Reinforcing process of concrete circular tower column

Abstract

The invention relates to a process for reinforcing a concrete circular tower column. The process comprises the following steps of: (1) additionally arranging prestressed steel wire ropes for reinforcing a seriously cracked area, and tensioning each layer of circumferential prestressed steel wire ropes in multiple sections; and (2) reinforcing a slight cracking area of concrete on the surface of the tower column by using an FRP grid. The FRP grids are fixed by adopting shear keys and protective mortar, wherein the shear keys are fixed in the surface concrete through the shear screws (21), the FRP grids are hung between the shear keys (19) and the surface concrete, gaps are reserved between the shear keys (19) and the surface concrete, and the gaps are filled with protective mortar. After the two reinforcing processes are completed, protective mortar is adopted for covering. According to the reinforcing process, two reinforcing methods of the prestressed steel wire ropes and the FRP grids are comprehensively adopted according to different cracking conditions of the surface of the tower column, the cracking condition of concrete on the surface of the concrete tower column can be effectively improved, and the bearing capacity, ductility and energy consumption of the tower column are improved.

Description

technical field [0001] The invention relates to the technical field of concrete structure reinforcement, in particular to a prestressing and FRP grid reinforcement process for concrete circular tower columns. Background technique [0002] Under the action of natural environment and service environment, due to the influence of cumulative damage, material aging, disaster load design and defects in construction, etc., the concrete circular tower column structure cracks to varying degrees on the surface of each part of the tower column, resulting in internal The steel bars are exposed to the air and are easily corroded, and the resistance of the concrete towers is therefore attenuated. [0003] For structural resistance attenuation, the existing reinforcement methods are mainly divided into two categories, direct reinforcement method and indirect reinforcement method. The direct reinforcement method is to directly improve the bearing capacity and stiffness of the component sect...

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Problems solved by technology

[0004] Existing reinforcement methods can improve the bearing capacity of concrete structures, but when applied to the tower column structure, because the tower column is a high-rise structure, each reinforcement method has certain defects, such as the application of the enlarged section reinforcement method is difficult, and the outsourcing steel reinforcement Therefore, a targeted reinforcement method for concrete tower columns is required

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