长联大跨桥梁多缝变形协同体系研究  

Research on the Coordination System of Multi-seam Deformation of Long Continuous Large-span Bridges

作　　者：柳晨阳 许三平[1] 饶少臣[1] LIU Chenyang;XU Sanping;RAO Shaochen

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《科技创新与应用》2025年第8期11-16,20,共7页Technology Innovation and Application

基　　金：中国铁建股份有限公司科技研发计划项目(2023-B12)。

摘　　要：随着高速铁路无缝线路技术的广泛应用,其长联大跨桥梁温度作用下梁体纵向伸缩产生钢轨附加力等问题日益突出,且钢轨伸缩调节器协同变形性能差、检测手段较为复杂,成为高速铁路线路的薄弱部位。针对这一特点,该文基于多缝变形协同工作体系,建立一种可有效降低钢轨纵向伸缩力、耗散主梁伸缩位移的梁轨一体化有限元模型。通过与常规铁路桥梁梁轨分析模型对比,验证该体系的可行性,总结线路纵向阻力、支座摩阻系数以及纵向弹簧刚度对协同体系的影响规律,优化长联大跨桥梁的结构形式。With the widespread application of high-speed railway seamless track technology,problems such as the additional rail force caused by the longitudinal expansion of the beam body under the action of temperature of the long continuous large-span bridge have become increasingly prominent.In addition,the rail expansion adjuster has poor cooperative deformation performance and complex detection methods,which has become a weak part of the high-speed railway line.Aiming at this characteristic,based on the multi-seam deformation collaborative working system,this paper establishes an integrated finite element model of beam and rail that can effectively reduce the longitudinal expansion force of rail and dissipate the expansion displacement of main beams.Compared with the beam and track analysis model of conventional railway bridges,the feasibility of the system is verified,the influence laws of the longitudinal resistance of the line,bearing friction coefficient and longitudinal spring stiffness on the collaborative system are summarized,and the structural form of the large-span bridge is optimized.

关 键 词：多缝变形 伸缩 相互作用 协同体系 大跨桥梁 

分 类 号：U213.93[交通运输工程—道路与铁道工程]