船舶撞击内河桥梁下部结构力学特性研究  

Study on mechanical characteristics of ship impact on bridge substructure in inland river

作　　者：宋成志 胡裕成 张萌[1] 李文斌 师晖军 张乔 李超 卞海丁 SONG Chengzhi;HU Yucheng;ZHANG Meng;LI Wenbin;SHI Huijun;ZHANG Qiao;LI Chao;BIAN Haiding(Shaanxi Provincial Highway Bureau,Xi’an Shaanxi 710068,China;Ankang City Higway Bureau,Ankang Shaanxi 725099,China;The Engineering Design Academy of Chang’an University Co.,Ltd.,Xi’an Shaanxi 710064,China;School of Highway,Chang’an University,Xi’an Shaanxi 710064,China)

机构地区：[1]陕西省公路局,陕西西安710068 [2]安康市公路局,陕西安康725099 [3]西安长安大学工程设计研究院有限公司,陕西西安710064 [4]长安大学公路学院,陕西西安710064

出　　处：《中国安全生产科学技术》2024年第9期156-164,共9页Journal of Safety Science and Technology

基　　金：陕西省交通运输厅科研项目(22-24K)。

摘　　要：为研究内河桥梁下部结构在船舶撞击下的受力特性,依托安康市汉江一桥,开展水平冲击荷载作用下的单桩冲击力室内模型试验,在通过室内模型试验结果验证数值模型有效性的基础上,建立汉江一桥下部结构模型,研究分析其受船舶撞击下的船撞力、位移及损伤特性。研究结果表明:船桥碰撞产生的船撞力可分为直接撞击阶段与残余力撞击阶段,船桥碰撞问题的研究可仅采用直接撞击阶段;桥梁下部结构的刚度越大,船桥碰撞的接触时间越短、船撞力峰值越大;船舶撞击桥梁下部结构不同位置的最大位移变形主要出现在各部件的连接处,桩基的中性点主要出现在桩顶附近与桩身下半段;进行桥梁下部结构防撞设计时,应重点关注桥墩与承台连接处,承台与桩基连接处的强度问题。研究结果可为内河桥梁的防撞设计与相应的规范规程提供参考。In order to study the mechanical characteristics of bridge substructure in inland river under ship impact,relying on the Hanjiang first bridge in Ankang,the indoor model test of single pile impact force under horizontal impact load was carried out.Based on the verification of the numerical model validity through indoor model test results,a substructure model of the Hanjiang first bridge was established to study and analyze its ship impact force,displacement,and damage characteristics under ship impact.The results show that the ship impact force generated by ship-bridge collision can be divided into the direct impact stage and residual force impact stage,and the study of ship-bridge collision problems can only use the direct impact stage.The greater the stiffness of the bridge substructure,the shorter the contact time for ship-bridge collision,and the greater the peak value of ship impact force.The maximum displacement deformation at different positions of the bridge substructure under ship impact mainly occurs at the connections of various components,and the neutral point of the pile foundation mainly appears near the pile top and the lower half of pile body.When conducting the anti-collision design of the bridge substructure,the attention should be paid to the strength of the connection between the bridge pier and the cap,as well as the connection between the cap and the pile foundation.The research results can provide a reference for the anti-collision design and corresponding regulations of inland river bridges.

关 键 词：船桥碰撞 内河 桥梁下部结构 模型试验 数值模拟 力学特性 

分 类 号：X951[环境科学与工程—安全科学] U443.2[建筑科学—桥梁与隧道工程]