Rectangular steel tube concrete column and steel beam all-bolt connecting joint

Abstract

The invention belongs to the technical field of building structure engineering, and relates to a rectangular steel tube concrete column and steel beam all-bolt connecting joint, which comprises a rectangular steel tube concrete column, a steel beam, an upper through partition board, a lower through partition board, a connecting plate and high-strength bolts. The upper through partition board and the lower through partition board penetrate through a wall of the rectangular steel tube concrete column, and are connected with the periphery of the wall of the rectangular steel tube concrete column via grooved weld joints, the connecting plate is welded with a side wall of the column, the upper through partition board and the lower through partition board, a web plate of the steel beam is connected with the connecting plate via the high-strength bolts, and an upper flange and a lower flange of the web plate of the steel beam are respectively connected with the upper through partition board and the lower through partition board via the high-strength bolts. The invention further discloses a method for manufacturing the rectangular steel tube concrete column and steel beam all-bolt connecting joint. The joint is fast in construction, simple in structure and fine in stress performance and seismic performance, and can meet requirements of outwards movement of plastic hinges.

Description

technical field [0001] The invention belongs to the technical field of building structure engineering, and in particular relates to a rectangular steel pipe concrete column-steel beam connection node. Background technique [0002] Concrete filled steel pipe structure is composed of steel pipes filled with concrete. The existence of steel pipes can prevent premature cracking of concrete, and the existence of concrete can prevent premature buckling of steel pipes. The joint work of the two can give full play to the high tensile performance of steel and the good compressive performance of concrete. Therefore, it has many advantages such as high bearing capacity, good plasticity and toughness, good seismic performance, significant economic benefits and environmental protection in construction. [0003] The rectangular concrete-filled steel tube structure has the advantages of high flexural rigidity and convenient joint connection. The frame structure system formed by rectangula...

AI Technical Summary

Problems solved by technology

[0005] (1) Due to the difficulty of welding inside the joint, the pouring of concrete in the pipe is also affected by the internal diaphragm joint, which is often limited by the side length of the pipe string in application

In addition, there are beam flanges and inner partitions welded on both sides of the same position of the steel pipe column, and the steel is hot-processed twice, which tends to generate large residual stress, resulting in brittle failure near the weld

Although the structure of the joint itself is intended to make the plastic hinge appear at the beam end, the stress concentration at the weld affects the development of the plastic hinge

[0006] (2) Due to the structural characteristics of the node itself, the outer ring plate node has poor adaptability and flexibility

However, judging from the earthquake damage of the Northridge earthquake in the United States and the Hanshin earthquake in Japan, the damage of the bolted and welded joints of steel structures is very serious. The investigation of the damaged connections shows that the welds are prone to quality defects and many cracks Starts at the lower flange weld where the lower flange weld is interrupted and not easily ultrasonically inspected

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