地震荷载和列车制动力作用下铁路桥梁振动控制

Vibration Control of Railway Bridges under Seismic Load and Braking Force of Train

列车在运行以及刹车状态下会对桥体产生非常明显的动力作用。区别于地震作用,刹车荷载对桥体的作用时间和频次较长,但力幅值相对较小,在长期运行中易引起桥体和附属设施疲劳及稳定性下降。通过对铁路桥梁刹车荷载的研究,介绍几种主要的控制方法及在控制刹车荷载时存在的一些应用误区,并给出应用建议。

A train will have a very significant dynamic effect on bridge during operation and braking.Different from seismic action,the braking load has a long action time and a high action frequency on the bridge,but the amplitude of force is relatively small,which is easy to cause fatigue and stability degradation of bridge and auxiliary facilities in the long-term operation.Through the study on the braking load of railway bridges,this paper introduces several main control methods and some misapplications existing in the control of braking load,and puts forward suggestions for application.