Energy-dissipation self-resetting double-layer rectangular hollow concrete-filled steel tube swing pier structure system

A hollow steel tube and concrete technology, applied in bridges, bridge parts, bridge materials, etc., can solve the problem of difficult to estimate economic losses, and achieve the effect of reducing repair work, easy replacement, and easy realization.

Active Publication Date: 2018-10-19
BEIJING UNIV OF TECH
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Problems solved by technology

The indirect economic losses caused by traffic disruption caused by these

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  • Energy-dissipation self-resetting double-layer rectangular hollow concrete-filled steel tube swing pier structure system
  • Energy-dissipation self-resetting double-layer rectangular hollow concrete-filled steel tube swing pier structure system
  • Energy-dissipation self-resetting double-layer rectangular hollow concrete-filled steel tube swing pier structure system

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Embodiment Construction

[0028] The present invention separates the bottom of the pier from the bearing platform on the basis of conventional reinforced concrete piers, and only connects them through unbonded prestressed FRP tendons and anti-buckling dog-bone metal dampers to realize the swing behavior of the pier to dissipate earthquakes Energy and has a self-resetting function to achieve the purpose of shock absorption and isolation. The structure is mainly used in bridge engineering and river-crossing engineering seismic isolation technology with high seismic performance requirements.

[0029] Such as Figure 1-8 As shown, the present invention is an energy-dissipating self-resetting double-layer rectangular hollow concrete-filled steel pipe swing pier structure system, which mainly includes a pier-cap connection structure, a bridge pier-cap beam connection structure, an unbonded prestressed system and a damper structure. figure 2 Schematic diagram of the pier-cap connection structure for energy-...

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Abstract

The invention discloses an energy-dissipation self-resetting double-layer rectangular hollow concrete-filled steel tube swing pier structure system, and belongs to the field of bridge engineering. Theswing pier structure system is mainly composed of main beams, supporting seats, a coping, a double-layer rectangular hollow concrete-filled steel tube pier, a bearing platform, a non-bonded prestressed fiber reinforced polymer (FRP) reinforcement with a self-resetting function and anti-buckling dog-bone-shaped metal dampers. The double-layer rectangular hollow concrete-filled steel tube pier andthe coping are cast in place to form a whole to be placed on the bearing platform, and are connected with the bearing platform through non-bonded prestressed FRP reinforcement and the anti-buckling dog-bone-shaped metal dampers so as to play the role of self-resetting and dissipate seismic energy. The designed swing pier structure system is clear in mechanical mechanism, on the premise of ensuringsufficient strength and stiffness of the structure system, the seismic action borne by the structure can be reduced by local lift-off of the pier on the bearing platform, the effective energy dissipation capacity and self-resetting capacity are provided, and the problems of serious damage and large residual deformation of a traditional cast-in-situ pier after an earthquake action can be solved.

Description

technical field [0001] The invention belongs to the field of bridge engineering. In particular, it relates to an energy-dissipating self-resetting double-layer rectangular hollow concrete filled steel tube concrete swing pier structure system, which is controlled by unbonded prestressing technology and energy-dissipating components to control the seismic response and residual deformation of the structure. Background technique [0002] my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt. Most of the country is an earthquake zone, especially the western part of my country is mostly a strong earthquake zone, and earthquakes are very frequent. 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 after the earthquake. The number of casualties directly on the bridge was not many, but the eco...

Claims

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Application Information

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IPC IPC(8): E01D19/02E01D101/26
Inventor 杜修力周雨龙韩强金浏
Owner BEIJING UNIV OF TECH
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