中南大学学报（自然科学版）2017，Vol.48Issue(1)：233-238,6.DOI:10.11817/j.issn.1672-7207.2017.01.031
大跨度连续梁桥与梁拱组合桥梁轨相互作用比较
Comparison of track-bridge interaction between long-span continuous girder bridge and continuous arch bridge
摘要
Abstract
Different track-bridge interactions on continuous girder bridge and continuous arch bridge were studied.Taking the (82.9+172.0+82.9) m span arrangement as an example,two models were established by considering track-girder-pier-understructure and track-arch-derrick-pier-understructure-girder,respectively.The longitudinal forces distributions of CWR and horizontal forces at pier top were systematically analyzed under the actions of bending,braking,thermal effect,shrinkage and creep,etc.Furthermore,the relevant design parameters were also discussed.The results show that adopting the longitudinal resistance specified in Chinese code and German code,the expansion stresses of rail in continuous girder bridge are 2.0％ and 2.3％ larger than those of continuous arch bridge,and the bending stress of rail with load and without load at continuous girder bridge is 67.8％ larger than that of the continuous arch bridge.The temperature variation and broken rail position have significant effect on the broken rail force.The stresses of rail in two bridges are basically identical under the train braking and the creep and shrinkage of concrete.For the understructure,continuous girder bridge is more sensitive to beam temperature,and the longitudinal force of pier in continuous arch bridge is 176.1 kN larger than that of the continuous girder bridge under the action of running train.关键词
铁路桥梁/连续梁桥/连续梁-拱组合桥/梁轨相互作用/无缝线路纵向力Key words
railway bridge/continuous girder bridge/continuous arch bridge/track-bridge interaction/continuously welded rail分类
交通工程引用本文复制引用
戴公连,刘瑶,刘文硕..大跨度连续梁桥与梁拱组合桥梁轨相互作用比较[J].中南大学学报（自然科学版）,2017,48(1):233-238,6.基金项目
国家自然科学基金资助项目(51378503) （51378503）
中国博士后科学基金资助项目(2015M570687) (Project (51378503) supported by the National Natural Science Foundation of China （2015M570687）
Project(2015M570687) supported by China Postdoctoral Science Foundation) （2015M570687）
