Additional damping limit stop block capable of quantitatively sliding

Abstract

The invention discloses an additional damping limit stop block capable of quantitatively sliding, which is innovated in that the additional damping limit stop block consists of a bottom plate, a limitbaffle plate, a sliding plate, a plurality of damping web plates, a top plate and a rubber pad; a shear bolt can limit the maximum outward sliding amount of the sliding plate; the limit baffle platecan continuously limit the maximum outward sliding amount of the sliding plate after the shear bolt is damaged; the damping web plates can absorb energy in a yield and plastic deformation mode after the sliding plate is contacted with the limit baffle plate so as to play a role in dissipating the energy. The additional damping limit stop block has the advantages that the additional damping limiting stop block capable of quantitatively sliding is provided, the energy absorption effect of the additional damping limiting stop block is good, the effect of limiting the transverse displacement of amain beam is good, the efficiency of a plate-type rubber support is fully utilized, meanwhile, a supporting body can be protected, and repair after earthquake is facilitated.

Description

technical field [0001] The invention relates to a bridge anti-seismic technology, in particular to an additional damping limit stopper capable of quantitative sliding. Background technique [0002] In medium and small-span highway bridges and urban viaducts, plate rubber bearings have been widely used because of their simple structure, economical reliability, and convenient installation and replacement; The beam body and the main beam are usually directly stacked together, and there is no fixing measure between the three. Under the action of an earthquake, the plate rubber bearing and the beam body will slide relative to each other laterally. In order to ensure the seismic safety of the plate rubber bearing and prevent the main For beams to be seated or dropped horizontally, it is usually necessary to install reinforced concrete stoppers on both sides of the cover beam or platform cap; the reinforced concrete stoppers have high rigidity, low ductility, and no energy dissipat...

AI Technical Summary

Problems solved by technology

[0002] In medium and small-span highway bridges and urban viaducts, plate rubber bearings have been widely used because of their simple structure, economical reliability, and convenient installation and replacement; The beam body and the main beam are usually directly stacked together, and there is no fixing measure between the three. Under the action of an earthquake, the plate rubber bearing and the beam body will slide relative to each other laterally. In order to ensure the seismic safety of the plate rubber bearing and prevent the main For beams to be seated or dropped horizontally, it is usually necessary to install reinforced concrete stoppers on both sides of the cover beam or platform cap; the reinforced concrete stoppers have high rigidity, low ductility, and no energy dissipation capacity, which will not only hinder the flexibility of the plate rubber bearing under earthquake action It increases the seismic response of the substructure, and loses the limiting effect on the displacement of the main beam and support due to brittle shear failure.

[0003] A large number of earthquake damage investigations show that the damage of the stopper is generally manifested as brittle shear failure, which leads to no longer restricted lateral displacement of the main girder and excessive sliding of the support, which leads to the lateral seating of the main girder, the support is voided, thrown out, and squeezed , shear damage, etc., and at the same time cause irreparable damage to the cover beam and platform cap

It can be seen that the traditional reinforced concrete block cannot play the effective role of the flexible isolation of the plate rubber bearing, and because of the lack of sufficient plastic deformation capacity, it cannot effectively limit the displacement of the main beam, resulting in the seismic effect of plastic energy consumption

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