速度锁定器对桥上无缝线路的作用分析

摘要

The bridges CWR tracks are different from that of roadbeds, besides temperature stress, the additional longitudinal forces are also exerting in-fluences on the steel rails, especially for the bridges with remarkable temperature span, the additional longitudinal forces are even more complex and larger. Based on the analysis theory of interaction between the beam and the steel rails, it is concluded that the application of lock-up-device can reduce the longitudinal force of steel rails. The feasibility and efficiency of lock-up-device are proved through practical cases.%桥上无缝线路与路基上的不同，其钢轨除受温度力作用之外，还受到桥上附加纵向力作用[1]。特别在温度跨度较大的桥梁上，附加纵向力更复杂、力值更大。基于梁轨相互作用的分析原理，计算得出采用速度锁定器可以降低钢轨纵向力。该文给出的应用实例，能说明速度锁定器的有效性和可行性。