Small angle crossing concrete-filled steel tube column internal stiffening tubular joint and making method thereof

Abstract

The invention relates to a crossing concrete-filled steel tube column tubular joint, and especially relates to a small angle crossing concrete-filled steel tube column internal stiffening tubular joint; two half-circle connecting plates and an oval connecting plate are welded in a middle position of the oval connecting plate so as to form a cross plate; four circular steel tubes are welded with the oval plate and the circular connecting plate on four corners of the cross plate; a circular internal stiffening plate is welded with the inner walls of the circular steel tubes and the oval plate; a vertical stiffening plate is welded with the circular stiffening plate, the circular connecting plate, and the inner walls of the circular steel tubes; extension corbels are welded with steel tube outer walls. The small angle crossing concrete-filled steel tube column internal stiffening tubular joint needs no circular stiffening rib, is concise in joint appearance, and suitable for joints having appearance requirements.

Description

technical field [0001] The present invention crosses the CFST column intersecting node, in particular relates to a small-angle intersecting CFST column node. Background technique [0002] The CFST structure can improve the seismic performance of the structure and reduce the cross-sectional size of the components without significantly increasing the cost. At present, it has been gradually promoted and applied in high-rise buildings, and has good comprehensive economic benefits. The development of high-rise buildings makes It has broad prospects. [0003] The most prominent feature of the CFST oblique grid structure system is that its outer cylinder is composed of two-way cross and continuous oblique columns surrounding the outer surface of the building, which replaces the traditional form of vertical columns and diagonal supports. It has the advantages of high rigidity and good lateral resistance. Due to its unique architectural effect, this structural form is increasingly ...

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Problems solved by technology

[0007] Article 2 of 7.1.1 in the "Technical Regulations for Steel Pipe Structures" stipulates that "the angle between the main pipe and the branch pipe or the axis of the two branch pipes should not be less than 30°", but the actual structural design inevitably uses a small angle rod less than 30° It will cause great difficulties to the design and construction of the joint structure

[0008] The article "Experimental Research on Plane Intersecting Joints of Giant Diagonal Grid in Guangzhou West Tower" proposes a small-angle intersecting joint of pipe fittings, which uses vertical elliptical tension plates and horizontal annular reinforcement plates to realize the fabrication of intersecting joints , but this is an external stiffening method that cannot meet the requirements for appearance in some architectural designs

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