CN204510482U - A kind of through concrete-filled steel square tubular column of stiffener and H profile steel beam structures with semi-rigid joints - Google Patents

Abstract

The utility model relates to a semi-rigid joint between a square steel pipe concrete column and an H-shaped steel beam of a stiffening plate through type, which is composed of a square steel pipe concrete column, an H-shaped steel beam, a stiffening plate and a connecting piece. Connectors include horizontal connecting plates and angle steel connecting plates. The horizontal connecting plate and the angle steel connecting plate are welded outside the column wall of the square steel pipe concrete column, the upper and lower flanges of the H-shaped steel beam are connected with the horizontal connecting plate with high-strength bolts, and the web plate of the H-shaped steel beam is connected with the angle steel connecting plate It is connected with friction-type high-strength bolts, and a through-type stiffener is installed at the connection between the H-shaped steel beam and the square concrete-filled steel tube column. A vertical groove is opened on the column wall of the square steel-filled concrete column at the position corresponding to the stiffener, and the size is the same as that of the stiffener. As a channel through which the stiffener runs through the square steel tube concrete column. The utility model has clear and reliable node force transmission, has strong deformation capacity and energy consumption capacity, and can improve the anti-seismic performance of building structures.

Description

A semi-rigid joint between square concrete filled steel tube column with stiffened plate and H-shaped steel beam

technical field

The utility model belongs to the technical field of construction engineering, and relates to a composite structure of steel and concrete, which is specifically applicable to a semi-rigid joint between stiffened plate penetrating square steel pipe concrete columns and H-shaped steel beams in multi-story steel structures.

Background technique

The successive earthquakes such as the Northbridge earthquake in the United States in 1994 and the Kobe earthquake in Japan in 1995 showed that steel frames with fully welded rigid joints are prone to brittle failure due to poor joint ductility and large residual stress, which leads to steel structure buildings in earthquake areas. The disaster is quite serious. In recent years, due to the unique advantages of simple joint form, large section moment of inertia, good stability, and easy fire prevention measures, rectangular concrete filled steel tubes have been widely used. However, the joint structure of these rectangular concrete-filled steel tube frame structures is similar to that of steel frame structures. Therefore, there are also problems such as poor joint ductility and large welding residual stress, and they are also prone to brittle failure under earthquake action.

At present, semi-rigid connections mainly connect beams and columns through high-strength bolts and connectors (angle steel, T-shaped steel, and end plates). connect. (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 is easy to cause local buckling of the steel pipe column wall, and the high-strength bolt and the 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 composite steel plate) and high-strength bolts to connect with the steel pipe 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.

Studies have shown that the semi-rigid connected steel frame can prolong the natural vibration period of the structure due to the strong deformation capacity and energy dissipation capacity of the joints. Collapse, thereby greatly reducing earthquake damage, is conducive to earthquake resistance. Therefore, it is of great significance to study the new form of semi-rigid joints and realize the popularization and application of the seismic design of ductile joints in practical engineering.

Utility model content

The purpose of this utility model is to improve the seismic performance of steel structure nodes, to provide a semi-rigid node with stiffened plate through-type square steel pipe concrete columns and H-shaped steel beams with good deformation capacity and energy dissipation capacity, so as to prevent cause the collapse of the structure.

In order to achieve the above object, the technical solution of the utility model is: a semi-rigid joint between a stiffened plate through-type square steel tube concrete column and an H-shaped steel beam, which is composed of a square steel tube concrete column, an H-shaped steel beam, a stiffened plate and a connecting piece. The square steel pipe concrete column includes a square steel pipe 1 and the concrete 6 poured inside; the H-shaped steel beam 2 includes an upper flange, a lower flange and a web; the connecting parts include a horizontal connecting plate 8 and Angle steel connecting plate 4; a horizontal connecting plate 8 and an angle steel connecting plate 4 are welded outside the column wall of the square steel pipe concrete column, and the upper and lower flanges of the H-shaped steel beam 2 pass through the horizontal connecting plate 8 with high-strength bolts 3 Connection, the web plate of the H-shaped steel beam 2 and the angle steel connecting plate 4 are connected by friction-type high-strength bolts 5, and a through-type stiffener 7 is set at the connection between the H-shaped steel beam 2 and the square concrete-filled steel tube column. A vertical groove is opened at the position corresponding to the through stiffening plate 7, and the size is the same as that of the through stiffening plate 7, and the vertical groove is used as a channel for the through stiffening plate 7 to penetrate the square steel tube concrete column.

In the utility model, the concrete-filled steel tube column has a square cross-section. The steel beam is an I-shaped steel beam. The concrete is ordinary concrete, high-strength concrete or self-compacting concrete.

In the utility model, the size of the through-type stiffening plate and the connector can be adjusted according to the expected stiffness of the joint.

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, which have strong deformation ability, reliable stress performance, relatively simple structure, and very convenient on-site construction. The connecting plates are welded in the factory to reduce the amount of on-site welding.

2. In the utility model, the stiffening plate runs through the square concrete filled steel tube column, and its function is equivalent to the internal partition. The force transmission route is clear and reliable, and the force transmission is direct; compared with the internal partition installed in the column, it saves steel.

3. The utility model has good deformation ability and energy consumption ability, and can prevent the collapse of the structure caused by the damage of the connecting nodes by controlling the plastic hinge at the end of the beam to dissipate the seismic energy.

Description of drawings

Fig. 1 is the main view structure schematic diagram of the utility model node;

FIG. 2 is a schematic diagram of the A-A section structure in FIG. 1 .

In the figure: 1 is a square steel pipe; 2 is an H-shaped steel beam; 3 is a high-strength bolt with reinforcement; 4 is an angle steel connecting plate; 5 is a friction-type high-strength bolt; 6 is concrete; connecting plate.

Detailed ways

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

A semi-rigid joint between square concrete-filled steel tube columns and H-shaped steel beams with stiffened plates, wherein: it is composed of square concrete-filled steel tube columns, H-shaped steel beams, stiffening plates and connectors, and the square steel tube concrete columns include square steel tubes 1 And the concrete 6 poured inside; the H-shaped steel beam 2 includes upper and lower flanges and webs; the connecting piece includes a horizontal connecting plate 8 and an angle steel connecting plate 4. First, position the horizontal connecting plate 8, the angle steel connecting plate 4 and the through-type stiffening plate 7 outside the column wall of the square concrete-filled steel tube column, and open a vertical groove on the column wall of the square steel tube concrete column at the position corresponding to the stiffening plate 7, the size The stiffener 7 is used as the channel through which the stiffener 7 penetrates the square steel pipe concrete column; then the horizontal connecting plate 8, the angle steel connecting plate 4 and the stiffening plate 7 are welded on the wall of the square steel pipe concrete column; and then the H-shaped steel beam 2 The upper and lower flanges are connected with the horizontal connecting plate 8 by high-strength bolts 3 , and the web of the H-shaped steel beam 2 is connected with the connecting plate 4 of the angle steel by friction-type high-strength bolts 5 .

The steel pipe concrete column involved in the utility model has a square cross-section; the steel beam is an I-shaped steel beam; the concrete is ordinary concrete, high-strength concrete or self-compacting concrete; the through-type stiffening plate and the connection The size of the member can be adjusted according to the expected stiffness of the joint.

Relevant technical contents not mentioned in the above methods can be realized by adopting or referring to existing technologies.

It should be noted that under the teaching of this specification, those skilled in the art can also make one or another easy change, such as equivalent or obvious deformation. All the above-mentioned variations should be within the protection scope of the present utility model.

Claims (3)

1. a stiffening plate through-type square steel tube concrete column and H-shaped steel beam semi-rigid joint, is characterized in that, is made of square steel tube concrete column, H-shaped steel beam, stiffening plate and connector, described square steel tube concrete column It includes a square steel pipe (1) and concrete (6) poured inside; the H-shaped steel beam (2) includes an upper flange, a lower flange and a web; the connecting piece includes a horizontal connecting plate (8) and angle steel connecting plate (4); the horizontal connecting plate (8) and the angle steel connecting plate (4) are welded outside the column wall of the square steel pipe concrete column, and the upper and lower flanges of the H-shaped steel beam (2) pass through the horizontal The connecting plate (8) is connected with the high-strength bolt (3) through the rib, the web of the H-shaped steel beam (2) is connected with the angle steel connecting plate (4) with the friction type high-strength bolt (5), and the H-shaped steel beam (2) A through-type stiffener (7) is arranged at the joint with the square concrete-filled steel tube column, and a vertical groove is opened at the position corresponding to the through-type stiffener (7) on the column wall of the square steel-filled steel tube concrete column, the size of which is the same as that of the through-type stiffener (7). As a channel through which the through-type stiffening plate (7) runs through the square steel pipe concrete column. 2. The semi-rigid joint between stiffened plate through-type square concrete filled steel pipe column and H-shaped steel beam according to claim 1, characterized in that the concrete is any one of ordinary concrete, high-strength concrete or self-compacting concrete ; The square steel pipe concrete column is in the form of a rectangular section. 3. A semi-rigid joint between stiffened plate through-type square concrete-filled steel tube column and H-shaped steel beam according to claim 1, characterized in that: the size of the through-type stiffened plate and the connector is adjusted according to the expected stiffness of the joint .