Concrete column reinforcement structure and construction method thereof

Abstract

The invention discloses a concrete column reinforcement structure and a construction method thereof. The concrete column reinforcement structure comprises a UHPC substrate layer, a porous steel plate,a UHPC bonding layer, a fiber woven net and a UHPC protective layer which sequentially coats the side wall of a to-be-reinforced concrete column from inside to outside, wherein the porous steel plateis provided with through holes; and the UHPC bonding layer is bonded with the UHPC substrate layer through the through holes of the porous steel plate. Through the adoption of the UHPC substrate layer, the higher compatibility between a reinforcement layer and an original concrete structure can be achieved, as well as the aging-resistant, high-temperature-resistant and moisture-resistant properties can be good; through the fiber net connection mode, the fiber material interconnection effect of a fiber composite material can be sufficiently exerted, and the fiber material utilization ratio canbe improved; the UHPC substrate and the UHPC bonding layer are tightly bonded through the through holes of the porous steel plate, so that not only can the internal and external UHPC bonding capability be enhanced, but also the corrosion-resistant property and the fire-resistant property can be improved; and all the components of the concrete column reinforcement structure can be combined to forma whole subjected to common stress and deformation, and the mechanical properties of the to-be-reinforced concrete column can be improved.

Description

technical field [0001] The invention relates to a concrete column reinforcement structure, in particular to a concrete column reinforcement structure equipped with prefabricated dense-hole steel plate fiber braided mesh reinforced UHPC, and also relates to a construction method of the concrete column reinforcement structure. Background technique [0002] Due to the aging of concrete structures, unreasonable use of structures, or changes in building functions, the stress and deformation performance of some concrete columns in the structure often cannot meet the requirements, so the reinforcement technology of concrete columns has become more and more widely used. application. [0003] Existing concrete column reinforcement methods include enlarging section reinforcement method, replacement concrete reinforcement method, external prestress reinforcement method, outsourcing steel reinforcement method, externally bonded steel plate reinforcement method, pasting fiber composite m...

AI Technical Summary

Problems solved by technology

[0004] However, both ordinary externally bonded steel plates and pasted fiber composite materials need to use structural adhesives. The durability of structural adhesives is poor, and the level of adhesive and construction technology determine the quality of the reinforcement effect.

Therefore, this reinforcement method has very strict requirements on the environment. The ambient temperature should not be higher than 60°C, and the relative humidity should not be higher than 70%. If there are no special anti-corrosion measures, it is not suitable for use in high temperature and high humidity environments.

Images