Compound type joint of concrete filled square steel column and concrete beam and construction method thereof

Abstract

The invention discloses a compound type joint structure of a concrete filled square steel column and a concrete beam. The compound type joint structure comprises the concrete filled square steel column and the concrete beam which are connected in a cross mode, and a joint with a swelling section is formed at the crossing position of the concrete filled square steel column and the concrete beam; and a composite strengthening structure is vertically arranged at the joint and in the upper and lower steel pipes of the concrete filled square steel column, the composite strengthening structure comprises four sets of strengthening units composed of with-hole steel plates and with-groove steel plates, and the strengthening units are arranged at the inner walls of the periphery of the upper and lower steel pipes of the concrete filled square steel column correspondingly. The composite strengthening structure bears shear force and bending moment of the joint and transmission of axial force in the column on a joint area, the buckling shape of column steel pipes is improved by the added composite strengthening structure, the shear-bearing capacity of the joint area and the tenacity and the ductility of a whole are enhanced, and the mechanical performance of the system is promoted well.

Description

technical field [0001] The invention relates to a node connection structure of a steel tube concrete column and a concrete beam, in particular to a composite node of a steel tube concrete column and a concrete beam and a construction method thereof. Background technique [0002] Concrete-filled steel tube columns have been used in civil engineering for many years. Concrete-filled steel tube columns have the characteristics of high strength, superior performance, and simple construction. They are widely used in high-rise, long-span, heavy-load and earthquake-resistant buildings. However, due to the particularity of the structural form of CFST columns, the joint form of concrete beams and CFST columns has always been an important and difficult technology. [0003] In actual use, since the concrete beam cannot be directly combined with the steel pipe column, the joint combination form with the beam disconnected and the column continuous is mostly used. This joint form has poor ...

AI Technical Summary

Problems solved by technology

[0003] In actual use, since the concrete beam cannot be directly combined with the steel pipe column, the joint combination form with the beam disconnected and the column continuous is mostly used. This joint form has poor overall performance due to the disconnection of the beam, and due to the beam-column separation beam The shear force and bending moment of the column cannot be effectively transmitted

Images