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为进一步研究桥上纵连板式无砟轨道无缝道岔受力和变形的特点,分析了其在实际工程中常见的底座板发生收缩徐变、底座板存在施工温差和底座板断板三种工况下温度力的变化规律。基于梁轨相互作用关系,建立了“岔—板—桥—墩”一体化空间计算模型,利用有限元法,编制了相应计算程序。经计算分析表明,随着底座板收缩徐变的增大,基本轨温度力和伸缩位移增大;随着底座板施工温差的增大,基本轨温度力和伸缩位移有较大的增长;底座板断板后,会显著增大岔区基本轨温度力和伸缩位移。
In order to further study the force and deformation characteristics of the seamless turnout of the slab track slab track on the bridge, the common shrinkage and creep of the base plate occurred in the actual project, the construction temperature difference of the base plate and the base plate Under the conditions of temperature and force changes. Based on the interaction between beam and rail, an integrated spatial calculation model of “fork-plate-bridge-pier” was established. By using the finite element method, a corresponding calculation program was compiled. The calculation and analysis show that with the increase of shrinkage and creep of the base plate, the temperature and the expansion and contraction of the basic rail increase. With the increase of the temperature difference of the base plate, the temperature and expansion-contraction of the base rail increase greatly. After the plate is broken, the basic rail temperature force and telescopic displacement will be significantly increased in the turnout area.