Steel tube concrete diagonal frame column spatial tubular joint and its manufacture method

Abstract

The invention provides an oblique grid column spatial joint for a concrete-filled steel tube and a manufacture method thereof, wherein, four round steel tubes of the joint are crossed at the position of an oval connecting plate, and welding connections are adopted among the four round steel tubes and between the round steel tubes and the oval connecting plate; a circumferential reinforcing plate consists of at least two annular steel plates, is welded on the four round steel tubes on the welded joint of a central plane; two annular plates parallel to the circumferential reinforcing plate are respectively welded on round steel tubes above and under the circumferential reinforcing plate; stiffener plates are welded between the circumferential reinforcing plate and the annular plates in uniform distribution; and joint extending brackets are welded on the annular plates. The manufacture method of the joint comprises the welding among the round steel tubes and the connecting plate, and the welding of the circumferential reinforcing plate, the annular plates and the stiffener plates. The joint has the advantages of clear force transfer, high bearing capacity, light weight, good performance and convenient construction, can effectively connect an upper oblique grid column and a lower oblique grid column so as to realize the spatial intersection of the joint of the concrete-filled steel tube column, and have excellent engineering application foreground.

Description

technical field [0001] The invention relates to the field of structural engineering in civil engineering, in particular to a space intersecting node structure of steel pipe concrete oblique grid columns and a manufacturing method thereof. Background technique [0002] Since the mid-1960s, CFST has been introduced into my country, and has been widely used in the construction of high-rise and super high-rise buildings and long-span bridges due to its superior mechanical properties. On the one hand, due to the restraining effect of the steel pipe on the filled concrete, the concrete is in a stress state of three-dimensional compression, so that its compressive strength can be fully exerted; on the other hand, due to the filling effect of the concrete, the buckling resistance of the steel pipe under the action of axial force is improved. ability. With its very reasonable material combination, the steel tube concrete structure can give full play to and utilize the characteristic...

AI Technical Summary

Problems solved by technology

Especially for the intersecting joints of concrete filled steel tube columns, the structure is complex and the force transmission is not very clear. So far, there is no complete set of joint structure and calculation theory, and further experimental research and theoretical analysis are needed.

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