Steel tube joint

Abstract

The invention provides a steel tube joint. The steel tube joint comprises a main tube and branch tubes. The axes of the branch tubes intersect with the axis of the main tube. The main tube and the branch tubes are all steel tubes. The steel tube joint is characterized in that a base plate is arranged between the main tube and the branch tubes. Compared with the prior art, the steel tube joint is more reasonable in structural arrangement, overcomes defects of a traditional tubular joint, improves welding conditions of welding joints and obviously improves bearing capacity and stress states.

Description

technical field [0001] The invention relates to a steel pipe node, in particular to a steel pipe node of a steel pipe tower of a transmission line. Background technique [0002] Round steel pipes have unique advantages and are widely used in space truss structures. The connection of steel pipes, that is, node design, is one of the most critical links. Taking the transmission line steel pipe tower as an example, the connection between the steel pipe members of different axes is often in the form of intersecting nodes, that is, the web member is directly welded to the outer surface of the chord, which is often used for the connection of the main inclined material, the inclined material of the tower legs and the tower body. Diaphragm connection and connection of parts such as cross obliques. [0003] The connection between steel pipe members with different axes is often in the form of intersecting nodes, that is, the web member is directly welded to the outer surface of the ch...

AI Technical Summary

Problems solved by technology

This type of intersecting joints is all transmitted by the weld seam, which has extremely high requirements on the weld seam. In order to ensure the welding conditions, the weld root needs to be penetrated. According to the "Steel Structure Design Code" GB50017-2003, the main pipe and branch pipe, or The angle between the two branch pipes must not be less than 30°, which limits the use of this structure

[0004] Since the load is directly transmitted from the branch pipe and the force is concentrated, the stress and deformation of the intersecting part of the main pipe are relatively large, which reduces the bearing capacity of the joint main pipe; The longitudinal stiffeners are welded between the main pipes and the annular stiffeners are welded on the main pipe to increase the stiffness and strength of the joints. However, these stiffeners greatly increase the welding workload, and a large number of welds further cause residual stress and increase the windward area.

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