CN202767252U - Inner separating board type concrete filled square steel tube column and H type girder semi-rigid node - Google Patents

Abstract

The utility model discloses an inner separating board type concrete filled square steel tube column and an H type girder semi-rigid node. The inner separating board type concrete filled square steel tube column and the H type girder semi-rigid node comprise a concrete filled square steel tube column and an H type girder. Inner separating boards are arranged corresponding to walls of square steel tubes of an upper flange and a lower flange of the girder. Horizontal connecting boards are arranged on the outside of the walls of the square steel tubes of the upper bottom flange and the lower flange of the girder and fixed on the flanges of the girder through high-strength bolts. Stiffening boards are arranged on the walls of the square steel tubes of the upper flange and the lower flange of the girder. A corner connecting piece is formed by each horizontal board and each stiffening board and arranged on the outside of the wall of the concrete filled square steel tube column in a welding mode. Beam columns are connected by the high-strength bolts through connecting boards, structure is simple, and site operation is convenient. Under the action of repeat earthquake load, the placed inner separating boards are capable of avoiding partial bending of the wall of the concrete filled square steel tube column. The adopted stiffening boards are capable of improving bending resistance of the end portion of the node, rotating place of the node is adjusted, and the node is driven to rotate around the end portions of the stiffening boards.

Description

Semi-rigid joints between square concrete-filled steel tube columns and H-shaped steel beams with inner diaphragm

technical field

The utility model belongs to the technical field of construction engineering, and relates to a steel-concrete composite structure, which is particularly suitable for connection nodes between square steel pipe concrete columns and H-shaped steel beams in multi-high-rise steel structures.

Background technique

At present, semi-rigid connections mainly connect beams and columns through high-strength bolts and connectors (angle steel, T-shaped steel, and end plates). The piece is connected to the column wall. in:

(1) The bolt does not penetrate the extended end plate type, that is, the steel beam welded to the end plate is connected to the column through high-strength bolts bolted to the steel pipe column wall. This kind of joint can easily cause local buckling of the steel pipe column wall, and the high-strength bolts and The bolt welding process of the column wall requires high quality, the connection performance is not easy to guarantee, and the bending rigidity is not large, so it is rarely used in engineering practice.

(2) Bolts through the extended end plate type, that is, the steel beam is connected to the column with long high-strength bolts that pass through the column body through welding the end plate or T-shaped steel (T-shaped connectors can also be connected to the steel beam with high-strength bolts). After the concrete in the pipe reaches a certain strength, prestress is applied to the bolt rod. This kind of joint has good ductility and seismic performance, and the joint stiffness is high, but it is difficult to install through-bolts on the construction site, apply and control the bolt prestress, and the on-site construction is also very inconvenient because the bolts need to penetrate through the CFST column. (

(3) Connector type, that is, through connectors (angle steel, T-shaped steel and combined steel plate) and high-strength bolts to connect with the steel tube concrete column, and the beam web is connected to the column with high-strength bolts through the vertical steel plate welded to the column. The beam flange of this kind of joint uses high-strength bolts, which not only improves the ductility and seismic performance of the joint, but also reduces the amount of on-site welding, which is also conducive to on-site installation and construction. However, when the connectors are under repeated earthquake loads, there is no internal diaphragm in the steel pipe to transmit force. Concrete-filled steel tube columns are prone to local buckling of the column wall.

Utility model content

The purpose of this utility model is to improve the anti-seismic performance of the connection node between the square steel tube concrete column and the H-shaped steel beam, provide a new type of node with good deformation capacity and energy consumption capacity, and prevent the structure from collapsing due to the damage of the connection node.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows: it includes a square steel tube concrete column and an H-shaped steel beam, and the web of the H-shaped steel beam runs through the square steel tube concrete column through a vertical connecting plate and high-strength bolts. It is characterized in that internal partitions are respectively provided in the square steel pipe walls corresponding to the upper and lower flanges of the H-shaped steel beam, and horizontal connecting plates are respectively provided outside the square steel pipe walls at the upper and lower flanges of the H-shaped steel beam. The horizontal connecting plate is fixed on the flange of the steel beam through high-strength bolts; stiffening plates are respectively provided on the square steel pipe walls at the upper and lower flanges of the H-shaped steel beam, and the horizontal connecting plate and the stiffening plate form a corner joint welded on the square steel pipe concrete Outside the column wall.

In order to ensure the pouring quality of the concrete at the joints, air holes are set at the four corners of the inner partition with a diameter of 25mm.

In order to facilitate the construction of inner concrete filling, the diameter of the pouring hole on the inner partition should not be less than 200mm.

Compared with the prior art, the beneficial effects of the utility model node are:

1. In the utility model, the beams and columns are connected by high-strength bolts through connecting plates. The structure is relatively simple, and the on-site construction is also very convenient. The connecting plates are welded in the factory to reduce the amount of on-site welding.

2. An inner partition is placed in the central column of the utility model, the force transmission route is clear and reliable, and the local buckling of the square steel tube concrete column wall can be avoided under the action of repeated earthquake loads.

3. In the utility model, since the connections between beams and columns are all bolted connections, the deformation ability is strong and the mechanical performance is reliable.

4. In order to avoid the impact of the rotation of the steel beam on the weld, the stiffening plate method is used to enhance the bending resistance of the end of the node, so as to adjust the position of the node rotation and make the node rotate around the end of the stiffening plate.

5. The semi-rigid joints have good deformation capacity and energy dissipation capacity. By controlling the plastic hinge at the end of the beam, the seismic energy can be dissipated to prevent the collapse of the structure caused by the damage of the joints.

Description of drawings

Fig. 1 is the main view structural representation of node of the present utility model;

Fig. 2 is a top view structural schematic diagram of the node of the utility model.

In the figure: 1-square concrete-filled steel pipe column; 2-H-shaped steel beam; 3-inner partition; 4-horizontal connecting plate; 5-vertical connecting plate; 6-stiffening plate.

specific implementation plan

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

As shown in Figures 1 and 2, the utility model includes a square concrete-filled steel tube column 1 and an H-shaped steel beam 2, and the web of the H-shaped steel beam 2 runs through the square concrete-filled steel tube column 1 through a vertical connecting plate 5 and high-strength bolts. , internal partitions 3 are respectively provided in the square steel pipe walls corresponding to the upper and lower flanges of the H-shaped steel beam 2, and horizontal connecting plates are respectively provided outside the square steel pipe walls at the upper and lower flanges of the H-shaped steel beam 2 4. The horizontal connecting plate 4 is fixed on the flange of the H-shaped steel beam 2 through high-strength bolts; the stiffening plate 6, horizontal connecting plate 4 and The stiffening plate 6 forms a corner connector and is welded outside the wall of the square steel tube concrete column 1 .

In order to ensure the pouring quality of the concrete at the nodes, air holes are set at the four corners of the inner partition plate 3 with a diameter of 25mm.

In order to facilitate the construction of inner concrete filling, the diameter of the pouring hole on the inner partition should not be less than 200mm.

During construction:

1. Position the horizontal connecting plate 4, the vertical connecting plate 5 and the stiffening plate 6 outside the wall of the square steel tube concrete column;

2. Weld the horizontal connecting plate 4, the vertical connecting plate 5 and the stiffening plate 6 on the outside of the square steel tube concrete column wall;

3. The inner partition 3 is flush with the horizontal connecting plate 4 outside the wall of the square concrete-filled steel tube column 1, and welded in the wall of the square steel tube concrete column 1;

4. Connect the flange of the H-shaped steel beam 2 with the horizontal connecting plate 4 with high-strength bolts, and connect the web of the H-shaped steel beam 2 with the vertical connecting plate with high-strength bolts.

Claims (3)

1. an internal partition formula concrete-filled steel square tubular column and H section steel beam structures with semi-rigid joints, it comprises concrete-filled steel square tubular column and H section steel beam, the web of H section steel beam is applied on the concrete-filled steel square tubular column by vertical junction plate and high-strength bolt, it is characterized in that, in the square steel tube wall corresponding to the upper and lower edge of a wing of H section steel beam, be respectively equipped with internal partition, be respectively equipped with horizontal connecting plate outside the square steel tube wall at place, the upper and lower edge of a wing of H section steel beam, horizontal connecting plate is fixed on the girder steel edge of a wing by high-strength bolt; Square steel tube wall at place, the upper and lower edge of a wing of H section steel beam is respectively equipped with stiffener, and horizontal connecting plate and stiffener form an angle connector and be welded on outside the concrete-filled steel square tubular column wall.

2. internal partition formula concrete-filled steel square tubular column as claimed in claim 1 and H section steel beam structures with semi-rigid joints is characterized in that, establish air-vent four jiaos of internal partitions, and its aperture is 25mm.

3. internal partition formula concrete-filled steel square tubular column as claimed in claim 1 or 2 and H section steel beam structures with semi-rigid joints is characterized in that, the pouring hole aperture on the internal partition should be not less than 200mm.

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