A bridge and its sacrificial anti-seismic block

Abstract

The invention discloses a bridge and its sacrificial anti-seismic block, wherein the sacrificial anti-seismic block includes a base connected to a cover beam of the bridge, a top arranged above the base, and a dry construction joint between the top and the base; the base The height of the cover beam is the same as that of the side section of the cover beam, and a reserved hole is set in the base; a buffer rubber pad is set on the inner side of the top facing the main beam of the bridge. The invention also provides a bridge and a preparation method thereof. The invention can reduce the risk of bridge beam falling due to earthquake, and the sacrificial anti-seismic block can realize quick replacement after damage. Under the action of an earthquake, the sacrificial anti-seismic block damaged by the collision can be disassembled, and the prefabricated reserved parts can be assembled and replaced. The limit function of the sacrificial anti-seismic block can be restored immediately, which can meet the requirements of subsequent aftershocks or other Functional requirements of the lower limit. The sacrificial anti-seismic block can be prefabricated separately without affecting the construction of the main structure of the bridge, and has a simple structure and convenient construction.

Description

technical field [0001] The invention relates to the field of bridge anti-seismic technology, in particular to a bridge and a sacrificial anti-seismic block. Background technique [0002] Small and medium-span girder bridges are the most commonly used bridge type in my country's road network. The type of support is often a plate rubber bearing without anchorage, and the plate rubber bearing is placed directly between the upper and lower structures without any anchoring. measures, and set sacrificial anti-seismic blocks in the direction of the bridge. Under the action of earthquakes, the plate rubber bearings are prone to slide, causing the main girder to easily collide with the stoppers. The collision effect has a great influence on the seismic response of the bridge structure. Therefore, the sacrificial seismic stop is an important link affecting the seismic response of the bridge structure, and its design strength directly affects the displacement response of the superstruc...

AI Technical Summary

Problems solved by technology

The limiting capacity of the damaged sacrificial seismic stopper decreases, or even loses its limiting capacity, resulting in a large displacement of the main girder or even a drop of the girder, which seriously affects the earthquake relief and post-disaster reconstruction

[0004] At present, sacrificial anti-seismic blocks in small and medium-span girder bridges are generally cast together with the cover beams. Under the action of an earthquake, damage to the sacrificial anti-seismic blocks will lead to damage to the cap beam to a certain extent, increasing the cost of post-earthquake repairs. Moreover, the damaged sacrificial anti-seismic block cannot be repaired or replaced

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