论文部分内容阅读
桥上CRTSⅡ型板式无砟轨道设计时采用“线-板-桥-墩”空间一体化模型计算纵向力,模型中轨道板与纵连底座板简化为一层复合结构。建立一种桥上CRTSⅡ型板式无砟轨道“线-板-板-桥-墩”空间一体化模型,将轨道板与纵连底座板分别模拟,并通过砂浆阻力相互作用,模型采用有限单元法求解。采用两种模型对一座大跨连续梁桥上纵连底座板的制动力和伸缩力进行对比计算。结果表明,纵连底座板的制动力和伸缩力采用“线-板-板-桥-墩”空间一体化模型的计算结果更小,纵连底座板配筋设计采用“线-板-桥-墩”空间一体化模型具有更高的可靠性。
In the design of CRTS Ⅱ slab ballastless track on the bridge, the longitudinal force is calculated by using the spatial integration model of “line-slab-bridge-pier”. The slab track and longitudinal base plate in the model are simplified into a composite structure. A model of CRTS Ⅱ slab-track ballastless track “space-slab-slab-bridge-pier” space is established. The slab and slab base plate are simulated respectively and through the interaction of mortar resistance, the model is limited Unit method to solve. Two models are used to compare the braking force and the retracting force of a long-span continuous base plate of a long-span continuous beam bridge. The results show that the calculation results of the integrated model of braking force and retraction force of the longitudinal base plate are smaller than that of the “linear-plate-plate-bridge-pier” - Bridge - pier "spatial integration model with higher reliability.