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通过空间有限梁单元理论,建立桥上CRTSⅡ型无砟轨道无缝道岔的岔—板—桥—墩一体化模型,分析滑动层摩擦系数对钢轨、道岔、轨道板、底座板、固结机构与墩台等结构部件温度附加力的影响,结果表明:钢轨应力和相对位移随着滑动层摩擦系数的增加而略有增大;摩擦系数较大时,轨道板、底座板总体纵向力有较大幅度提高,对轨道板、底座板受力不利;墩台顶的纵向水平力变化不大,简支梁墩台固定支座附近的固结机构所传递的纵向力显著增加,但是连续梁上固结机构受力变化规律不明显;道岔传力部件所受纵向力均有较大或较小的降低,直尖轨尖端相对曲基本轨、长心轨尖端相对翼轨的位移也都依次减小,滑动层摩擦系数的增加对道岔转换设备和结构传力部件受力是有利的。
Through the finite element theory of space beam, an integrated model of the turnout-plate-bridge-pier of the CRTS Ⅱ seamless turnout on the bridge is established. The influence of the sliding layer friction coefficient on the stability of the rail, turnout, track plate, The results show that the stress and relative displacement of rail increase slightly with the increase of friction coefficient of sliding layer. When the friction coefficient is large, the overall longitudinal force of rail plate and base plate is larger However, the vertical force in the longitudinal direction of abutment abutment fixedly connected with simply supported girder increased significantly, but the continuous girder upper fixing force The force variation of the knot mechanism is not obvious; the longitudinal force of the force transmission components of the turnout has a greater or lesser reduction, the tip rail of the straight rail relative to the basic rail and the displacement of the relative wing rail of the long orbit rail are also reduced in turn The increase of the friction coefficient of the sliding layer is beneficial to force the switch conversion equipment and the force transmission components of the structure.