Anti-seismic pier capable of avoiding collapse

Abstract

The invention discloses an anti-seismic pier capable of avoiding collapse. The anti-seismic pier comprises four cables which are separately arranged on four sides of the pier, a first magnet group, asecond magnet group, a third magnet group and a fourth magnet group, wherein the first magnet group, the second magnet group, the third magnet group and the fourth magnet group are separately embeddedin the pier and a pile cap; the bottom surface of the pier is provided with four grooves; four shear pins are pre-embedded in the pile cap and extend into the grooves; and the contact surface of thepier and the pile cap is a curved surface and a sliding friction surface. In the event of small earthquakes, the pier can perform friction energy dissipation through the sliding friction surface during the rocking process, and the shift of the center of gravity of the pier can produce a centripetal restoring force to be combined with the anti-shearing effect of the shear pins so as to ensure thatthe pier will not be greatly deformed during the small earthquakes. In the event of large earthquakes, the shear failure of the shear pins occurs, and then the four sets of the magnet groups cooperatewith each other to generate a repulsive force and a suction force to generate the restoring force to cooperating with the cables so as to prevent the pier from overturning due to excessive deformation. The anti-seismic pier capable of avoiding collapse is similar to a tumbler so as to achieve the anti-seismic concept of avoiding collapse during the large earthquakes.

Description

technical field [0001] The invention relates to the technical field of anti-seismic bridges, in particular to an anti-seismic non-falling pier. Background technique [0002] The bridge is a pivotal project of the traffic lifeline, and its construction cost is high. Once it is damaged by an earthquake, it will cause huge economic losses, and it is extremely difficult to repair it after the earthquake. According to previous earthquake data, the damage to the piers of girder bridges is the most common bridge earthquake damage. Bridge piers are the key stress-bearing components of girder bridges. The fracture or collapse of reinforced concrete piers caused by earthquakes will lead to the collapse of the bridge as a whole. Excessive displacement of bridge piers after damage will cause earthquake damage such as falling beams and collisions between beams. The damaged large bridges are not only difficult to repair, but also seriously affect the production and life in the disaster a...

AI Technical Summary

Problems solved by technology

That is, the aseismic performance can be improved by increasing the strength and deformation capacity of the bridge pier itself, and the collapse of the structure can be prevented by properly selecting the position of the plastic hinge and adopting reasonable structural design measures, but the bridge pier will have a large range of irreversible damage under the action of a large earthquake. damage

Images