Self-resetting concrete shear wall with built-in shape memory alloys

A technology of concrete shear walls and memory alloys, which is applied to walls, building components, and earthquake resistance, and can solve problems such as poor external stability of swing walls, large lateral displacement of prestressed self-resetting swing walls, etc.

Active Publication Date: 2019-07-12
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problem of obvious residual displacement of the wall caused by the plastic deformation and damage accumulation of the foot of the wall and other parts of the traditional concrete shear wall during the earthquake a

Method used

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  • Self-resetting concrete shear wall with built-in shape memory alloys
  • Self-resetting concrete shear wall with built-in shape memory alloys
  • Self-resetting concrete shear wall with built-in shape memory alloys

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Embodiment Construction

[0055] The present invention is a built-in SMA self-resetting concrete shear wall, and the present invention will be further described below in conjunction with the accompanying drawings and working performance.

[0056] The structural form of the present invention is as figure 1 and 2 shown. Wherein, the reinforced concrete shear wall panel 1 is formed by pouring concrete into a reinforcement cage formed by internal vertically stressed steel bars, horizontally distributed steel bars and edge restraint stirrups. The reinforced concrete foundation beam 3 is formed by pouring concrete into a reinforcement cage formed by internal stressed steel bars and stirrups.

[0057] The components of the SMA device 2 of the present invention are as image 3 shown. The upper plate 4 and the lower plate 5 are arranged and positioned when the steel cage of the wall is bound, the upper plate 4 is fixed at the foot of the reinforced concrete shear wall panel 1, placed obliquely, the lower pl...

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Abstract

The invention belongs to the technical field of building structures, and relates to a self-resetting concrete shear wall with built-in shape memory alloys. The self-resetting concrete shear wall comprises a reinforced concrete shear wall panel 1 and shape memory alloy (SMA) devices 2. The SMA devices comprise SMA rods and viscoelastic energy dissipation devices. The elastic restoring force generated by the SMA rods drives the wall to return to an initial position when the horizontal load is reduced, and the problem that the wall resetting ability is decreased caused by the loss of prestress during long-term use does not exist. When the wall is laterally deformed, significant restoring force can be produced to drive the wall to reset without the need of excessive deformation, the reset of the wall is realized, the viscoelastic energy dissipation devices convenient to replace can be designed into viscoelastic energy dissipation devices with different damping characteristics according toengineering requirements, wall dynamic characteristics are improved, and the structural performance is optimized.

Description

technical field [0001] The invention belongs to the technical field of building structures, and relates to a shear wall with reset capability, in particular to a reinforced concrete shear wall with energy dissipation capability and reset capability comprising concrete, steel bars, SMA (shape memory alloy) and viscoelastic materials. force wall. Background technique [0002] Earthquakes can cause damage and collapse of buildings, casualties and property losses, and bring huge economic losses to human society. The traditional idea of ​​earthquake-resistant design is to protect life as the primary goal. This ductile design method will lead to large plastic damage and residual deformation of the structure. Normal production and life. Earthquake recoverable functional structure can restore the function without repair or minor repair after the earthquake, which can reduce the impact of the interruption of the building structure function, such as replaceable connecting beams, sel...

Claims

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Application Information

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IPC IPC(8): E04B2/84E04B1/98E04H9/02
CPCE04B2/84E04H9/022E04H9/023
Inventor 徐龙河张焱李忠献
Owner BEIJING JIAOTONG UNIV
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