ABSTRACT

To mitigate longitudinal vibration of long-span railway suspension bridges, a Combined Viscous-Steel Damping System (CVSDS) is put forward in this paper. In the CVSDS, the viscous damper is expected to work under train braking and frequent earthquakes, while the steel damper can resist rare earthquakes. Moreover, a fuse-lock device is proposed to work as the switch between the aforementioned two dampers. The working mechanism of the CVSDS was introduced. The locking function was verified by static test, and the vibration reduction efficiency of the proposed system was validated through numerical method. The results show that the combined system is efficient.

摘要

为了减轻大跨度铁路悬索桥的纵向振动，本文提出了一种组合粘性钢阻尼系统（CVSDS）。在CVSDS中，粘滞阻尼器有望在列车制动和地震频繁的情况下工作，而钢制阻尼器可以抵抗罕见的地震。此外，还提出了一种熔断器作为上述两个阻尼器之间的开关。介绍了CVSDS的工作机制。通过静态试验验证了锁定功能，并通过数值方法验证了所提出系统的减振效率。结果表明组合系统是有效的。