Beam-to-column joints of prefabricated concrete frames based on partial high-strength bars

Abstract

The invention discloses a prefabricated assembled concrete frame beam-column connection node based on partial high-strength reinforcement, which includes a prefabricated concrete column (1) and a prefabricated concrete beam (2), and one end of the concrete beam (2) rests on the upper end of the concrete column (1). On the concrete protective layer, a node core area (3) is formed, a U-shaped keyway (21) is left at the end of the concrete beam (2), and a core beam (22) and a PC steel rod (23) are arranged in the U-shaped keyway (21). ), the free end of the PC steel rod (23) stretches out from the end of the concrete beam (2), and a PVC pipe (4) is used in the keyway to treat the PC steel rod without bonding; in the core area of ​​the concrete beam (2) node ( 3) Short pier head steel bars (5) are respectively provided at the inner upper part and the lower part, and full-length ordinary steel bars (6) are provided at the upper part of the concrete beam (2). The beam-column connecting node of the invention has the advantages of low cost, strong shear resistance of the beam-column joint surface, convenient construction, good seismic performance, strong deformation capacity and good crack resistance.

Description

technical field [0001] The invention belongs to the technical field of concrete frame structures, in particular to a beam-column connection node of a prefabricated concrete frame based on partial high-strength ribs, which has low cost, strong shear resistance of beam-column joint surfaces, convenient construction and good seismic performance. Background technique [0002] In order to meet the seismic performance requirements of the prefabricated concrete frame structure, the reliability of the connection between prefabricated columns and prefabricated beams is generally resolved through relevant structural measures. [0003] The currently known connection structure includes a groove at the end of the beam, a steel strand used for the stress reinforcement at the bottom of the beam, and the steel strand is not anchored into the core area of ​​the node, and a U is added to the groove and the node area for lap connection with the steel strand of the hook. Rebar and cast-in-place...

AI Technical Summary

Problems solved by technology

[0008] In short, the problems existing in the existing technology are: high cost of prefabricated concrete frame beam-column connection joints, insufficient shear resistance of the beam-column interface, inconvenient construction, and insufficient seismic performance

Images