城市轨道交通桥梁墩台纵向线刚度限值问题的研究

Study on Limiting Value of Longitude Line Rigidity of Bridge Pier and Abutment of Urban Rail Transit

阐述了轨道桥梁梁轨相互作用的一些概念、研究现状以及存在的问题。对城市轨道交通桥梁墩台最小纵向刚度的限值的制定的依据、演变以及铁路桥梁的一些区别做了分析比较,对公轨合建桥梁中公路车辆制动力对轨道结构的作用机理做了计算与分析。最后,对地铁规范中的轨道交通桥梁墩台纵向刚度限值条文合理值提出了看法与建议。

Some concepts,research status and the existing problems of the beam-rail interaction of rail bridges are firstly expounded.Then the basis and evolution of establishing the minimum longitudinal rigidity of urban rail transit bridge pier and abutment,and some differences from the railway bridges are analyzed and compared.The effect mechanism of the braking force of the highway vehicles in the highway-rail co-constructed bridge on the track structure is calculated and analyzed.Finally,the opinions and suggestions are put forward for the reasonable value in the longitudinal rigidity limiting value article of the rail transit bridge pier and abutment in the subway code.