乐城大桥船撞设防标准与防护方案研究

Research on Ship Collision Prevention Standards and Protection Schemes for Lecheng Bridge

为确定博鳌乐城先行区乐城大桥桥梁的船撞设防标准以及解决桥梁的船撞安全隐患,采用有限元软件建模计算了桥墩自身抗撞能力,通过概率风险法分析得到了桥梁的船撞设防代表船型和设防船撞力。基于自身抗力和设防船撞力对比结果,提出了柔性防撞护板的桥墩防护方案,并采用Ls-Dyna动力仿真软件对其防护效果进行了验证。结果表明:乐城大桥主墩的设防代表船型为150座客船,桥墩抗撞性能均满足要求;提出的柔性防撞护板方案能够避免船舶局部剐蹭桥墩,有效保护船舶乘客的生命安全。

In order to determine the ship collision fortification standard of Lecheng Bridge in Xianxing area of Boao Lecheng and solve the potential safety hazard of ship collision of the bridge,the collision resistance ability of the pier itself is calculated by finite element software modeling,and the representative ship type and the collision force of the bridge are obtained by probabilistic risk analysis.Based on the comparison results of self-resistance and the impact force of fortified vessels,a pier protection scheme of flexible anti-collision shield was proposed,and the protection effect of Ls-Dyna dynamic simulation software was verified.The results show that the representative ship type of the main pier of Lecheng Bridge is 150 passenger ships,and the collision resistance of piers meets the requirements..The proposed flexible anti-collision protection board scheme can avoid local scratches on bridge piers by ships,and effectively protect the safety of ship passengers.