株洲湘江一桥桥墩抗船撞能力评估及防撞方案研究

发布时间：2018-03-24 02:19

本文选题：桥墩　切入点：最危险截面　出处：《桥梁建设》2014年02期

【摘要】：船桥碰撞事故常有发生,为评估已建桥梁桥墩的抗船撞性能、指导防撞方案设计,以株洲湘江一桥通航孔8~10号桥墩为对象,建立有限元模型计算了桥墩在受到单位水平撞击力时最危险截面处产生的内力,进而根据相关规范,计算桥墩截面实际能够承受的水平撞击力;建模分析2 000吨级船舶在各工况下撞击桥墩时实际产生的最大船撞力;根据两者计算结果差值评估桥墩的抗船撞能力,提出设置复合材料防撞系统方案并进行比较研究。结果表明:该桥桥墩的横桥向抗撞能力由9号墩强度控制,为11.03 MN;船舶最不利工况撞击桥墩时产生的撞击力为13.55MN,超出桥墩极限抗撞能力;设置复合材料防撞系统后桥墩受到的水平撞击力可明显小于桥墩的水平抗力,从而保证桥墩结构的安全。
[Abstract]:Ship bridge collision accidents often happen, for anti collision performance evaluation of built bridge pier design, anti-collision program guidance, in Zhuzhou Xiangjiang bridge navigable 8~10 pier pier as the object, by unit level impact force when the most dangerous section of the internal force calculation of the finite element model is established, and in accordance with the relevant specification. The actual calculation of pier can withstand horizontal impact force; modeling analysis of maximum ship 2000 ton ship in all conditions when the pier collision impact force calculation; anti ship ability difference evaluation according to the results of pier two, setting the composite anti-collision system scheme and a comparative study. The results show that the cross bridge of the bridge the pier to pier 9 by impact resistance strength control, 11.03 MN; the impact force generated the most unfavorable conditions impact the pier when the 13.55MN, beyond the limit pier anti-collision ability; composite set After the collision avoidance system, the horizontal impact force of the pier can be obviously smaller than the horizontal resistance of the pier, thus ensuring the safety of the pier structure.

【作者单位】：南京工业大学土木工程学院;中铁大桥勘测设计院集团有限公司;
【基金】：国家自然科学基金重点项目(51238003) 江苏省高校自然科学研究重大项目(12KJA580002)~~
【分类号】：U443.22

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