Rigid hinge joint node of superposed beam and thin-wall steel tube concrete column

Abstract

The invention provides a rigid hinge joint node of a superposed beam and a thin-wall steel tube concrete column. The rigid hinge joint node comprises a concrete precast beam, a thin-wall steel tube, steel tube inner concrete, a U-shaped steel corbel, node cast-in-place concrete and a beam hogging moment reinforcing steel bar, wherein the U-shaped steel corbel comprises a bottom plate, a web plateand an upper flange plate; and the node cast-in-place concrete comprises beam superposed layer concrete and filling concrete at the end part of the steel corbel. The concrete precast beam is directlyplaced on the U-shaped steel corbel, so that the hoisting is convenient; and the reinforcing steel bar at the upper part of the precast concrete superposed beam penetrates through the thin-wall steeltube column, so that the node is hinged under the action of the beam end hogging moment and is rigidly connected under the action of the hogging moment, the force transmission is clear, and the load requirements of various working conditions are met.

Description

technical field [0001] The invention relates to the field of building (structure) construction, in particular to a rigidly hinged connection node form of a composite beam and a thin-walled steel pipe concrete column. Background technique [0002] The beam-column joint corbels of the prefabricated composite structure usually use steel corbels connected with the composite column with the web down. Concrete pouring at the beam end requires an additional formwork process, which is troublesome in construction and poor in appearance. The existing patent (patent number: 2019105106912) discloses a prefabricated building connection node of steel pipe concrete column-precast concrete composite beam, and proposes to use U-shaped steel channel + pre-welded outer ring plate to place the prefabricated beam, but the prefabricated composite beam The upper steel bar of the composite beam is connected with the pre-welded outer ring plate set on the surface of the column steel pipe through the...

AI Technical Summary

Problems solved by technology

[0002] The beam-column joint corbels of the prefabricated composite structure usually use steel corbels connected with the composite column with the web down. Concrete at the beam end needs to increase the formwork process, which is troublesome in construction and has poor visual effect

The existing patent (patent number: 2019105106912) discloses a prefabricated building connection node of concrete filled steel pipe column-precast concrete composite beam, and proposes to use U-shaped steel channel + pre-welded outer ring plate to place the prefabricated beam, but the prefabricated composite beam The upper reinforcement of the composite beam is connected with the pre-welded outer ring plate on the surface of the column steel pipe through the laminated steel plate, which makes it more difficult to pour concrete in the gap between the beam and column joints, and the welding workload on site is large, which affects the construction quality

In addition, when the wall thickness of the steel pipe is relatively thin, the U-shaped steel corbel cannot meet the shear force transmission at the beam end, and it is necessary to install components that directly transmit the shear force to the concrete, and the welding workload of the upper part of the beam end is large, and the connection of the steel bars is complicated. It is difficult to operate the steel bar connection, and it is difficult to ensure the load transfer

There is no report on a rigid-joint joint of thin-walled concrete-filled steel tube columns that does not need to be connected to the column, and is hinged under positive bending moment at the beam end and rigidly connected under negative bending moment.

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