A prefabricated concrete beam-column and column-column joint

Abstract

The invention relates to fabricated concrete beam-column and column-column connecting joints. The concrete beam-column connecting joint comprises precast concrete beams and joint connecting members; the precast concrete beams comprise a left precast concrete beam (1), a right precast concrete beam (2), beam upper portion reinforcements (8), beam lower portion reinforcements (9), a beam upper portion pre-embedded steel slab (601), a beam lower portion pre-embedded steel slab (602), beam upper portion locksets (501), beam lower portion locksets (502), and steel formworks separately fixed on theleft precast concrete beam (1) and the right precast concrete beam (2). At a splicing surface, a mode of corresponding zigzag sections with matching sizes is adopted; the beam upper portion locksets (501) and the beam lower portion locksets (502) are separately pre-embedded in the upper portions and the lower portions of the left precast concrete beam (1) and the right precast concrete beam (2); and after precast steel locks (15) are spliced, the beam upper portion locksets (501) and the beam lower portion locksets (502) are enclosed in prismatic shapes separately.

Description

Technical field: [0001] The invention belongs to the field of structural engineering, in particular to a novel assembled concrete beam-column and column-column connecting node. Background technique: [0002] Prefabricated concrete buildings refer to concrete structure buildings designed and constructed through on-site assembly methods based on factory-produced concrete prefabricated components. Prefabricated concrete buildings can be divided into two categories: full assembly and partial assembly according to the degree of assembly. Most fully assembled buildings are realized through the overall coordination system of laminated beams, laminated slabs, prefabricated columns, and prefabricated stairs. The prefabrication rate is high. At this stage, it is mostly used in multi-layer frame structures; some prefabricated buildings are prefabricated through partial components (external wall panels, balconies, etc.), and connected by cast-in-place concrete on site to form an assembl...

AI Technical Summary

Problems solved by technology

The performance of "wet connection" is the most similar to that of cast-in-place joints, but due to the presence of wet work on site, it will still cause unavoidable environmental, noise and other pollution

There are several commonly used node connection methods in the "dry connection". The welded connection nodes widely used in North America are pre-embedded steel components at the ends of components (steel components are anchored to prefabricated components by bolts, etc.), and then rebuilt on site. Splicing by welding is a rigid connection method, but the process is more complicated and the quality is not easy to guarantee; in recent years, the self-resetting prestressed connection node, which has been widely studied, is made by reserving holes in the components and post-tensioning prestressed joints. However, due to the "pinching effect" brought by the prestressed tendons, the deformation capacity of the structure will be affected; the dry connection of the steel reinforced concrete components is connected to the two parts by bolts at the connection node The internal steel frame flange and the steel plate at the web are spliced, and the bearing capacity of the joint is relatively guaranteed, but it brings a significant increase in steel consumption and damage to the flatness of the structural surface; in summary, a force transmission is clear, New fabricated concrete beam-column and column-column connection nodes with guaranteed cross-section bearing capacity and convenient construction are necessary

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