The Principle Of Bailey Bridge Vibration Reduction And Isolation

In our country, the early Bailey Bridge was mainly used in the military, that is, military steel bridges. Now Beley Bridge has been widely used in various fields such as rescue and disaster relief, traffic engineering, and reinforcement of dangerous bridges in addition to being used as a war-ready steel bridge. For example, during the 5.12 Wenchuan earthquake in 2008, a large number of Bailey bridges were used for rescue and disaster relief. The Bailey bridge played a key role in the forward transportation of anti-earthquake relief materials, the evacuation of the wounded and the evacuation of the masses.

The Bailey Bridge has the characteristics of large structural rigidity and small deformation, and it is widely used in our country. So what is the principle of the Bailey Bridge for vibration reduction and isolation?

The Bailey Bridge seismic isolation is to reduce the seismic acceleration response and extend the natural vibration period of the structure, and reduce the structure suffered by the earthquake seismic load. For the bridge structure, rubber bearings, polytetrafluoroethylene bearings and other sliding bearings, namely tiles, are used to increase structural flexibility. The purpose of this structure is to extend natural circulation.

Although the period of the structure will be prolonged, the relative displacement between the beam and the abutment will also increase. In order to reduce the relative displacement of the beam and piers due to the extension of the natural vibration period of the structure, it can be used to increase the damping of the structure. Increase the damping of the structure to minimize the displacement caused by the earthquake.