Connecting joint between hollow steel tube concrete column and steel girder and construction method thereof

Abstract

The invention discloses a connecting joint between a hollow steel tube concrete column and a steel girder and a construction method thereof. The joint comprises a hollow steel tube concrete column, a steel girder, an end plate and a high-strength bolt, wherein the end plate is welded at the steel girder end; the steel girder end at the joint is connected with the hollow steel tube concrete column through the end plate and a bolt and is connected with a column through the prestressed high-strength bolt. In the construction method, the concrete in the steel tube can be prefabricated or cast in situ; the end plate can be welded in a factory; bolt holes on the end plate and the steel tube are preformed in the factory; and only bolt connection needs on-site construction. The joint structure has the advantages of economy, practicality, definite force transmission, simple manufacture, high prefabrication degree, convenient construction, and capacities of avoiding on-site welding and improving joint shock resistance and construction benefit.

Description

technical field [0001] The invention relates to a building structure node, in particular to a connection node between a hollow steel pipe concrete column and a steel beam and a construction method thereof. Background technique [0002] The hollow concrete-filled steel tube column is a new type of concrete-filled steel tube structure formed by filling concrete between the inner and outer layers of steel tubes. Compared with the traditional solid steel tube concrete structure, it can reduce the structural weight and increase the bending stiffness of the structure, and has a good application prospect. . The hollow section of the inner steel pipe can also be used as a building threading pipe or a building drainage pipe. Its cross-sectional forms are various, such as square-in-square, square-in-circle, square-in-rectangle, rectangle-in-rectangle, etc. At present, the research on hollow concrete filled steel tubes is mainly limited to the column members, and the research on join...

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Problems solved by technology

The research on the earthquake damage of the Northridge earthquake in the United States in 1994 and the Kobe earthquake in Japan in 1995 showed that the joints using all-welded or bolted-welded joints suffered severe tearing and brittle damage, and also exposed this kind of joint connections that rely too much on welds. defects, such as: on-site welding construction is difficult and the quality of the weld is difficult to guarantee; welding has a great influence on the heat of the steel pipe wall, which is likely to cause brittle damage and affect the ductility of the joint; the steel at the connection part has three-dimensional stress, which cannot form lateral shrinkage and Shear slip, resulting in the formation of a high stress concentration area at the weld of the groove of the beam flange; there is a large stress concentration at the root of the process hole of the beam web, and the transfer of the load path of the node is unreasonable, etc.

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