Energy-dissipating Self-resetting Bridge Seismic Block Structure

Abstract

The invention discloses an energy-dissipating and self-resetting bridge anti-seismic block structure, which comprises a cover beam and a beam body. A shock-absorbing and isolating support is arranged on the top surface of the cover beam. On the support, stoppers are respectively provided at both ends of the cover beam, and the flat end of a concave steel plate with a through hole in the width direction of the protruding part is embedded in the stopper, and the concave steel plate Hinge shaft pins are put through the hole of a flipped steel plate with a through hole in the width direction of the protruding part and a slope surface at the flat end, and the two are connected together to form a living hinge, and a piece is welded on the embedded part of the beam body The end of the cantilever is a steel plate with the same slope angle as the turning steel plate, and several springs are arranged at the end of the turning steel plate, and the springs connect the turning steel plate and the cover beam together. Under the action of an earthquake, the invention can dissipate the seismic energy and realize the self-resetting of the beam body through the movable hinge and several springs, reduce the occurrence of beam falling accidents, and improve the seismic performance of the bridge structure.

Description

technical field [0001] The invention relates to the technical field of bridge anti-seismic and bridge anti-seismic isolation, in particular to an energy-dissipating self-resetting bridge anti-seismic block structure. Background technique [0002] It can be seen from several major earthquakes in recent years that many bridge structures have been damaged due to the lack of reasonable and effective seismic isolation measures or structures. The bridge structure has a large residual displacement after the earthquake, resulting in serious damage to the bridge deck. , Seriously affect driving safety, driving comfort and rescue and reconstruction work in earthquake-stricken areas. Therefore, how to design bridge structure shock-absorbing and isolation structures or devices to make the bridge have a self-resetting function after the earthquake or limit the displacement of the beam body within a certain range is always a bridge. It is a hot topic in engineering research, so as to redu...

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Problems solved by technology

[0002] It can be seen from several major earthquakes in recent years that many bridge structures have been damaged due to the lack of reasonable and effective seismic isolation measures or structures. The beams of bridge structures have a large residual displacement after the earthquake, resulting in serious damage to the bridge deck. , Seriously affect driving safety, driving comfort and rescue and reconstruction work in earthquake-stricken areas. Therefore, how to design the shock-absorbing and isolation structure or device of the bridge structure so that the bridge has a self-resetting function after the earthquake or limits the displacement of the beam body within a certain range is always a bridge. A hot topic in engineering research, so as to reduce the cost of post-earthquake maintenance and reinforcement

[0003] Under the action of strong earthquakes, the lateral displacement of the beam body is relatively large, and it is easy to collide with the block, which will cause shear brittle failure of the block and even the lateral drop of the beam, which will bring huge direct and indirect economic losses. The main reason is that the displacement of the beam body has not been effectively restrained under the action of the earthquake, and the seismic energy has not been reduced or dissipated

[0004] After reading a large number of bridge anti-seismic, anti-seismic and anti-seismic patents, the applicant found that the existing bridge anti-seismic devices seldom start from the addition of buffer energy dissipation anti-seismic structures outside the stoppers. At the same time, the construction of these devices is inconvenient and relatively expensive. high

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