轨道板和底座板刚度折减对桥上无碴轨道结构受力的影响分析

讨论了在制动力作用下,轨道板和底座板刚度不折减以及采用不同的折减率时,对桥上无碴轨道结构受力的影响.通过对轨道板和底座板不同的开裂程度进行有限元软件的仿真,分析了各自的刚度折减以及对桥上无碴轨道各结构受力的影响.结果证明:施工中如不考虑刚度折减直接采用抗压区的全刚度,计算得出的值较小,而实际中其受力比采用全刚度时大.为类似工程安全提供了参考依据.

The Impact of Braking Force on Ballastless Track of the Bridge Caused by Stiffness Reduction at the Track Plate and Base Plate

The impact of the braking force,on the ballastless track of the bridge was studied when the stiffnese of the track plate and the base plate was not reduced or reduced at different rates. A simulation analysis of the finite element software was made for the different degrees of crackings in the track plate and the base plate, and then the impact of respective stiffness reduction on the ballastless track was analyzed. If the stiffness reduction was not considered in construction, the actual force was much larger than that when the full stiffness was adopted.