桥梁防船撞抗撞性能评估及受力分析研究

Research on Evaluation and Force Analysis of Anti-collision Performance of Bridges against Ship Collisions

摘要:

某高速公路桥跨越苏南运河，为满足苏南运河由三级航道升级为二级航道的通航要求，需对跨河桥梁进行防船撞抗撞性能评估。以2 000吨级船舶作为设防代表船型，分析了船舶撞击力的影响因素和计算方法；采用强迫振动法建立了全桥空间有限元模型进行受力分析。主要验算了桥梁墩柱和桩基的抗弯承载能力和抗剪承载能力，结果表明该桥墩柱和桩基受力满足规范要求，桥墩抗撞性能满足通航代表船型（2 000吨级船舶）的防撞要求，可为类似桥梁防撞设计提供重要参考。

Abstract:

An expressway bridge crosses the South Jiangsu Canal. To meet the navigation requirements for the upgrade of the canal from a Class III to a Class II waterway, it is necessary to conduct an assessment of the anti-collision performance of the bridge. Taking a 2000-ton vessel as the design representative ship type, the influencing factors and calculation methods of ship collision forces are analyzed. A spatial finite element model of the entire bridge is established using the forced vibration method for stress analysis. The flexural and shear bearing capacities of the bridge piers and pile foundations are mainly checked. The results indicate that the stresses on the piers and pile foundations meet the code requirements, and the anti-collision performance of the piers satisfies the anti-collision requirements of representative navigation vessel types (2,000-ton class ships), which can provide an important reference for the anti-collision design of similar bridges.