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

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...

AI Technical Summary

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 exposed, and are easily affected by external environments such as man-made damage. Therefore, it is urgent to propose an efficient and practical reinforcement method

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