Cored bracket haunched type compound concrete-filled steel tube column-steel beam node

Abstract

The invention discloses a cored bracket haunched type compound concrete-filled steel tube column-steel beam node and relates to a joint connection form of compound concrete-filled steel tube columns and steel beams, belonging to the technical field of constructional engineering and bridge engineering. The joint is composed of a compound concrete-filled steel tube column, a steel beam and a force transfer member, wherein the compound concrete-filled steel tube column consists of an inner steel tube, an outer steel tube and filled concrete; the steel beam consists of upper and lower flanges and webs; the force transfer member consists of a steel bracket and an inclined haunch plate; and the steel bracket is composed of upper and lower flanges and webs. The steel bracket webs are continuously penetrated at the joint core, and the upper and lower flanges of the steel bracket are discontinuous inside the inner steel tube; the joint of the steel bracket and the inner and outer steel tubes is subjected to weld reinforcement, and one part, which extends out of the outer steel tube, of the steel bracket is in stud welded connection with the steel beam; and meanwhile, the inclined haunch plate is welded between the steel beam and the compound concrete-filled steel tube column. The joint disclosed by the invention is simple in structure and convenient in construction, combines the form of cored bracket and haunched type joints and has the advantages of high rigidity and strength, high integrity, clear force transfer path and the like, and rigid connection between the compound concrete-filled steel tube column and the steel beam can be realized.

Description

technical field [0001] The invention belongs to the field of building structure engineering technology and bridge engineering technology, and in particular relates to a joint design of a compound steel pipe concrete column-steel beam joint through a corbel and axillary type. Background technique [0002] Composite concrete-filled steel tube column is a new type of composite column developed on the basis of ordinary concrete-filled steel tube column. It can not only reduce the relative cross-sectional area, but also better restrain the core concrete, improve the bearing capacity, ductility and fire resistance of the column. purpose, and high-strength concrete can be used safely and reliably without considering the influence of the axial compression ratio limit. Therefore, the composite steel pipe concrete structure has sufficient anti-seismic and anti-collapse safety reserves, and can be applied to engineering structures in anti-seismic fortified areas. As a key link in stru...

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Problems solved by technology

As a key link in structural design, joints have always been a work that cannot be ignored by engineers. However, the research on the joints of composite steel pipe concrete columns is still in its infancy. It is suitable for the joint form of composite steel pipe concrete structures, especially steel beams and composite The joints of CFST columns are still relatively few, so it is necessary to study the reasonable form of beam-column joints and their joint performance in order to popularize the application of the superior structural form of composite steel tube concrete structures in engineering practice

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