铁道科学与工程学报Issue(4)：823-828,6.
大跨度铁路连续梁－拱组合桥与无缝线路相互作用研究
Interaction between long -span continuous arch bridge and continuously welded rail
摘要
Abstract
To study the interaction between continuous arch bridge and CWR (Continuously Welded Rail), nonlinear bar elements were used to simulate the track -bridge contact.Taking the (82.9 +172 +82.9)m prestressed concrete continuous arch bridge with concrete -filled steel tube as an example,a model was estab-lished by considering arch,derrick,girder,track and neighboring structures.The distributions of the longitudinal forces of CWR and the horizontal forces at the top of piers were systematically analyzed under the actions of ben-ding,braking,thermal effect,wind,shrinkage and creep as well as settlement of bearing.The following conclu-sions are obtained:The temperature load in beam has the greater influence on the track that lies in the middle of the beam than at the end of the beam.Under the action of live load and the braking force,the impact that the load position on the middle of structure is bigger.When strong wind reaches at the speed of 1 kN /m,it is neces-sary to consider the effect of wind load.Creep and shrinkage of concrete with drop in temperature have adverse effects on the rail.Under uneven settlement,the maximum stress in track is 4.9 MPa.When designing the rail track,the above factors should be considered.关键词
铁路桥梁/连续梁 -拱组合桥/梁轨相互作用/无缝线路/有限元模型Key words
railway bridge/continuous arch bridge/continuously welded rail/track -bridge interaction/finite element analysis分类
交通工程引用本文复制引用
戴公连,刘瑶..大跨度铁路连续梁－拱组合桥与无缝线路相互作用研究[J].铁道科学与工程学报,2015,(4):823-828,6.基金项目
国家自然科学基金资助项目（50678176）；高速铁路基础联合基金资助项目 （）
