Reinforcing method for winding thermal excitation embedded shape memory alloy wires on concrete column

A memory alloy wire and concrete column technology, applied in building maintenance, construction, building construction, etc., can solve the problems of being susceptible to man-made damage, exposed reinforcement materials and anchors, etc., to achieve easy finished product protection, small stress loss, and improved The effect of bearing capacity and ductility

Inactive Publication Date: 2017-05-10
DALIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

Due to the use of external prestressed reinforcement in the existing shape memory alloy reinforcement methods, the reinforcement materials and anchors are expos

Method used

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  • Reinforcing method for winding thermal excitation embedded shape memory alloy wires on concrete column
  • Reinforcing method for winding thermal excitation embedded shape memory alloy wires on concrete column
  • Reinforcing method for winding thermal excitation embedded shape memory alloy wires on concrete column

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Embodiment Construction

[0018] The features of the present invention and other relevant features are further described in detail in conjunction with the accompanying drawings, so that those skilled in the art can understand:

[0019] Such as Figure 1 ~ Figure 4 As shown, the present invention specifically relates to a method for reinforcing concrete columns using thermally excited embedded shape memory alloy wires, the method specifically comprising the following steps:

[0020] (1) Determine the location to be reinforced according to the force requirements of the components to be reinforced, and remove all or part of the thickness of the protective layer in the area to be reinforced;

[0021] (2) According to the force requirements of the component to be reinforced, further determine the winding range, spacing and diameter of the shape memory alloy wire 4, determine the size and position of the positioning screw 3, and use the positioning screw 3 to position the shape memory alloy wire 4 to ensure ...

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Abstract

The invention discloses a reinforcing method for winding thermal excitation embedded shape memory alloy wires on a concrete column, and belongs to the field of concrete structure reinforcing. According to the force-bearing requirement of a reinforcing member, the to-be-reinforced zone is determined, and a protection layer of the to-be-reinforced zone is wholly or partially chipped away; according to the force-bearing requirement of the reinforcing member, the winding range, interval and diameter of the thermal excitation embedded shape memory alloy wires are further determined, the size and position of positioning screws are determined; the shape memory alloy wires are positioned through the positioning screws and fixed through anchorage device finally; the shape memory alloy wires are heated to the reverse change finish temperature or above of the shape memory alloy wires so that the shape memory alloy wires can generate restoring force; and heating is stopped, after the shape memory alloy wires are naturally cooled, the protection layer is repaired with epoxy-cement mortar, and the surface of the repaired concrete column is coated with fireproof paint. The reinforcing material is buried in the protection layer, so that the corrosion resistance is good, no anchorage device is exposed, the reinforced structure is good in durability, finished product protection is easy, the structure is consistent with an original structure after being reinforced, and the appearance is not influenced.

Description

technical field [0001] The invention belongs to the field of concrete structure reinforcement, and in particular relates to a reinforcement method for winding a concrete column by adopting thermal excitation embedded NiTiNb shape memory alloy wire. Background technique [0002] There are many types and quantities of various concrete columns in my country, and the length of service is different. Concrete cracking, looseness, collapse, and exposed steel bars often occur, which seriously affects the safety of the structure. Therefore, it is necessary to strengthen the concrete columns that do not meet the force requirements. [0003] The existing reinforcement methods of concrete columns are mainly divided into two categories: passive reinforcement and active reinforcement. Passive reinforcement methods mainly include enlarging section method, pasting steel plate method and pasting fiber composite material method, etc. Due to the simple construction operation, they have been w...

Claims

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Application Information

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IPC IPC(8): E04G23/02
CPCE04G23/0218
Inventor 潘盛山王帅谭岩斌崔瑶王骞田凯论邱文亮黄才良张哲
Owner DALIAN UNIV OF TECH
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