高速铁路多联大跨连续梁桥上无缝线路纵向附加力规律研究

摘要

高速铁路多联大跨连续梁日益增多,而该情况下桥上无缝线路设计经验较少,探讨桥上无缝线路纵向附加力变化规律,对桥梁墩台及桥上无缝线路设计具有重要意义。建立了钢轨-扣件阻力-梁体-墩台一体化空间非线形有限元梁轨相互作用模型,并利用Ansys分析软件进行求解,计算分析了不同扣件阻力及不同桥跨布置工况下桥上无缝线路纵向附加力,并总结出纵向附加力变化规律,对多联大跨连续梁桥上无缝线路及桥墩设计有直接指导作用。%The increasing number of multi-continuous beams contrasts greatly with the lack of experience of CWR designs,the research on rule of CWR additional longitudinal force is very important to the design of the bridge pier and CWR.＂Rail-Fastener resistance-Beam-Pier＂ combination tridimensional model is established to calculate and analyze the additional longitudinal force due to the variation of fastener resistance and arrangement of continuous beam with Ansys software,thereafter the changing pattern of additional longitudinal force are summarized for reference for the design of the pier and CWR on the multi-continuous beams.