Steel reinforced concrete composite structure beam column core area joint structure and construction method

Abstract

The invention discloses a steel reinforced concrete composite structure beam column core area joint structure and a construction method. The joint structure comprises a steel reinforced concrete column and a concrete beam in the flange and web direction. The steel reinforced concrete column comprises a profile steel stand column and column longitudinal steel bars arranged on the periphery of the profile steel stand column, a plurality of octagonal stirrups and peripheral stirrups are arranged on each column longitudinal steel bar at intervals, and a plurality of steel bar drag hooks are arranged between a profile steel stand column web and the column longitudinal steel bars. The flange direction concrete beam comprises a plurality of rows of flange direction concrete beam longitudinal main reinforcements and flange direction concrete beam stirrups; the web direction concrete beam comprises a plurality of rows of web direction concrete beam longitudinal load-bearing steel bars and a plurality of web direction concrete beam stirrups. The joint structure is matched with the construction method thereof, construction is convenient, the construction efficiency of the joint structure is greatly improved, meanwhile, strength weakening and stress concentration caused by section steel column flange and web opening are avoided, and it is ensured that the strength of the steel reinforced concrete composite structure can meet the design requirement.

Description

technical field [0001] The invention belongs to the field of construction, and relates to a beam-column core area node structure and a construction method of a steel-concrete composite structure. Background technique [0002] The steel-reinforced concrete stiffness structure is an independent structural form in which the steel is embedded in the reinforced concrete. Fire requirements. However, the disadvantages of this type of structure are that the connection between the steel frame and the steel frame is complicated, the construction is difficult, and the construction quality is difficult to guarantee. Therefore, the connection between the steel frame and the steel frame in the rigid structure has become the top priority in the construction, especially the beams and columns. Core area and column hoop and hook connection area. This aspect not only has high requirements on the level of deepening, but also puts forward higher requirements on the accuracy of on-site installa...

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Problems solved by technology

However, the disadvantages of this type of structure are that the joints between the steel frame and the steel bar are complicated, the construction is difficult, and the construction quality is difficult to guarantee. Therefore, the connection between the steel bar and the steel frame in the rigid structure becomes the top priority in construction, especially the beam column. Core area and column hoop and hook connection area

This aspect not only requires a high level of deepening, but also puts forward higher requirements for on-site installation accuracy. At present, the commonly used intersection joints in the core area of ​​​​beams and columns mostly use beam longitudinal reinforcements to penetrate, column flanges and webs to open holes, and column hooks to penetrate the web. The plate opening measures, considering that the thickness of the web and flange of the shaped steel column is usually 60mm, and the thickness of the base material is thick, the web perforation is likely to produce stress concentration to a certain extent, which weakens the strength of the section. Embrittlement, which affects the properties of steel materials

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