Energy dissipation self-reset anti-seismic retaining block structure for bridge

Abstract

The invention discloses an energy dissipation self-reset anti-seismic retaining block structure for a bridge. The structure comprises a cap beam and a beam body, seismic mitigation and absorption supports are arranged on the top surface of the cap beam, the beam body is supported on the seismic mitigation and absorption supports, and retaining blocks are arranged at two ends of the cap beam respectively. A flat end of a concave steel plate with a projection portion having a through hole in the width direction is fixedly embedded into each retaining block, a hinge dowel penetrates holes of each concave steel plate and a corresponding turnover steel plate to connect the two to form a movable hinge, a projection portion of each turnover steel plate is provided with the through hole, and a flat end of each turnover steel plate is provided with a slope. A steel plate with a suspension arm end identical to the corresponding turnover steel plate in slope angle is welded to a beam body embedded part, a plurality of springs are arranged at the end of each turnover steel plate, and each turnover steel plate and the cap beam are connected together through the springs. Under seismic action, seismic energy dissipation and self reset of the beam body can be realized by the movable hinges and the springs, beam falling accidents are reduced, and seismic performance of a bridge structure is improved.

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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