Double-cantilever steel damping device

Abstract

The invention relates to a double-cantilever steel damping device. The device comprises a bottom plate, a base sliding plate, a guide base, a symmetrical double-cantilever steel damping mechanism anda thrust steel box, the base sliding plate is fixedly installed on the bottom plate, and the guide base capable of sliding in the longitudinal direction of the base sliding plate is further arranged on the base sliding plate. The thrust steel box is arranged on the guide base in a sliding mode in the transverse direction, the middle of the symmetrical double-cantilever steel damping mechanism is connected with the guide base, and the two ends of the symmetrical double-cantilever steel damping mechanism are movably connected with the two sides of the thrust steel box respectively. The verticalanti-drawing function can be selectively provided, and the requirement of a bridge in a high-intensity area for vertical limiting of the seismic mitigation and absorption device is met.

Description

technical field [0001] The invention belongs to the technical field of damping devices and relates to a double cantilever steel damping device. Background technique [0002] In the seismic isolation design of bridges, seismic isolation bearings are generally used to release the huge inertial force of the main girder, and then the displacement of the main girder is limited within an acceptable range by an energy-dissipating limit device. For long-span bridges, viscous dampers are generally used for vibration control along the bridge direction, and metal dampers are generally used for transverse bridge direction; Application prospect. As a common type of metal dampers, steel damping devices are the most competitive, so various types of steel damping devices have been explored and applied in bridge structures in recent years. In the above cases, it is required to be able to adapt to the expansion and contraction deformation of the bridge girder in the longitudinal direction d...

AI Technical Summary

Problems solved by technology

At the same time, the application of existing cases shows that after several years of service, the mechanical behavior of the steel damping device during earthquakes can no longer be guaranteed due to the settlement of the pier column, and its performance during earthquakes is worthy of further discussion

[0003] Chinese patents CN101748685A and CN102953327A have successively disclosed a slidable cylindrical soft steel damper and a triangular plate transverse damping damper suitable for bridge structures, both of which meet the longitudinal sliding of the bridge through the structure of the ball head and the chute displacement requirements, it is not yet possible to provide the function of tensile strength in the vertical direction

At the same time, because the energy dissipation behavior of the steel damping element is very sensitive to the vertical position of the ball head, it is difficult to guarantee the horizontal energy dissipation limit function under the settlement of the bridge pier or vertical earthquake.

In addition, when the demand for seismic displacement is large, the height of the two damping elements is high, and the connection parts such as the top and bottom plates require a large vertical space, and the universality of space installation is very limited.

At the same time, due to the high height of the damping element body, the bending moment at the root is relatively large. Under the earthquake, the anchoring problem of the root under the action of bending and shearing is a more difficult problem.

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