Precast steel tube concrete ring beam structure and construction method

Abstract

The invention provides a precast steel tube concrete ring beam structure and a construction method. The structure comprises a steel tube concrete column, a steel tube concrete ring beam and a precastreinforced concrete beam, wherein the steel tube concrete column comprises an upper steel tube column, a lower steel tube column, connecting plates, stiffening ribs and column concrete; the pluralityof connecting plates and stiffening ribs are welded at the lower end of the upper steel tube column and the upper end of the lower steel tube column; the stiffening ribs are vertically arranged on corresponding connecting plates; the column concrete is poured inside the upper steel tube column and the lower steel tube column; the steel tube concrete ring beam comprises ring beam steel tubes, anchor bars and ring beam interior reinforced concrete; the ring beam steel tubes comprise upper steel plates, lower steel plates, side steel plates and inner steel tubes; and the upper steel plates and the lower steel plates are respectively arranged at the upper and lower ends of the side steel plates. The precast steel tube concrete ring beam structure disclosed by the invention is high in bearing capacity, high in stiffness, excellent in seismic ductility, excellent in integrity, convenient and rapid in construction, high in construction quality and capable of realizing shift-away of plastic hinge, and meets the requirements of 'strong column and weak beam, strong joints'.

Description

【Technical field】 [0001] The invention belongs to the technical field of prefabricated assembled structures in civil engineering, and in particular relates to a prefabricated steel pipe concrete ring beam connection structure and a construction method. 【Background technique】 [0002] When connecting traditional CFST columns with reinforced concrete beams, reinforced concrete ring beam structures are often used. In the reinforced concrete ring beam structure, it is necessary to set up many longitudinally stressed steel bars and stirrups, and then pour concrete on site. Due to the dense setting of steel bars, formwork must also be erected. , The construction is complicated, the concrete pouring is difficult, and the construction quality is difficult to guarantee. [0003] The experimental results show that the ring beam reinforcement and the size of the ring beam are closely related to the bearing capacity and stiffness of the joints. In order to meet the requirements of beari...

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Problems solved by technology

[0002] When connecting traditional CFST columns with reinforced concrete beams, reinforced concrete ring beam structures are often used. In the reinforced concrete ring beam structure, it is necessary to set up many longitudinally stressed steel bars and stirrups, and then pour concrete on site. Due to the dense setting of steel bars, formwork must also be erected. , the construction is complicated, the concrete pouring is difficult, and the construction quality is difficult to guarantee

[0003] The experimental results show that the ring beam reinforcement and the size of the ring beam are closely related to the bearing capacity and stiffness of the joints. In order to meet the requirements of bearing capacity and stiffness, many steel bars are often installed in the engineering structure and a larger-sized ring beam is used, which makes the cost lower. High and affect the space

Under the action of reciprocating loads, the steel bars often yield first. In the case of insufficient reinforcement or insufficient ring beam size, the ring beam will be damaged first, resulting in joint damage, which does not meet the seismic design requirements; although in this case, the CFST columns are relatively independent , the column is not damaged, but the hysteretic curve of its nodes is often not full, and the bearing capacity and seismic performance are difficult to meet the requirements

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