论文部分内容阅读
分析了桥上铺设纵连板式轨道条件下钢轨随桥墩沉降产生变形的机理,并与单元板式轨道条件下的钢轨变形机理进行了对比,在此基础上,推导了纵连板式无砟轨道条件下桥墩沉降和钢轨变形间映射关系的解析表达式,计算了钢轨随桥墩沉降的变形曲线,与此同时采用有限元方法从桥梁结构受力与变形的角度分析了桥墩沉降引起的钢轨变形曲线,并与解析计算结果进行了对比,最后对纵连板式轨道和单元板式轨道条件下钢轨随桥墩沉降的变形曲线进行了对比分析.研究结果表明解析模型和有限元模型均可用于求解纵连板式轨道条件下桥墩沉降和钢轨变形的映射关系;相比于单元板式轨道,纵连板式轨道条件下的钢轨变形更缓和,列车高速通过其沉降区域时产生的激振频率也更低.
The mechanism of deformation of the rail with pier settlement under the condition of longitudinal slab track laying on the bridge is analyzed and compared with the deformation mechanism of the rail under the unit slab track condition. On the basis of that, The analytical expression of the relationship between the settlement of bridge pier and the deformation of the rail is obtained. The deformation curve of the rail with the settlement of the bridge pier is calculated. At the same time, the deformation curve of the rail caused by the settlement of the bridge pier is analyzed by the finite element method The results show that the analytical model and the finite element model can be used to solve the problems of the longitudinal slab track conditions The settlement of the lower pier and the deformation of the rail are compared. Compared with the unit slab track, the deformation of the rail under longitudinal slab track is more moderate and the excitation frequency generated when the train passing through the settlement area is lower.