侧向撞击荷载作用下渡槽支承结构安全检测与评价  

Safety Detection and Assessment of Aqueduct Supporting Structure under Lateral Impact Load

作　　者：李军[1,2] 崔德浩[3] 游日 郝洁[1] 潘文明 LI Jun;CUI Dehao;YOU Ri;HAO Jie;PAN Wenming(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China;Hohai University,Nanjing 210024,China;Shenzhen Dongjiang Water Source Engineering Management Office,Shenzhen 518000,China)

机构地区：[1]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029 [2]河海大学,江苏南京210024 [3]深圳市东江水源工程管理处,广东深圳518000

出　　处：《人民珠江》2023年第5期89-96,共8页Pearl River

基　　金：国家重点研发计划资助(2016YFC0401610);中央级公益性科研院所基本科研业务费专项资金资助(Y415012、Y417010)。

摘　　要：针对某渡槽桩柱支承结构受到船舶撞击后出现的结构破坏实例,在收集有关工程资料基础上,开展现场检测和监测分析,并利用有限元方法建立渡槽桩柱结构三维实体分析模型,考虑地基与桩基的耦合及上部结构共同作用,对桩柱碰撞过程进行数值模拟计算分析,研究并验证了支承结构受撞击损伤的分布与特征。有限元数值模拟结果表明船舶碰撞过程中渡槽桩柱的高应力区按照成因可分两类:一类是由直接接触载荷引起的高应力区,发生在撞击船与承台碰撞接触面及附近区域;另一类是由于桩柱整体弯曲变形引起,发生在桩柱与承台连接处危险截面,仿真分析和现场检测结果相吻合。通过评定船舶撞击影响,排查渡槽隐患,该研究成果可为下一步渡槽维修加固和设计提供依据。In view of the structural damage of an aqueduct pile-pillar supporting structure caused by ship collisions,relevant engineering data were collected,and on-site detection and monitoring analysis were carried out.In addition,the finite element method was used to establish a three-dimensional entity analytical model of the aqueduct pile-pillar structure.Under the joint action of the coupled foundation and pile foundation and superstructure,numerical simulation and calculation analysis were carried out on the pile-pillar collision process.The distribution and characteristics of the damage of the supporting structure caused by collisions were studied and verified.The finite element numerical simulation results show that the high-stress area of the aqueduct pile-pillar structure during the ship collision process can be divided into two categories according to the cause.One is the high-stress area caused by the direct contact load,which occurs in the collision contact surface and the adjacent area between the ship in a collision and the bearing platform,and the other is caused by the overall bending deformation of the pile-pillar structure,which occurs in the dangerous section of the pile-pillar structure and the bearing platform connection.In addition,the simulation analysis and on-site detection results are consistent.By assessing the influence of ship collisions and checking the potential safety hazards of the aqueduct,the research results lay a foundation for the maintenance,reinforcement,and design of the aqueduct.

关 键 词：跨河渡槽 支承结构 侧向撞击荷载 安全评价 

分 类 号：TV672.3[水利工程—水利水电工程]