论文部分内容阅读
为了揭示各种因素对桥上纵连板式无砟轨道制动附加力的影响,为轨道和桥梁设计提供基础参数,运用空间有限梁单元理论,建立了桥上纵连板式无砟轨道线板桥墩空间一体化纵向力计算模型,并编制了相应的计算软件。运用所编制的计算软件,分析了扣件阻力、底座板与桥梁摩擦系数、道床板伸缩刚度以及底座板与桥梁固结机构对制动附加力的影响。结果表明:对16 kN/m的制动力,扣件阻力在16 kN/m及以上变化,钢轨、道床板及桥梁墩台的纵向力变化很小;增大底座板与桥梁间摩擦系数,墩台顶最大纵向力稍有增加,钢轨和道床板纵向力大幅降低;增大道床板伸缩刚度和取消底座板与桥梁间固结机构,有利于降低墩台顶最大纵向水平力。
In order to reveal the influence of various factors on the additional braking force of bridge slab ballastless track, providing the basic parameters for the design of the track and bridge, using the theory of space limited beam element, the bridge slab ballastless pier Spatial integration of longitudinal force calculation model, and the preparation of the corresponding calculation software. The influence of the fastener resistance, the friction coefficient between the base plate and the bridge, the expansion and contraction stiffness of the ballast, and the additional force on the brakes between the base plate and the bridge fixation mechanism were analyzed by using the calculation software. The results show that for the braking force of 16 kN / m, the resistance of the fastener changes at 16 kN / m and above, and the longitudinal force of the rail, the ballast and the bridge piers change little. The friction coefficient between the base plate and the bridge is increased, The maximum longitudinal force on the top slightly increases, and the longitudinal forces on the rail and the ballast decrease significantly. Increasing the stiffness of the ballast and eliminating the consolidation mechanism between the base plate and the bridge help to reduce the maximum horizontal force at the pier top.