Steel joint for reinforcing and anchoring concrete beam and anchoring method

Abstract

The invention discloses a steel joint for reinforcing and anchoring a concrete beam. The steel joint comprises a concrete column of an original structure and the to-be-reinforced beam, the concrete column of the original structure is sleeved with a horizontal ring plate and a ring hoop plate, the ring hoop plate is arranged on the horizontal ring plate, one end of the horizontal ring plate is located on the to-be-reinforced beam, and a plurality of newly-arranged longitudinal reinforcing steel bars are connected to the side, close to the to-be-reinforced beam, of the ring hoop plate. The invention further discloses an anchoring method of the steel joint for reinforcing and anchoring the concrete beam. The method comprises the steps of determining the sizes of the outer profiles of the ringhoop plate and the horizontal ring plate; determining the strength grade and thickness of steel of the ring hoop plate and the horizontal ring plate; establishing a finite element analysis model of the steel joint; producing the steel joint in a machining factory, reserving two splicing welding joints, and conducting welding after on-site splicing is completed; splicing and welding the steel joint on site, and pouring structural glue between the steel joint and the concrete column of the original structure. By means of the steel joint for reinforcing and anchoring the concrete beam and the anchoring method, the construction is convenient, the newly-arranged longitudinal reinforcing steel bars are stably anchored, the damage to the original structure is small, and the applicability is high.

Description

technical field [0001] The invention relates to the technical field of concrete beam reinforcement, in particular to a steel node for reinforcement and anchorage of concrete beams and an anchoring method. Background technique [0002] In recent years, there have been more and more projects to reinforce existing buildings for the following reasons. [0003] (1) Buildings that are about to reach the design service life (generally 50 years), such as a large number of reinforced concrete industrial and civil buildings built since the 1950s and 1960s. These houses have been in use for 40 to 50 years. Due to durability problems such as disrepair, the original structure of this type of building has insufficient bearing capacity and endangers the safety of the structure. Reinforcement is required to ensure safe use; [0004] (2) Although the original structure is far from the designed service life, and there are no problems in durability and safety, the original structure needs to ...

AI Technical Summary

Problems solved by technology

[0005] (3) Due to the introduction of new codes, the built buildings designed according to the old codes cannot meet the requirements of the existing codes and need to be reinforced

[0010] (1) The number of planted bars is large, and the planted bars have many holes, which will cause great damage to the original structure and be unfavorable to the original structure;

[0011] (2) The diameter of the steel bar is large, and the hole for planting the bar is large, which will cause great damage to the original structure and be unfavorable to the original structure;

[0012] (3) The anchoring length is long, the reinforcement hole is deep, the drilling is difficult, the damage to the original structure is great, and it is unfavorable to the original structure

And if the anchorage length is not enough, it will lead to the failure of the anchorage of the newly added longitudinal reinforcement, and the effect of reinforcement will not be achieved.

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