本文分析了列车荷载作用下的高承台桥墩试验数据，并利用试验所得的资料确定桥墩有限元中的关 键参数，在通过计算得到桥墩在动载作用下响应的基础上，从理论上分析了原因，对桥墩设计有指导性意义

At first，the authors analyze to the experiment date of the bridge pier with highiise pile cap under dynamic loading. Then，according to these date，the authors set up a finite element model to compute the response of bridge pier with highrise pile cap under dynamic loading. By contrasting with the different responses between the pier with high-rise pile cap and the pier with low —:ise pile cap，the authors find many facts which are important to design the bridge pier