Connection method of viscous damper used for anti-seismic of long-span bridge

Abstract

The invention discloses a connection method of a viscous damper for achieving earthquake resistance of a long-span bridge and relates to the technical field of earthquake resistance of engineering structures. The viscous damper, a left installation plate, a right installation plate and a liftable pedestal are included. The connection method includes the steps that the left installation plate is arranged at a corresponding position of a girder through embedded parts, the right installation plate is arranged at a corresponding position of the girder through embedded parts, and the liftable pedestal is arranged at a corresponding position of a tower pier column through embedded parts; the viscous damper is fixedly connected with the liftable pedestal through hoops, and the height of the liftable pedestal is adjusted so that the viscous damper can be driven by the liftable pedestal to ascend or descend to be adjusted to a connection position; one end of a piston rod is connected with the left installation plate through a left hinged support, and the other end of the piston rod is connected with the right installation plate through a right hinged support. According to the connection method, installation is easy, installation cost is low, the problem that a sealing element is unilaterally stressed is solved, the service life of the viscous damper is prolonged, installation dimensions are small, and earthquake resistance is good.

Description

technical field [0001] The invention relates to the field of anti-seismic technology of engineering structures, in particular to a connection mode of viscous dampers used for anti-seismic of long-span bridges. Background technique [0002] With the frequent outbreak of natural disasters such as earthquakes, bridge anti-seismic disaster prevention devices have attracted the attention of the industry. There are many types of existing bridge anti-seismic devices, such as metal dampers, friction dampers, viscous dampers, viscoelastic Damper etc. The viscous damper is a speed-dependent damping device, which has the advantages of high damping efficiency, low static stiffness, and strong energy dissipation capacity. Viscous dampers are widely used in long-span bridges. [0003] At this stage, the span of the bridge is increasing continuously. In order to ensure that the long-span bridge has sufficient seismic capacity, the stroke, tonnage and weight of the viscous damper installed...

AI Technical Summary

Problems solved by technology

[0008] (1) The installation size of the damper is large, the damper is easily unstable under axial pressure, the damper is easily damaged, and the seal is under pressure on one side, and the seal is easily damaged

[0009] (2) The hooks, pulley mechanism and balance counterweight for lifting the outer cylinder liner of the damper are set on the pier tower column. It is necessary to preset the installation point in the case of high-altitude operations, and the installation is difficult. At the same time, the pulley mechanism And the setting of balance counterweight increases the construction cost

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