CN105064503A - Steel tube and core tube mixed structure - Google Patents

Abstract

The invention discloses a core tube hybrid structure, which comprises: steel columns, steel beams, two equilateral angle steels, two unequal angle steels, overhanging end plates, high-strength bolts and concrete. The core tube hybrid structure provided by the invention has the characteristics of large initial rigidity, high yield strength, plump hysteresis curve and good seismic performance.

Description

Steel tube core tube hybrid structure

technical field

The invention belongs to the technical field of structural engineering steel structures, and in particular relates to a steel pipe core tube hybrid structure.

Background technique

At present, the joint method between the steel concrete column (the inner steel pipe is steel pipe) and the steel concrete beam is as follows: the steel pipe in the steel pipe concrete column is provided with a ring plate at the upper flange of the steel beam, the steel beam flange in the steel beam is welded to the ring plate, and the steel bar in the steel beam Through section steel, partly bent around the steel pipe. The construction unit of this kind of joint form must open holes for the steel pipes to pass through the steel bars in the processing plant or on site. The opening of the steel pipe caused damage to the column section, and the construction period was long.

In the past engineering practice, it is common practice to weld studs on the steel pipe steel column, or directly weld the horizontal distribution reinforcement of the reinforced concrete wall to the steel pipe steel column. However, under the action of natural disasters such as earthquakes and hurricanes, the structure enters an elastic-plastic state or a plastic state. At this time, the interaction force between the steel pipe steel column and the reinforced steel beam is very large. It is difficult to ensure that the steel pipe steel column Cooperative work with steel beams, and once the connection between steel pipe steel columns and reinforced steel beams is damaged, the lateral stiffness, ductility and energy dissipation capacity of the structure will be significantly reduced, and even lead to the collapse of the entire structure. In addition, the steel bars in the steel beams in the traditional connection and the steel pipes in the steel pipe steel columns need to be welded on site. The welding quality is not suitable to be guaranteed, and the welding workload on site is large, which increases the difficulty and cost of construction.

Contents of the invention

In order to overcome the deficiencies in the prior art above, the present invention provides a hybrid steel pipe core tube structure with high initial rigidity, high yield strength, full hysteretic curve and good seismic performance.

The purpose of the present invention is achieved through the following technical solutions:

A core tube hybrid structure, including: including steel columns, steel beams, two equal-edge angle steels, two unequal-edge angle steels, overhanging end plates, high-strength bolts, and concrete, wherein:

The steel column is a steel pipe, including the upper flange, the lower flange and the web in the middle. There are several bolt holes on the upper and lower flanges of the steel column; the steel beam is H-shaped steel, and the upper and lower flanges at the proximal end of the steel beam are respectively opened There are a number of bolt holes; there are a number of bolt holes in the extended end plate; the two unequal angle steels are the top angle steel and the bottom angle steel respectively, and a number of bolt holes are opened on the side connecting the top angle steel and the bottom angle steel with the extended end plate, and are connected with the steel beam A number of bolt holes are opened on one side of the connection; the two equilateral angle steels include the left web angle steel and the right web angle steel, and a number of bolt holes are opened on both sides of the left web angle steel and the right web angle steel, and the concrete is poured in the steel pipe;

The horizontal plane of the top angle steel is connected with the upper flange of the steel beam through high-strength bolts, the vertical plane of the top angle steel is connected with the steel column through high-strength bolts passing through the overhanging end plate; the horizontal plane of the bottom angle steel is connected with the lower flange of the steel beam The vertical surface of the bottom angle steel is connected with the side of the steel column through friction high-strength bolts passing through the overhanging end plate; the first vertical surface of the left web angle steel and the second vertical surface of the right web angle steel One vertical plane sandwiches the web of the steel beam and is connected by friction-type high-strength bolts; the second vertical plane of the angle steel of the left web, the overhanging end plate and the side of the steel column are connected by friction-type high-strength bolts; the right web The second vertical surface of the angle steel, the overhanging end plate and the upper and lower flanges of the steel column are connected by friction-type high-strength bolts.

Preferably, the high-strength bolts are friction-type high-strength bolts.

Preferably, the high-strength bolts are single-sided bolts.

Compared with the prior art, the present invention has the following advantages:

1. Steel columns, steel beams and two equilateral angle steels are tightly fitted together, the openings are facing each other, connected by high-strength bolts, without any welding process, the steel will not be brittle, the initial rigidity is large, the yield strength is high, and the hysteresis The return curve is full and the anti-seismic performance is good.

2. The invention creatively combines steel pipe concrete columns, top and bottom angle steels, and full-bolt connection nodes. The friction-type high-strength bolt connection has high bearing capacity and good dynamic performance. The use of top and bottom angle steel-full bolt connection nodes improves the steel The ductility of the structural beam-column joints enhances the seismic energy dissipation capacity of the joints and further improves the overall seismic performance of the structure.

Description of drawings

Fig. 1 is a three-dimensional view of the connection node between the steel pipe concrete column and the steel concrete beam of the present invention.

Figure 2 is a longitudinal sectional view of Figure 1,

Figure 3 is a schematic diagram of the opening of the steel tube concrete column.

FIG. 4 is a transverse sectional view of FIG. 1 .

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

The steel pipe core tube hybrid structure shown in Figures 1 to 4 includes steel columns 1, steel beams 2, two equilateral angle steels 3, two unequal angle steels 4, overhanging end plates 5, high-strength bolts 6, Concrete 7, of which:

The steel column 1 is a steel pipe, and the flange of the steel column 1 has 8 bolt holes; the steel beam 2 is an H-shaped steel, including the upper and lower flanges and the web in the middle, and the upper and lower flanges at the proximal end of the steel beam 2 are respectively opened. There are 4 bolt holes; the overhanging end plate 5 has 8 bolt holes; the two unequal angle steels 4 are the top angle steel 41 and the bottom angle steel 42 respectively, and the top angle steel 41 and the bottom angle steel 42 are connected with the overhanging end plate 5 Two holes are opened on the side, and four holes are opened on the side connected to the steel beam 2; the two equilateral angle steels 3 include the left web angle steel 31 and the right web angle steel (covered by the steel beam in the figure), the left web angle steel 31 and the right web angle steel There are two bolt holes on both sides of the right web angle steel, and the concrete 7 is poured in the steel pipe.

The horizontal plane of the top angle steel 41 is connected to the upper flange of the steel beam 2 through friction-type high-strength bolts, and the vertical plane of the top angle steel 41 is connected to the steel column 1 through friction-type high-strength bolts passing through the overhanging end plate 5; the bottom angle steel The horizontal plane of 42 is connected with the lower flange of the steel beam 2 by friction-type high-strength bolts, and the vertical plane of the bottom angle steel 42 is connected with the side of steel column 1 by friction-type high-strength bolts passing through the overhanging end plate 5; the left web The first vertical surface of the angle steel 31 and the first vertical surface of the right web angle steel sandwich the web of the steel beam 2 and are connected by friction-type high-strength bolts. The end plate 5 is connected to the side of the steel column 1 through friction-type high-strength bolts, and the second vertical surface of the right web angle steel, the overhanging end plate 5 is connected to the flange of the steel column 1 through friction-type high-strength bolts.

In the scheme of this embodiment, the number of bolt holes is determined by mechanical calculation.

As a partial preferred solution of the above embodiments, the high-strength bolts are friction-type high-strength bolts.

As a partial preferred solution of the above embodiments, the high-strength bolts are single-sided bolts.

The processing and construction of this connection node are as follows:

(1) The steel column has transparent openings on both sides;

Both the upper and lower flanges of steel beams need to be opened;

Flush end plate opening;

Both faces of the 4 angle steels are perforated.

(2) First, the top angle steel and the bottom angle steel are connected with the upper and lower flanges of the steel beam through high-strength bolts;

(3) The left web angle steel and the right web angle steel are connected to the web of the steel beam through high-strength bolts;

(4) Left web angle steel, right web angle steel, top angle steel, bottom angle steel and flush end plate connection steel column.

During the connection and installation process of this connection node, pay attention to ensure that the holes are aligned, and pay attention to the initial and final screwing steps when installing high-strength bolts.

Claims (3)

1. A core tube mixing structure, characterized in that it comprises: Including steel columns, steel beams, two equal angles, two unequal angles, overhanging end plates, high-strength bolts, concrete, of which: The steel column is a steel pipe, including the upper flange, the lower flange and the web in the middle. There are several bolt holes on the upper and lower flanges of the steel column; the steel beam is H-shaped steel, and the upper and lower flanges at the proximal end of the steel beam are respectively opened There are a number of bolt holes; there are a number of bolt holes in the extended end plate; the two unequal angle steels are the top angle steel and the bottom angle steel respectively, and a number of bolt holes are opened on the side connecting the top angle steel and the bottom angle steel with the extended end plate, and are connected with the steel beam A number of bolt holes are opened on one side of the connection; the two equilateral angle steels include the left web angle steel and the right web angle steel, and a number of bolt holes are opened on both sides of the left web angle steel and the right web angle steel, and the concrete is poured in the steel pipe; The horizontal plane of the top angle steel is connected with the upper flange of the steel beam through high-strength bolts, the vertical plane of the top angle steel is connected with the steel column through high-strength bolts passing through the overhanging end plate; the horizontal plane of the bottom angle steel is connected with the lower flange of the steel beam The vertical surface of the bottom angle steel is connected with the side of the steel column through friction high-strength bolts passing through the overhanging end plate; the first vertical surface of the left web angle steel and the second vertical surface of the right web angle steel One vertical plane sandwiches the web of the steel beam and is connected by friction-type high-strength bolts; the second vertical plane of the angle steel of the left web, the overhanging end plate and the side of the steel column are connected by friction-type high-strength bolts; the right web The second vertical surface of the angle steel, the overhanging end plate and the upper and lower flanges of the steel column are connected by friction-type high-strength bolts. 2. The steel pipe core tube hybrid structure according to claim 1, characterized in that: The high-strength bolts are friction-type high-strength bolts. 3. The steel pipe core tube hybrid structure according to claim 1, characterized in that: The high-strength bolts are unilateral bolts.