重载铁路双柱式桥墩运营性能及加固评价

随着我国重载铁路干线列车的轴重以及载运量的增加,给双柱式桥墩带了许多不利影响,如横向振幅过大、冲击振动加剧等,严重影响了铁路桥梁的安全运营性能。以朔黄铁路双柱式桥墩为主要研究对象,通过理论分析,重点研究不同荷载类型和不同行车速度作用下墩顶横向振幅的变化规律和桥墩的自振频率特性,结合加固后双柱式桥墩运营性能试验,研究其加固效果,为重载铁路双柱式桥墩的维护管理提供科学依据。

On the Evaluation of the Operational Performance of and the Reinforcement of the Double-Column Pier of Heavy-Duty Railways

With the increase of the axle load and the carrying capacity of the trains of the main heavy-duty railways, a large quantity of adverse effects, such as the horizontal amplitude of vibration being too large, the increase of the impact of vibration, etc. , are exerted on the double-column piers of the bridges of heavy-duty railways,which seriously affects the safe-operation performance of railway bridges. With the double-column piers of the Shuo-Huang Railway as the object of our research, and through theoretical analyses, the variation law of the amplitude of lateral vibration and the characteristics of the frequency of natural vibration at the top of the pier under the action of different kinds of loads and different running speeds are studied. Com- bined with the tests of the operational performance of the double-column pier after being strengthened, the strengthening effects of the pier is studied. The paper may provide a scientific basis for the maintenance and management of the double-column piers of the heavy-duty railways.