A comb-shaped limit damper suitable for bridge structures

Abstract

The invention discloses a comb tooth-shaped limit damper suitable for bridge structures. The first side end plate is fixed on the bottom end plate, the bottom of each first comb tooth plate is fixed on the bottom end plate, and each first comb tooth plate is fixed on the bottom end plate. One end of the tooth plate is fixed on the first side end plate, the second side end plate is fixed on the bottom of the top plate, the top of each second comb tooth plate is fixed on the bottom of the top end plate, and one end of each second comb tooth plate fixed on the second side end plate; each first comb-tooth plate and each second comb-tooth plate are alternately distributed in turn, and the other end of each first comb-tooth plate is fixed with a first limit end plate, and each second comb The other end of the tooth plate is fixed with a second limit end plate, and each second limit end plate is located between the adjacent first comb tooth plates, and each first limit end plate is located between the adjacent second comb tooth plates. Between the side of the adjacent first comb plate and the side of the second comb plate are connected by corrugated energy-dissipating mild steel, the damper can realize the two-way limit of the bridge in the direction of the bridge and the direction of the bridge, and has energy consumption.

Description

technical field [0001] The invention belongs to the technical field of bridges and relates to a comb-tooth-shaped limit damper suitable for bridge structures. Background technique [0002] Continuous girder bridges are generally equipped with multiple expansion joints, which provide space for the displacement of the main girder under earthquake action, and the risk of girder falling is relatively high. During an earthquake, the girder, pier, support, abutment, bridge deck continuity, main girder transverse connection system, and pier-abutment block of a girder bridge constitute a complete seismic system, and the support has weak constraints on the displacement of the main girder. The bridge deck pavement coordinates the displacement of the main girder in a joint, and plays the role of the connecting girder device. The abutment effectively restrains the longitudinal displacement of the main girder, and the stopper effectively restrains the lateral displacement of the main gir...

AI Technical Summary

Problems solved by technology

However, it should be noted that the limiting effect of the abutment is effective for small bridges. For large and medium-sized bridges, due to the large number of expansion joints, the longitudinal limiting effect of the abutment is greatly reduced. If the back wall of the abutment is damaged, the The restraining effect of the abutment is greatly weakened, resulting in falling beams. There is still a lot of room for improvement in the existing seismic technology and structural measures

[0003] At present, in bridge structures, transverse concrete blocks are usually installed at both ends of the main girder, but in non-strong earthquake areas, longitudinal blocks are often not set, and longitudinal beams are prone to fall under the action of earthquakes

The usual method of longitudinal restraint in strong earthquake areas is to install cables between pier beams. Although it can reduce the occurrence of earthquake damage from falling beams to a certain extent, it basically has no energy consumption effect and has a relatively single function.

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