重载铁路并置T梁横向加固运营性能研究

随着我国既有铁路扩能运输的实施，运营列车整列载运量和单列轴重的增加，既有铁路梁体横向刚度偏小引起桥梁振幅过大、冲击振动加剧等，严重影响了铁路桥梁的安全运营。以朔黄铁路32 m预应力混凝土并置T梁为研究对象，以不同轴重运营列车车辆轮对的蛇行波为激振源，采用理论分析、现场实测方法，研究列车通过横隔板加固联结后桥跨结构的横向振幅的响应过程和变化规律，评价梁体的加固效果，为重载铁路并置梁的加固研究和维护管理提供科学依据。

Study on Operation Performance of Transversely Reinforced Heavy Load Railway Juxtaposition T Beams

With the implementation of heavy load railway transportation and the increasing of the entire train operating capacity and single axle load, the transverse amplitude of the existing railway girder is too large and the impact vibration is increased due to too small stiffness, seriously affecting the safe operation of the railway bridge. This paper takes the 32 m prestressed concrete juxtaposition of T beam of Shuo Huang Railway as the research object, by using the test hunting curves of wheel set of the train as excitation, theoretical analysis and the field measurement method is adopted to study the transverse amplitude response process and the change rule of the train passing through the the bridge span structure with horizontal clapboard reinforcement connection, and assess the strengthening effect of the girder, and provide scientific basis for strengthening and maintenance management research of heavy haul railway juxtaposition beam.