双侧靠泊油码头靠船墩结构的设计优化

Design optimization on breasting dolphin structures of double-side berthing oil terminal

针对双侧靠泊平面布置形式的离岸式油码头的靠船墩设计,通过有限元计算软件建立分析模型,对3个不同设计方案的靠船墩结构受力进行分析,得到每个方案的桩顶轴力、弯矩和墩台位移等计算结果,并对其进行对比。结果表明:船舶撞击力为靠船墩设计的控制性荷载,双侧泊位的船舶撞击力一般不同时发生且作用方向相反,共用靠船墩的设计方案能部分分担甚至抵消一侧船舶撞击力,从而显著改善结构受力,减小桩基内力和墩台位移,并节约建设成本。

For the design of breasting dolphins for an offshore oil terminal with a double-side berthing layout,calculation models are established by using finite element analysis software for the structural analysis of three different design schemes of breasting dolphins.The axial forces and bending moments on top of piles,and the displacement of dolphins are obtained and compared.The results show that the ship berthing loads are critical for the design of breasting dolphin,as the berthing loads of the two berths are normally not occurred at the same time and act in opposite directions,a combined breasting dolphin for the two berths can partially share or even offset the ship berthing loads from one side berth,which therefore can significantly improve the structural stress,reduce the pile internal forces and dolphin displacement,and ultimately save costs.