长洲水利枢纽三线四线船闸交通桥工程抗撞性能分析

    Anti-collision analysis of traffic bridge engineering of three-line and four-line lock at Changzhou Hydro-Junction Project

    • 摘要: 在船闸与枢纽交通桥混合区域,存在过闸船舶与交通桥碰撞风险。对此,结合《船舶碰撞桥梁隐患治理三年行动实施方案》,采用有限单元法对长洲三线四线船闸交通桥抗撞性能进行验算分析。研究表明:5 000吨级设防代表船型撞击船闸分水墙,箱梁最大位移趋近于零,交通桥各项指标均满足规范的要求,该工况下船闸和交通结构安全受到的影响较小;5 000吨级和3 000吨级设防代表船型正面撞击船闸交通桥,箱梁位移值较大,易造成桥梁损坏,船舶的大型化发展使船闸与枢纽交通桥混合区域的桥梁安全风险增加。相比撞击船闸分水墙工况,船舶撞击船闸交通桥箱梁工况更易造成桥梁损坏,应完善导助航标志标牌,提醒船舶核实自身干舷高度与桥梁净高的符合性,提升进出闸的安全性。

       

      Abstract: In the mixed area of ship lock and hub traffic bridge,there is collision risk between the ships passing through the lock and the traffic bridge project. Under the situation of the hidden danger of ship collision bridge control for three years,this paper adopts the finite element method to analyze the anti-collision performance of the traffic bridge of Changzhou three-line and four-line ship lock. The study shows that after 5 000 t ship crashing the sluice wall of the lock,the maximum displacement of the box girder is close to zero,and all the indexes of the traffic bridge meet the requirements of the code. This condition has little influence on the safety of lock and traffic structure. When 5 000 t and 3 000 t ship crash the bridge directly,the displacement of the box girder is large,which is easy to cause bridge damage.The development of large-scale ships increases the crashing risk in the mixed area of lock and traffic bridge. Compared with the condition of crashing the sluice wall of the lock,the ship crashing the box girder of the traffic bridge is more likely to cause damage to the bridge. Guidance and navigation aid signs should be improved to remind the ship to verify the compliance between the freeboard height of its own ship and the clear height of the bridge,so as to improve the safety of entering and leaving the lock.

       

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