铁路桥梁温度效应对相邻不同墩高的桥墩高程变化的影响研究

相邻桥墩高差过大时,温度效应会引起各桥墩间产生竖向位移差,进而导致轨面产生附加不平顺,对轨道的平顺性及运营安全产生影响。鉴于我国幅员辽阔、地形地貌复杂,部分桥梁相邻桥墩存在较大高差的现象,有必要开展相邻桥墩高差较大时温度效应对不同高度桥墩高程变化的影响研究。采用MIDAS建立有限元模型进行建模,对常见铁路桥梁结构进行分析,并根据计算最终结果,为设计及施工提出指导性建议。

Study on the Impact of Temperature Effect of Railway Bridge on Elevation Variation of Piers of Different Heights

In case of adjacent piers with big elevation differences,the temperature effect may cause vertical displacement difference between the piers,resulting in additional track surface irregularity and impact on the safety and smooth operation of the track. Given China's vast territory,complex geological environment,there tend to be big elevation differences between adjacent piers and it is necessary to study the impact of the temperature effect on the elevation of piers with different heights when elevation differences of adjacent piers are big. In this paper,MIDAS is used to build the finite element model for and analysis,and suggestions are made to guide the design and construction.