Hybrid connection joint between rectangular steel tube concrete column and h-shaped steel beam bolted and welded

Abstract

The invention discloses a stud welding mixed connection node of a rectangular concrete filled steel tubular column and an H-shaped steel girder. The H-shaped steel girder comprises an upper flange, a web and a lower flange, wherein the upper flange, the web and the lower flange are formed together. The rectangular concrete filled steel tubular column comprises an upper steel tube and a lower steel tube which are vertically arranged adjacently. The node comprises an inner separating board welded to the bottom in the upper steel tube, a through separating board welded to the bottom end of the upper steel tube and a vertical connecting board welded to the side of the bottom of the upper steel tube. The top end of the lower steel tube is welded to the lower surface of the through separating board. The upper flange is opposite to the inner separating board and welded to the upper steel tube. The web is connected with the vertical connecting board through high strength bolts. The lower flange is fixedly connected with the through separating board. According to the node, stud welding mixed connection is adopted, the node can be fast installed in the position in a field, a construction period can be obviously shortened, and the assembly process is facilitated. Meanwhile, due to the arrangement of the through separating board, a girder-end plastic hinge is moved outwards, the steel girder is damaged before the node, and safety of the node is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of building structure engineering, and in particular relates to a bolted and welded mixed connection node between a rectangular steel pipe concrete column and an H-shaped steel beam. Background technique [0002] Concrete-filled steel pipe structure refers to a structure formed by filling concrete in steel pipes. The existence of steel pipes can effectively restrain the core concrete, so that the compressive strength and deformation capacity of concrete can be significantly improved. At the same time, the existence of concrete can also effectively prevent Local buckling of the steel pipe is prevented, and the joint work of the two can give full play to the advantages of high tensile performance of steel and good compression performance of concrete, thereby greatly improving the bearing capacity. Concrete-filled steel tube structures are widely used because of their high bearing capacity, light weight, good p...

AI Technical Summary

Problems solved by technology

Due to its own structural measures, the node needs a large enough horizontal ring plate to ensure the strength of the node, and the amount of steel used is large

In addition, the setting of the large-sized outer ring plate makes the indoor corners have convex corners, which affects the appearance and home decoration, brings unnecessary troubles to the architectural design, and has poor adaptability and flexibility.

[0008] (4) Inner diaphragm joints have certain requirements for the size of rectangular steel pipes due to the need for diaphragm welding in rectangular steel pipes, because when the cross-sectional size is small, it is not only difficult to weld, but also affects the pouring of concrete in the pipe, so it is only applicable to steel pipes Nodes with larger cross-sectional dimensions

In addition, the connection between the rectangular steel pipe and the inner partition and the beam is welded, and the rectangular steel pipe is prone to produce large residual stress and deformation under the action of multiple welding, which leads to delamination or brittle failure of the steel at the joint, which affects the joint. Safety

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