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A Self-resetting Steel Coupling Beam System Using Shape Memory Alloy Tie Rods

A memory alloy, self-resetting technology, applied in the direction of joists, girders, trusses, etc.

Active Publication Date: 2017-09-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no self-resetting steel coupling beam system using shape memory alloy tie rods

Method used

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  • A Self-resetting Steel Coupling Beam System Using Shape Memory Alloy Tie Rods
  • A Self-resetting Steel Coupling Beam System Using Shape Memory Alloy Tie Rods
  • A Self-resetting Steel Coupling Beam System Using Shape Memory Alloy Tie Rods

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 As shown, the present invention adopts a self-resetting steel connecting beam system using a shape memory alloy tie rod, which is composed of a steel connecting beam 2 and a shape memory alloy tie rod 1. In the meantime, the shape memory alloy tie rod 1 runs through the entire length of the steel connecting beam 2, and both ends are anchored to the main structural member 3 connected to the steel connecting beam 2.

[0021] The shape memory alloy tie rod 2 applies a pre-tension force before anchoring, and after anchoring, the pre-tension force will form a pre-compression between the steel connecting beam 2 and the main structural member 3 connected thereto. The two ends of the shape memory alloy tie rod 1 can be designed as threads, and the prestress can be applied by means of bolt fastening, or a special anchoring dev...

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Abstract

The invention discloses a self-resetting steel connecting beam system using a shape-memory alloy tie rod. At present, there is no self-resetting steel connecting beam structure system using a shape-memory alloy tie rod. The steel connecting beam in the present invention can adopt any cross-sectional form and length dimension suitable for actual needs, and the shape memory alloy tie rod runs through the entire length of the steel connecting beam and is anchored to the main structural members at both ends of the connecting beam. A certain prestress is applied to the shape memory alloy tie rod before anchoring, so that a certain prestress is formed between the steel connecting beam and the main structural member connected to it. When subjected to the designed earthquake load, the shape memory alloy tie rod will undergo hyperelastic deformation, and the steel connecting beam will remain in an elastic state except for the local contact stress concentration at the end, and a gap will appear between the steel connecting beam and the main structural members connected. After the load disappears, the gap between the steel coupling beam and the main structural members connected will be eliminated, and the entire coupling beam system will return to its original state without global residual deformation.

Description

technical field [0001] The invention relates to a steel connecting beam system, in particular to an anti-seismic steel connecting beam system which adopts a shape memory alloy tie rod and has a self-resetting function. Background technique [0002] Coupling beam is an important component in building structure, which mainly bears shear force and bending moment. In seismic structures, steel connecting beams are generally designed to allow plastic shear deformation, so as to achieve the purpose of increasing structural ductility and energy dissipation. The above-mentioned plastic shear deformation will cause large residual deformation of the coupling beam structure after the earthquake, and the repair cost will be high. In recent years, the concept of self-resetting structural system has emerged, the core of which is to provide the self-recovering force and energy dissipation capacity of the earthquake-resistant structure by using certain devices, so as to reduce the residual ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98E04C3/04
Inventor 许贤罗尧治
Owner ZHEJIANG UNIV
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