Reinforcement method of reinforced concrete beam column node

Abstract

The invention discloses a reinforcement method of a reinforced concrete beam column node. A steel strand is transversely wound on the core area of the reinforced concrete beam column node, a device for prestressing applies prestree to the steel strand, and a buckle is adopted to carry out butt joint anchoring treatment on two ends of the steel strand when the prestress of the steel strand reaches a preset level. By adopting the above scheme, the method has the advantages: (1) a closed prestress steel strand is adopted to form effective horizontal restrain to the concrete in core area so that the steel strand and the node area co-work to greatly improve the shear resisting bearing capability of the node core area and improve the earthquake resistant capability of the node; (2) the reinforced concrete beam column node has strong applicability and wide application aspect and is suitable for reinforcing namespace nodes; and (3) the reinforced concrete beam column node has favourable economical efficiency and convenient and quick construction.

Description

technical field [0001] The invention relates to a reinforced concrete beam-column joint, in particular to a reinforcement method for a reinforced concrete beam-column joint. Background technique [0002] The beam-column joint is a key component in the frame structure, which plays a role in transmitting and distributing internal forces in the frame and ensuring the integrity of the structure. The damage of beam-column joints under earthquake often leads to the overall collapse of the structure, and the consequences are very serious. Therefore, whether the beam-column joints are safe and reliable is the key to ensure the seismic performance of the frame structure. In seismic design, there is generally a requirement of "strong columns, weak beams, stronger joints". When the engineering structure is due to structural design and construction errors, changes in building functions, low fortification standards of existing buildings, and changes in seismic code provisions, it is ne...

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Problems solved by technology

[0004] (1) The core area of ​​the joint is the column within the beam height range. Due to the space barrier formed by the two-way frame beam, it is difficult to strengthen the joint, which also makes some traditional strengthening methods of the column unsuitable for joint reinforcement;

[0005] (2) The traditional method of strengthening RC frame joints generally has a stress hysteresis effect, which makes the reinforcement material and the original joints less capable of working together, greatly affecting the reinforcement effect

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