PC steel rod reinforcement device in the core area of ​​multi-high-rise frame space nodes

Abstract

A device for strengthening a prestressed concrete (PC) steel bars of a panel point core area in a multi-high-rise frame space belongs to the field of civil engineering strengthening construction and comprises the panel point core area, L-shaped anchoring fasteners, the PC steel bars, nuts and sealing caps. A through hole is arranged at one end of each L-shaped anchoring fastener, and a bind hole is arranged at the other end of each L-shaped anchoring fastener and provided with inner threads. The panel point core area is a rectangular area formed by intersecting columns, beams and floor slabs, and polishing treatment is performed to four corners of the panel point core. Two ends of each PC steel bar are provided with outer threads. One end of each L-shaped anchoring fastener is connected with one end of each PC steel bar through the reserved blind hole inner threads, the other end of each L-shaped anchoring fastener penetrates through the other end of each PC steel bar with a reserved through hole to be connected with the nuts. The sealing caps are installed outside the nuts. Four L-shaped anchoring fasteners and four PC steel bars form a circle of PC steel bar hoops for restraining the panel point core area through the nuts. The device can directly bear shearing force, provide three-dimensional restraining effect, relieve stress lagging and improve common working conditions of a novel structure and an existing structure and stress conditions of the core area.

Description

technical field [0001] The invention relates to a PC steel bar reinforcing device for the core area of ​​a space node of a multi-high-rise frame, belonging to the field of reinforcing the core area of ​​a beam-column space node of a reinforced concrete frame. Background technique [0002] In civil engineering construction, reinforced concrete frame structures are widely used for their superior seismic performance. Among them, the beam-column joint is an important part of the frame structure, which plays the role of transmitting and distributing internal forces and ensuring the integrity of the structure. During the earthquake, the shear force in the core area of ​​the node is relatively large and extremely complex, which is a vulnerable part of the frame structure, and the brittle shear failure of the core area of ​​the node often leads to the collapse of the entire structure. In the design, the design principles of "strong shear weak bending, strong column weak beam, stron...

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Problems solved by technology

[0010] Generally speaking, the above reinforcement methods are mostly suitable for the reinforcement design of the core area of ​​planar nodes, but there are difficulties in unloading the structure and high cost, lagging strain of the secondary stressed structure, poor reinforcement effect, and inconvenient on-site construction, etc. many problems

Moreover, for space nodes, due to the existence of perpendicular beams around them, it is inconvenient for the packet reinforcement of the core area of ​​the node. Therefore, the reinforcement problem of the core area of ​​the frame space node has not been well resolved

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