吴淞江大桥桥墩抗船撞能力评估研究

针对吴淞江大桥主桥P1#、P2#桥墩用Midas软件建模，分别计算了桥墩在受到1000kN横桥向、顺桥向水平撞击力时在桥墩最危险截面处产生的内力。根据桥墩的实际配筋，按照《公路钢筋混凝土及预应力混凝土桥涵设计规范》，计算桥墩实际能够承受的水平撞击力。横桥向水平抗力由P1#桥墩桩基强度控制，为8890kN；顺桥向水平抗力由P2#桥墩强度控制，为7944kN。应用有限元软件ANSYS／LS—DYNA建模分析在高水位时1000t级船舶正撞、侧桥向45°撞击桥墩产生的最大撞击力。根据计算结果评估桥墩的抗船撞能力。

The Assessment of the Resistance to Ship Impact Capability of Wu Songjiang Bridge Piers

In this paper, according to the shape of the main pier of the bridge Wu Songjiang with the Midas software modeling, calculating the internal forces of the most dangerous section while the pier impact by the horizontal force of 1 000 kN cross to the bridge and along to the bridge. According to the actual reinforcement of bridge pier and the design code of the reinforced concrete highway bridge and the prestressed concrete bridge, calculate the actually capable of withstanding the impact force of the bridge pier. Resistance force of pier impact by transverse to the bridge is 8 890 kN controlled by pile of P1#pier, along to the bridge is 7 944 kN controlled by P2#pier. Application of finite element software ANSYS/LS - DYNA modeling to calculate the maximum impact force of pier impact and side of the bridge to the 45° impact by 1 000 t ship in high water level. According to the calculation results assess the ability of the re- sistance to ship impact.