铁道科学与工程学报2016，Vol.13Issue(3)：414-422,9.
用于铺设Ⅱ型板式轨道的大跨连续梁桥合理温度跨度研究
Research on the critical expansion length of large span continuous beam bridge for CRTS ll slab track
摘要
Abstract
Although the structure of large span concrete bridge is widely used in China high -speed railway,the critical expansion length of large span concrete bridge still remains uncertain during the design of CRTS II slab track on bridge.The nonlinear spatial rail -slab -bridge -pier integrated mechanical model was established based on the characteristics of CRTS II slab track on bridge.And the corresponding finite element model was es-tablished in finite element software ABAQUS.With the increasing of expansion length,the stress and deforma-tion characteristics of the track structure were studied under different load cases.Both the design theory of CWR on bridge and limit state method were used to track structure check -calculation in force and deformation.The result shows that different track structure has different degrees of growth with the increasing of expansion length. Among the load cases,contractility caused by bridge temperature has a greater influence.When the expansion length reaches 496m,the stress and deformation of the rail and track slab are not achieved the limitations,but the concrete underlayer has reached the serviceability limit state at this time.Therefore,it is suggested that the ultimate expansion length of the large span continuous beam bridge used for laying the CRTS II slab track should not be greater than 496 m.关键词
铁道工程/CRTSⅡ型板式无砟轨道/底座板/大跨连续梁桥/温度跨度/极限状态法Key words
railway engineering/CRTS II slab track/concrete underlayer/large span continuous beam bridge/expansion length/limit state method分类
交通工程引用本文复制引用
吴青松,任娟娟,刘学毅,刘欢..用于铺设Ⅱ型板式轨道的大跨连续梁桥合理温度跨度研究[J].铁道科学与工程学报,2016,13(3):414-422,9.基金项目
铁路总公司科技研究开发计划资助项目（2015G001－F）；国家自然科学基金资助项目 （）
