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Mid-span self-resetting soft-steel energy-dissipation concrete beam

A concrete beam, self-resetting technology, applied in the direction of joists, girders, trusses, etc., can solve problems such as affecting structural stability, and achieve the effects of simple construction, good ductility, and high ductility failure.

Inactive Publication Date: 2013-09-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastic hinges appear at the ends of columns and beams, and shear failure occurs, which affects the stability of the entire structure

Method used

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  • Mid-span self-resetting soft-steel energy-dissipation concrete beam

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Embodiment 1

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 Shown is an embodiment of the mid-span self-resetting mild steel energy-dissipating concrete beam of the present invention. Its length, width and height are 5000mm×250mm×500mm, and the reinforcement ratio is 1%, which is prefabricated from high-strength concrete 7 . It mainly includes internal unbonded prestressed steel strand 1, spiral steel bar 2, mild steel 3, bellows 4, anchorage 5, stirrup 6, and high-strength concrete 7. The three-section concrete beams at the mid-span and the ends of the two spans are prefabricated. The mid-span beam and the beam ends at the two ends connected to the mid-span beam are arranged with spiral steel bars 2 used to restrain the concrete, and the mid-span beam and the beams at both ends are arranged Soft steel 3; after the three sections of concrete beams are fixed on the same horizont...

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Abstract

The invention relates to a mid-span self-resetting soft-steel energy-dissipation concrete beam and belongs to the field of anti-seismic and shock absorption technologies of structural engineering. The mid-span self-resetting soft-steel energy-dissipation concrete beam comprises an unbonded prestressing steel strand, an anchor gear, a corrugated pipe, a reinforcement stirrup, a spiral reinforcing steel bar, soft steel and a high-strength concrete. The full-beam prestressed steel strand provides an elastic restoring force, and meanwhile, a soft steel damper dissipates the earthquake energy under the action of an earthquake to reduce the overall deformation of a concrete beam, realize the high ductile failure of a beam body and finally achieve the purposes of shock absorption and energy dissipation of a whole building. The mid-span self-resetting soft-steel energy-dissipation concrete beam has the characteristics of shock absorption, energy dissipation, good ductility, automatic recovery and simplicity in construction.

Description

technical field [0001] The invention relates to a beam-type structure that can have sufficient bearing capacity under normal use conditions, can concentrate energy consumption during earthquakes, and can recover functions without repair or slight repair after the earthquake, and belongs to the anti-seismic and shock-absorbing functions of structural engineering technology field. Background technique [0002] my country's current anti-seismic thinking is that small earthquakes are not damaged, moderate earthquakes can be repaired, and major earthquakes cannot collapse. This anti-seismic idea requires that the main structure should not be damaged and can be repaired after the structure encounters an earthquake with fortification intensity. After encountering a rare earthquake, the structure is allowed to have major damage, but it cannot collapse and cause casualties. However, due to the uncertainty and complexity of the seismic action, the structure may suffer from an earthqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/26E04B1/98
Inventor 何浩祥韩恩圳吕永伟丛茂林
Owner BEIJING UNIV OF TECH