高铁40m连续梁桥上无缝线路纵向力分析

高铁40m连续梁桥上无缝线路纵向力分析

摘要：我国高铁建设中普遍采用无缝线路，在铁路桥上铺设无缝线路后，钢轨将连续梁和相邻简支梁连接成为整体。梁轨之间、相邻桥梁之间相互影响相互制约，由于梁轨之间的非线性作用，轨道和梁体的受力不同于普通桥梁。本文以6-32m简支梁+(24+40+24)m 连续梁+6-32m简支梁为例，分析了连续梁桥上无缝线路伸缩力、挠曲力、制动力和断轨力的分布规律，考虑了相邻结构和路基的影响。文中得到的结论对今后铁路桥梁的设计有借鉴价值。

关键词：连续梁；桥上无缝线路；伸缩力；挠曲力；制动力abstract: the cwr was commonly used in the construction of china’s high-speed railway. laying the cwr on the railway bridge, the continuous beam and adjacent simply-supported beam were connected by the rail. the interaction took place between beam and track, as well as between adjacent bridges. due to the nonlinear interaction between beam and track, the track and beam force was different from the ordinary bridge. taking the 6-32m simply-supported beam + (24+40+24) m continuous beam +6-32m simply-supported beam as an example, the distribution law for the expansion force, bending force, braking force and fracture force on continuous beam bridge cwr was analyzed, considering the effect of adjacent structure and subgrade. the conclusions obtained in this