Electromagnetic type bridge anti-seismic anti-beam-falling device

Abstract

The invention relates to an electromagnetic type bridge anti-seismic anti-beam-falling device and relates to the field of bridge seismic control. The electromagnetic type bridge anti-seismic anti-beam-falling device comprises a first stop block, a second stop block and four coils, wherein the first stop block and the second stop block are fixed to the left end and the right end of a bent cap and poured into a whole with the bent cap; the second coil and the third coil are fixed to the left side and the right side inside a girder before the girder is poured, and the second coil and the third coil are connected with a first steel plate and a second steel plate; the first coil and the fourth coil are arranged in the first stop block and the second stop block; and a third steel plate, a fourthsteel plate and a fifth steel plate are embedded in the surface of the bent cap. When the girder and the stop blocks generate relative displacement, attracting electromagnetic force and repelling electromagnetic force can be generated between the main girder and the two stop blocks, the girder and the stop blocks cannot collide with each other, so that the damage degree of the stop blocks is reduced, and an anti-beam-falling purpose is achieved; and meanwhile, the coils in the stop blocks are used for generating the same level of attraction for a bridge span structure, the bridge vehicle passing process is more stable, and bridge operation stability is greatly improved.

Description

technical field [0001] The invention relates to an electromagnetic bridge anti-seismic anti-fall beam device, which belongs to the field of bridge anti-seismic control. Background technique [0002] The current design and construction of highway bridges in my country has made continuous girder bridges widely used. Since the beginning of the 21st century, my country's high-speed railways have achieved leapfrog development. In the entire mileage of high-speed railways, bridges account for a large proportion. Girder bridges have also been used extensively. In continuous girders, in order to limit the transverse displacement of the bridge superstructure, transverse stops are usually set on the cap girder or abutment. Under the action of an earthquake, the block not only serves as a lateral limit and prevents the beam from falling, but also ensures the seismic safety of the support. [0003] In previous earthquakes, the seismic blocks were damaged to varying degrees. For exampl...

AI Technical Summary

Problems solved by technology

However, at present, domestic bridge workers are still in the stage of perceptual understanding of stoppers, and there are fewer designs and applications of shock-absorbing stoppers and sacrificial stoppers. Seismic codes only use stoppers as a structural measure; However, under the action of horizontal seismic force, the stopper is a component for transmitting and receiving force, so it is inappropriate to design its structure only, and its reasonable design deserves further consideration

Images