SMA beam falling prevention device

Abstract

The invention provides an SMA beam falling prevention device, and relates to the field of bridge engineering. The SMA beam falling prevention device comprises a protection frame; a first anchoring block is arranged in the protection frame; a first stop block is arranged on one side of the first anchoring block; a pressure-bearing spring is arranged on the rear side of the first stop block; a second stop block is arranged on the front side of the pressure-bearing spring, an SMA tension cable is arranged in the protection frame, a fixed limiting block is arranged on one side of the first anchoring block, a limiting hole is formed in the protection frame, a second anchoring block is arranged on the outer side of the other end of the SMA tension cable, and a fastening bolt is arranged on one side of the second anchoring block and is in threaded connection with the SMA tension cable. The SMA beam falling prevention device is achieved through compression deformation of the pressure-bearing spring, the system rigidity is small, the shock absorption and isolation effect of a shock absorption and isolation support is not affected, large beam body stress is transmitted to a pier stud so thatbeam body displacement can be restrained, beam falling can be prevented, self-resetting of the beam body and the support after deformation can be helped, and residual displacement of the beam body and the support can be reduced.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an SMA anti-drop beam device. Background technique [0002] The bridge structure is a joint project in the transportation hub, and it needs to ensure the safety under the action of earthquake. Falling beams are a common form of earthquake damage to bridges, which will paralyze the entire traffic and cause major impacts in all aspects, and it is difficult to repair in time after the earthquake, which is not conducive to earthquake relief after the earthquake. [0003] In order to prevent the damage of falling beams, horizontal connecting beam cables can be used, but this will increase the stiffness of the beam-pier-column connection, which is not conducive to the seismic design, and in order to adapt to the displacement of the beam body, the length of the cables is relatively large, resulting in waste of materials; Limit stoppers can also be used, but collisions will o...

AI Technical Summary

Problems solved by technology

Falling beams are a common form of earthquake damage to bridges, which will cause paralysis of the entire traffic, causing major impacts in all aspects, and it is difficult to repair in time after the earthquake, which is not conducive to earthquake relief after the earthquake

[0003] In order to prevent the damage of falling beams, horizontal connecting beam cables can be used, but this will increase the stiffness of the beam-pier-column connection, which is not conducive to the seismic design, and in order to adapt to the displacement of the beam body, the length of the cables is relatively large, resulting in waste of materials; Limit stoppers can also be used, but collisions will occur when the beam body contacts the stoppers, resulting in damage to the stoppers, which is not conducive to post-earthquake repairs

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