摘要
针对桥梁上部结构被撞的问题,提出一种带拉杆的防船撞限高装置。采用动力数值仿真方法,考虑不同撞击工况,分析各构件(横梁、立柱和拉杆)刚度对撞击效应及限高装置耗能能力的影响,研究装置各构件刚度分配。研究表明:1)横梁刚度是限高装置防护性能最敏感的指标,其刚度越大,撞击力、回弹力越大,跨中位移和装置内能越小;2)立柱和拉杆刚度与跨中位移和装置整体吸能呈反相关关系,与驾驶舱撞击力相关性较小;3)基于能量比-刚度比曲线,提出防撞装置各构件最优刚度比区间和构件刚度的设计思路,可供类似装置设计参考。
A height limiting device with damping bar for ship collision prevention is proposed to address the issue of collision on the upper structure of bridges.The dynamic numerical simulation method was used to analyze the influence of the stiffness of each component(beam,column and damping bar)on the impact effect and the energy dissipation capacity of the height limiting device considering different impact conditions.The research shows that:1)The stiffness of the crossbeam is the most sensitive indicator of the protective performance of the device,the impact force and rebound force increase while the displacement and internal energy decrease with the crossbeam stiffness increases;2)The stiffness of columns and tie rods is inversely correlated with displacement and energy absorption of the device,but has no effect on the impact force;3)Based on the energy ratio-stiffness ratio curve,the optimal stiffness ratio range and the design method for the device are proposed,which can provide reference for the design of similar devices.
作者
邓雅思
耿波
李嵩林
熊露瑶
DENG Yasi;GENG Bo;LI Songlin;XIONG Luyao(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;College of Civil Engineering,Southeast University,Nanjing 210096;Anhui Urban Construction Design Institute Corp.,Ltd.,Hefe,230041)
出处
《公路交通技术》
2024年第6期42-50,共9页
Technology of Highway and Transport
基金
国家重点研发计划项目(2023YFB2604400)
重庆市自然科学基金项目(CSTB2022NSCQ-MSX1658)。
关键词
桥梁上部结构
防船撞装置
刚度分配
动力数值仿真
bridge superstructure
anti-ship collision device
stiffness distribution
dynamic numerical simulation
