It is imperative to study the rules of longitudinal force of CWR on bridge and discuss the limit stiffness of pier of the continuous beams that usually used in PDL.

• 新建铁路一次性铺设跨区间之缝线路已成为趋势,研究连续梁桥上无缝线路纵向力变化规律,探讨客运专线常见连续梁桥墩线刚度限值迫在眉睫。