摘要
槽型连续梁的优点是能够最大限度地降低线路纵断面,节约投资。国内槽型梁应用较晚,在建的济青高铁(40+70+70+40)m槽型连续梁将成为国内外跨度最大的高速铁路双线预应力混凝土槽型连续梁。为推进连续槽型梁在铁路桥梁中的应用,为类似的桥梁设计提供参考,本文充分研究了桥面布置、温度荷载、横向计算边界条件、车桥耦合动力分析等槽型梁关键设计参数。研究结果表明:(1)采用把人行道放在边箱顶的截面布置。(2)提出了运营阶段的温度荷载加载模式。(3)研究了跨中横框六片腹板下弹性支撑刚度。(4)确定了支反力在支点横梁六片腹板处的分配比例。(5)列车运行安全性和平稳性满足规范要求。
The continuous trough girder has advantages in maximally lowering the line profile and saving investment. After completion, the （40 ＋70 ＋70 ＋ 4 0 ） m continuous trough girder of Ji-Qing high-speed railway will be a double track prestressed concrete continuous trough girder with the longest span at home and abroad. For promoting the application of continuous trough girder in railway bridges, key design parameters such as the layout of bridge deck, temperature load, lateral boundary condition, vehicle-bridge coupling dynamic analysis are fully studied, which can provide reference for similar bridge designs. Research conclusions ： （1） Placing the sidewalk slab on the top of the side box. （2） The loading mode of temperature under operation stage is put forward. （3） The elastic support stiffness at the six web plates of the mid-span frame is researched. （4） The distribution ratio of the supporting force at the six web plates of the cross beam is determined. （5 ） The results of the bridge meet the requirements of traffic safety and stability.
作者
吴大宏
WU Dahong(China Railway Design Corporation,Tianjin 300142, China)
出处
《高速铁路技术》
2018年第2期53-56,共4页
High Speed Railway Technology
基金
中国铁路设计集团有限公司科技开发课题(721771)
关键词
槽型连续梁
桥面布置
温度荷载
横向计算边界条件
车桥耦合动力分析
trough continuous girder
bridge deck layout
temperature load
transverse calculation boundary condition
vehicle-bridge coupling dynamic analysis
