High-strength and high-ductility concrete fabricated frame structure system and connecting system thereof

Abstract

The invention provides a high-strength and high-ductility concrete fabricated frame structure system and a connecting system thereof. According to the high-strength and high-ductility concrete fabricated frame structure system, a column longitudinal bar penetrates through the upper end and the lower end of a concrete prefabricated column to form an upper prefabricated column longitudinal bar and alower prefabricated column longitudinal bar and is exposed in a joint core area, column stirrups are prefabricated outside the exposed parts of the column longitudinal bar, and a prefabricated corbelis arranged at the top of a prefabricated reinforced concrete column in the joint core area; the lower portions of two side prefabricated reinforced concrete beams are in lap connection in the jointcore area through a lower longitudinal bar, the upper portions of the two side prefabricated reinforced concrete beams are connected through a beam upper longitudinal bar, which penetrates through beam stirrups and the joint core area and are then poured with high-strength and high-ductility concrete. According to the high-strength and high-ductility concrete fabricated frame structure system, thejoint column longitudinal bar and the beam upper longitudinal bar have no break in the joint core area, so that steel bar connection can be avoided in the joint core area with complex stress but at column inflection points with small bending moment, and structural integrity and anti-seismic properties can be avoided. Without sleeves, the high-strength and high-ductility concrete fabricated framestructure system is convenient to manufacture and install, reduces working procedures, professionals and achieves easy control.

Description

technical field [0001] The invention belongs to the technical field of prefabricated concrete structures, and in particular relates to a high-strength and high-ductility concrete prefabricated frame structure system and a connection method. Background technique [0002] Frame structure is one of the most commonly used structural forms in precast concrete structures. Because its components are lighter than box structures, prefabricated slab structures or prefabricated shear wall structures, prefabricated concrete frame structures have more advantages in the transportation of components. And the prefabricated frame structure is one of the high-rise frame structure systems, and there have been engineering applications of prefabricated concrete frame structures in high-rise buildings abroad. [0003] Since the prefabricated components are prefabricated in the factory, the quality of the prefabricated components can be well guaranteed, and the safety of the prefabricated structu...

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Problems solved by technology

[0004] At present, my country's prefabricated frame structure mainly uses sleeve grouting to connect steel bars, and then pours ordinary concrete in the core area of ​​the joints. There are mainly the following problems: (1) Due to the large volume, heavy weight and complex connection structure of prefabricated components, In addition, the labor force level in China's construction industry is low, which increases the difficulty of prefabricated building construction that requires a high degree of refinement; (2) Both the sleeve grouting connection and the restraint paddle-anchor connection are difficult to center and the operation is complicated. Disadvantages: Once the steel bars collide or have large errors during construction, the installation will not be possible, which will affect the construction period and cause waste; (3) When grouting into the sleeve, it is difficult to determine the state inside the sleeve, and the quality of grouting is difficult to inspect and grasp. Therefore, There are certain safety hazards; (4) Due to the brittleness of concrete itself, it is difficult to guarantee the seismic performance of the joint area under earthquake action

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