铁道科学与工程学报2018，Vol.15Issue(6)：1469-1474,6.
偏载工况下多线大跨系杆拱连续梁桥梁轨相互作用
Interaction between tied arch continuous bridge and multiple tracks in unbalance load cases
摘要
Abstract
To study the impact of unbalance load cases on interaction between long-span bridge and multiple tracks, a composite bridge with both (77+3×156.8+77) m concrete filled steel tube tied arch and prestressed concrete continuous beam was taken as an example. The beam element with rigid arm was used to simulate the prestressed concrete girder, beam elements with composite sections were used to simulate concrete filled steel tube arch and nonlinear bar element was used to simulate the track resistance. Spatial analysis model for the interaction between the large span continuous bridge with tied arch and multiple tracks was established. The suspender, bearing and track space locations, as well as the impact of rail expansion device were considered. On this basis, the distribution of track longitudinal force, as well as the horizontal force and torque applied to the pier top, was studied in the unbalance loaded case of multiple-track live loads (bending and braking). Research shows that, the interaction between loaded track and unloaded track was smaller due to the larger girder stiffness; under vertical live loads, the bending forces of both loaded and unloaded tracks are similar; when double-track train brakes reversely on one side of heavy load track, the torque generated on the pier top can be more than 8000 kN?m, which should be considered in the design of piers.关键词
铁道工程/铁路桥梁/系杆拱连续梁桥/无缝线路/偏载Key words
railway engineering/railroad bridges/tied arch continuous bridge/continuously welded rail/unbalance load分类
交通工程引用本文复制引用
秦永平..偏载工况下多线大跨系杆拱连续梁桥梁轨相互作用[J].铁道科学与工程学报,2018,15(6):1469-1474,6.基金项目
中国铁路总公司科技研究开发计划资助项目(2015G001-G) （2015G001-G）
