Middle layer joint connecting structure of concrete-filled steel tubular column and reinforced concrete beams

Abstract

The invention relates to the field of structural engineering technologies, in particular to a middle layer joint connecting structure of a concrete-filled steel tubular column and reinforced concrete beams. The middle layer joint connecting structure comprises the concrete-filled steel tubular column and the reinforced concrete beams connected with the concrete-filled steel tubular column. The concrete-filled steel tubular column comprises a steel tube, an annular stiffening plate and vertical stiffening ribs are arranged in the steel tube, column end transition plates are arranged outside the steel tube and connected with upper main reinforcement connecting plates on the upper portions of the reinforced concrete beams and lower main reinforcement connecting plates on the lower portions of the reinforced concrete beams through high-strength bolts, and joint shear reinforcements are arranged at the connecting position between every two adjacent reinforced concrete beams. Connecting joints between the concrete-filled steel tubular column and the reinforced concrete beams are connected through high-strength bolts, concrete is cast, so that stress and plastic deformation capacity of a beam column are improved, the on-site welding quantity is small, construction is easy, and the middle layer joint connecting structure has the advantages of being good in ductility, easy and convenient to manufacture and install and convenient to repair after an earthquake and has good application prospects in the fields of large-scale public buildings and others.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a joint connection structure between a steel pipe concrete column and a reinforced concrete beam mid-level node. Background technique [0002] In the prior art, the connection nodes between the steel pipe concrete columns and the reinforced concrete beams are relatively mature. At present, there are many engineering examples in China that use steel pipe concrete columns to connect reinforced concrete beams or steel beams: the ring-shaped corbel welded on the steel pipe column is welded to the main reinforcement of the reinforced concrete beam, or the connecting plate welded on the steel pipe column Direct welding with the main reinforcement of reinforced concrete beams, etc. [0003] The ring-shaped corbels or connecting plates welded on the above-mentioned steel pipe columns are directly connected to the main bars of the reinforced concrete beams. Although the st...

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Problems solved by technology

However, the structure of CFST column joints is complex and various, and there is still no set of widely applicable structural forms and corresponding calculation methods in China to meet the needs of the development of CFST structures.

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