A bar with shape memory function

Abstract

The invention discloses a novel bar material with a shape memory function. The novel bar material is characterized in that a central fiber bundle of the novel bar material comprises a cylindrical fiber bundle body, a plurality of thermal induction shape memory fibers are arrayed to form the cylindrical fiber bundle body, an optical fiber sensor is arranged at the central location of the fiber bundle body, a lining layer is arranged o the outer surface of the central fiber bundle, a resistance heating wire is wound on the outer surface of the lining layer, a heat-insulation protective layer sleeves the periphery of the lining layer and is positioned on the periphery of the resistance heating wire, and a bar material body structure of the novel bar material with the shape memory function isformed by the central fiber bundle, the lining layer, the resistance heating wire and the heat-insulation protective layer; anchoring ends are arranged at two ends of the bar material body structure and are provided with metal contact points, and the front end and the rear end of the resistance heating wire are electrically connected with the metal contact points on the corresponding sides of theanchoring ends. The novel bar material with the shape memory function has the advantages that the novel bar material is novel in design, good in durability and corrosion resistance and long in servicelife, and has the deformation recovery ability, and internal strain distribution of the novel bar material can be effectively monitored.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a bar with shape memory function. Background technique [0002] Reinforced concrete structure is the most widely used building material today, and plays an important role in all levels of social development. During the use of traditional reinforced concrete structures, the brittleness of concrete can easily lead to cracking, which in turn leads to the failure of the concrete protective layer and corrosion of steel bars, which affects the normal function of the structure and reduces the service life of the structure. [0003] In addition, for reinforced concrete structures, steel bars and concrete work together to achieve structural functions. During normal use, the force deformation of steel bars is less than the yield strain, which has ideal cooperative performance. However, under accidental loads such as earthquake loads and external force impacts, the tensile yield...

AI Technical Summary

Problems solved by technology

[0005] 1. In reinforced concrete structures, the deformation of steel bars cannot be recovered, which is permanent deformation damage;

[0006] 2. The reinforced concrete structure is deformed by force, and the cracking of the concrete can cause damage and corrosion of the steel bar, further reducing the normal function of the structure;

[0007] 3. Reinforcement strain is related to the internal stress distribution of the component, and is an important indicator reflecting the service state of the component, but ordinary steel bars cannot reflect the internal strain distribution through effective means

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