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A self-resetting coupling beam based on superelastic shape memory alloy

A memory alloy and self-resetting technology, which is applied to girders, joists, truss beams, etc., can solve problems such as the complex structure of self-resetting connecting beams, and achieve the effects of improving recoverability, convenient construction, and reducing costs

Active Publication Date: 2021-03-09
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Researchers have proposed a self-resetting connecting beam, which uses prestressed tendons to provide restoring force, and additional angle steel or friction devices to provide energy dissipation capacity, but the structure of this combined self-resetting connecting beam is relatively complicated

Method used

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  • A self-resetting coupling beam based on superelastic shape memory alloy
  • A self-resetting coupling beam based on superelastic shape memory alloy
  • A self-resetting coupling beam based on superelastic shape memory alloy

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no. 1 example

[0029] like figure 1 and figure 2 as shown, figure 1 A schematic diagram of a self-resetting connecting beam based on a superelastic shape memory alloy according to the first embodiment of the present invention is shown. figure 2 show figure 1 A schematic diagram of the other direction of the self-resetting coupling beam shown. The self-resetting connecting beam is installed between two wall piers, including two reinforced concrete connecting beam sections 2, and a self-resetting connecting beam section 1 connecting the two reinforced concrete connecting beam sections 2; the two reinforced concrete connecting beam sections 2 are poured or Prefabricated and assembled on the two wall piers. The self-resetting connecting beam section 1 is made of superelastic shape memory alloy. Here, superelasticity refers to the phenomenon that the alloy undergoes deformation far greater than its elastic limit strain under the action of external force, and the strain can automatically re...

no. 2 example

[0046] The difference between the second embodiment and the first embodiment lies only in the shape of the self-resetting connecting beam section 1 .

[0047] Specifically, similar to the first embodiment, such as Figure 7 As shown, the self-resetting coupling beam is installed between two wall piers, including two reinforced concrete coupling beam sections 2, and a self-resetting coupling beam section 1 connecting the two reinforced concrete coupling beam sections 2; the two reinforced concrete coupling beam sections 2 are respectively Casting or prefabrication is installed on the two wall piers. I-shaped steel 6 is pre-embedded in the reinforced concrete connecting beam section 2, and the self-resetting connecting beam section 1 is fixedly connected with the I-shaped steel 6 through high-strength bolts 5; there is a pad between the self-resetting connecting beam section 1 and the I-shaped steel 6. plate 3.

[0048] Further, in this embodiment, the self-resetting connectin...

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Abstract

A self-resetting connecting beam based on a superelastic shape memory alloy, installed between two wall piers, comprising two reinforced concrete connecting beam sections (2), and a self-resetting connecting beam connecting the two reinforced concrete connecting beam sections (2) Section (1); two reinforced concrete connecting beam sections (2) are respectively poured or prefabricated and assembled on the two wall piers; the self-resetting connecting beam section (1) is made of superelastic shape memory alloy; the reinforced concrete connecting beam section ( The yield bearing capacity of 2) is greater than the yield bearing capacity of the self-resetting coupling beam section (1). The self-resetting coupling beam of the present invention not only consumes energy during an earthquake, but also has no or very small residual deformation after the earthquake, thereby achieving the effect of structural self-resetting. The invention has the advantages of simple structure, flexible design, strong practicability, and convenient construction. Its self-resetting ability can effectively reduce the cost of structure repair or reinforcement, and can effectively and quickly improve the recoverability of the structure after an earthquake. It has broad application in the field of building structures. application prospects.

Description

technical field [0001] The invention relates to the field of anti-seismic equipment, in particular to a self-resetting connecting beam based on a superelastic shape memory alloy. Background technique [0002] In current practical engineering, reinforced concrete shear walls are one of the main lateral force-resisting systems of high-rise and super high-rise structures. It is recognized that the yield mechanism of a reasonable shear wall structure system is that under the action of earthquakes, the coupling beams yield a large amount and bear the main energy consumption, while the yield of the wall piers should be delayed as much as possible, and most of them should be controlled at the bottom of the structure. As the first anti-seismic defense line in the shear wall structure system, the coupling beam plays an important role in the anti-seismic fortification. [0003] Usually, measures to improve the seismic performance of reinforced concrete coupling beams mainly include t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/20E04B1/98E04H9/02
CPCE04C3/20E04H9/021
Inventor 王斌朱松晔
Owner THE HONG KONG POLYTECHNIC UNIV