪荷载的影响。首先总结了目前工程中常用的桥梁下部结构波浪荷载计算方法,包括理论计算、模型试验和数值模拟,然后以岱山县鱼山大桥工程为背景,利用FLUENT软件对其主桥过渡墩及引桥独柱墩进行水动力计算,得到施加有防船撞装置后结构波浪荷载的变化。研究结果表明,对于复杂工程结构物,通常采用模型试验与数值模拟相结合的方法来确定波浪荷载;施加有固定式防船撞装置后,鱼山大桥下部结构所受波浪荷载均增大,但墩柱结构截面承载能力仍满足设计要求。

Based on the safety of sea-across channel bridge, the influence of anti-collision device on the wave load of bridge substructure is studied. The calculation methods of wave load on bridge substructure commonly used in engineering are summarized, including theoretical calculation, model test and numerical simulation. Taking the Yushan Bridge project in Daishan County as the background, the hydrodynamic calculation of the transition pier of the main bridge and the single column pier of the approach bridge is carried out by the FLUENT software, and the change of the structural wave load brought by the anti-collision device is obtained.The results show that: for complex engineering structures, the method of combining model test with numerical simulation is usually used to determine the wave load. After the fixed anti-collision device is applied, the wave load on the substructure of Yushan Bridge increases, but the bearing capacity of the pier structure section still meets the design requirements.