Hydraulic vibration dampers for bridges and footbridges viscous

Tk series vibration dampers for bridges and footbridges.pdf

The global trend in bridge design is, among other things, to achieve the largest possible bridge span between individual piers and thus avoid or limit the construction of piers in difficult conditions, e.g. in a river, where the pier also forms an obstacle to the flow, with all the resulting problems. At the same time, there is an effort to create lightweight yet stable structures.

Cable-stayed bridges meet the requirements for lightweight bridge structures with large spans between piers. However, suspension of the bridge deck on cables creates a relatively flexible system that resists shock loads well, but under cyclic dynamic loading, the entire system may oscillate at certain frequencies of the exciting forces.

The result of oscillations can be an uncontrolled increase in forces on some parts of the bridge structure. The dynamic forces that cause them can be wind forces, earthquakes, but also forces from the bridge's payload, such as vehicles and people.

Hydraulic vibration dampers have proven to be the most effective for eliminating or significantly reducing vibrations in the bridge structure and thus dynamic forces. These elements included in the bridge structure not only reduce the response to shock loads, but also absorb the shock energy and convert it into heat, thereby preventing oscillations. With repeated excitation forces, they significantly reduce the amplitude of vibrations and thus protect the bridge structure from unwanted dynamic stress.