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Pier energy-dissipating and crushing-preventing structure internally provided with energy dissipating steel plates and viscous-elastic material layers

A technology of crushing structures and material layers, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of increased residual deformation of bridge piers, easy crushing of bottom segments, and difficult replacement of energy-consuming steel bars, so as to increase energy consumption capacity , Anti-corrosion effect

Active Publication Date: 2016-05-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can improve the energy dissipation capacity of the bridge pier, it will also increase the residual deformation of the bridge pier after the earthquake, and the built-in energy dissipation steel bars are not easy to replace after the earthquake
[0004] Aiming at the problem that the bottom section of piers assembled with dry joint sections is easy to be crushed under earthquake excitation, the most widely used method in engineering is to add constraints to the concrete at the bottom section to improve the deformation capacity of the concrete, including adding constraints to the concrete at the bottom section The amount of stirrups, the use of concrete-filled steel tubes to make the bottom segment, or wrapping FRP outside the concrete of the bottom segment can indeed reduce the damage of the bottom segment under earthquake excitation, but the damaged concrete is also difficult to replace after the earthquake question

Method used

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  • Pier energy-dissipating and crushing-preventing structure internally provided with energy dissipating steel plates and viscous-elastic material layers
  • Pier energy-dissipating and crushing-preventing structure internally provided with energy dissipating steel plates and viscous-elastic material layers
  • Pier energy-dissipating and crushing-preventing structure internally provided with energy dissipating steel plates and viscous-elastic material layers

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Embodiment Construction

[0022] The present invention is a structure that improves the energy dissipation capacity of dry joint section assembled bridge piers under earthquake excitation and prevents the bottom section from being crushed by using replaceable UHPC plates with built-in energy dissipation steel plates and viscoelastic material layers. It is necessary to use replaceable UHPC plates, viscoelastic material layers, energy-dissipating steel plates, precision-rolled threaded steel bars, nuts, high-strength nuts, steel gaskets, embedded steel rods, and rubber cushions.

[0023] The replaceable UHPC boards are respectively provided with two pieces on the four sides of the bottom section of the pier, and a viscoelastic material layer is arranged between the UHPC board and the bottom section of the pier, and the viscoelastic material layer and the UHPC board are connected by cementation, and connected with the bottom section of the pier. The force is transmitted between the sections through frictio...

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Abstract

The invention discloses a pier energy-dissipating and crushing-preventing structure internally provided with energy dissipating steel plates and viscous-elastic material layers. The structure is characterized in that the four sides of a vulnerability area, namely, a bottom section, of a dry-joint section-assembled pier are each provided with two ultra-high performance concrete (UHPC) slabs, the viscous-elastic material layers are arranged between the bottom section of the pier and the UHPC slabs, the UHPC slabs and the bottom section are combined into a whole in the mode that prestress is applied through finish-rolled twisted steel, a pipe is reserved between every two corresponding UHPC slabs, and the energy dissipating steel plates are placed in the pipes. According to the pier energy-dissipating and crushing-preventing structure, it is prevented that the internal bottom section is crushed under exciting of the earthquake action through the UHPC slabs, and the energy dissipating steel plates in the pipes are prevented from being corroded through the compact performance of the UHPC structure; meanwhile, buckling damage to the energy dissipating steel plates can be prevented through UHPC in the peripheries of the pipes, and the energy dissipating steel plates and the viscous-elastic material layers are used for improving the energy dissipating capacity of the dry-joint section-assembled pier under exciting of the earthquake action. By means of the pier energy-dissipating and crushing-preventing structure, it can be guaranteed that the pier has good energy dissipating capacity under exciting of the earthquake action, the bottom section is prevented from being seriously crushed, and the pier is rapidly repaired.

Description

technical field [0001] The invention relates to a rapid construction technology and an anti-seismic design method of a bridge in a medium-high intensity area, in particular to a segmental assembly technology, an external prestressing technology and a shock absorption and isolation technology using metal materials to consume energy, and belongs to the field of civil engineering. Background technique [0002] Due to the advantages of rapid construction and self-resetting ability, dry joint segmental assembled piers have been applied in some river-crossing and sea-crossing bridges, including the Hong Kong-Zhuhai-Macao Bridge and the Canadian Confederation Bridge. This type of bridge pier divides the pier body into several sections vertically, the longitudinally stressed steel bars are broken at the joints of the sections, and the sections are connected by "dry joints" or filled at the joints. Epoxy resin is used to improve the durability of the piers, and then the segments are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D19/02
CPCE01D19/00E01D19/02
Inventor 王景全王震
Owner SOUTHEAST UNIV
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