大跨连续刚构桥上CRTSⅡ型板式轨道纵向力分析  

Analysis of Longitudinal Force in CRTS Ⅱ-slab-track in Long-span Continuous Rigid Frame Bridge

作　　者：徐锡江[1] 魏建兵 

机构地区：[1]中铁二院工程集团有限责任公司土木建筑设计研究一院,成都610031 [2]广州铁路(集团)公司,广州510000

出　　处：《高速铁路技术》2012年第4期52-56,共5页High Speed Railway Technology

摘　　要：针对大跨连续刚构桥上CRTSⅡ型板式轨道,建立了桥上纵向力计算模型,计算了制挠力和温度力下的桥上纵向附加力,分析了滑动层摩擦系数取值、固结(限位)机构设置与其对桥上轨道附加纵向力的影响。计算结果表明:大跨连续刚构桥上CRTSⅡ型板式轨道以温度力为主要控制荷载;底座板在与台后端刺(锚固结构)刚性连接的部位极易发生断板,建议锚固结构与底座板采用弹性连接的形式,以降低底座板和锚固结构的受力,减小滑动层对轨道结构的摩擦系数以及在大跨连续刚构桥上设置限位机构。Based on CRTS Ⅱ -slab-track on long-span continuous rigid frame bridge, this article establishes the calculation model of longitudinal force to calculate additional longitudinal forces controlled by braking-bending forces and temperature stress in bridge, analyses dereferencing on sliding friction coefficient and the setting of concretion （spacing） mechanism as well as its influence on track additional longitudinal forces. The calculating results show that the major controlling load of CRTS Ⅱ -slab-track on long-span continuous rigid frame bridge come from temperature stress. The rigid connections part of bed plate and terminal spine （anchoring） will be easily broken, so the paper suggests that bed plate and terminal spine use flexible connections to reduce the loading on bed plate and anchoring. It is also necessary to decrease the friction coefficient on track structure exerted by sliding and set spacing mechanism on long-span continuous rigid frame bridges.

关 键 词：大跨连续刚构桥 CRTS Ⅱ型板式轨道 制挠力 温度力 

分 类 号：U213.242[交通运输工程—道路与铁道工程]