CN105064512A - Connecting structure of circular steel tube concrete column and steel beam - Google Patents

Abstract

The invention discloses a connection structure between a circular steel pipe concrete column and a steel beam, which comprises a steel column, a steel beam, two equilateral angle steels, two unequal angle steels, a single-side bolt, an inner sleeve and concrete. The connection structure between the circular steel pipe concrete column and the steel beam provided by the invention has high initial rigidity, high yield strength, full hysteresis curve and good seismic performance.

Description

The Connection Structure of Circular Concrete Steel Tube Columns and Steel Beams

technical field

The invention belongs to the technical field of structural engineering steel structures, and in particular relates to a connection structure between a circular steel pipe concrete column and a steel beam.

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 round steel pipe steel column, or directly weld the horizontally distributed steel bars of the reinforced concrete wall to the round 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 round steel column and the steel beam is very large. The steel columns and steel beams work together, and once the connection between the circular steel pipe steel columns and the 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 round steel pipes and steel columns need to be welded on site. The welding quality is not guaranteed, and the on-site welding workload is heavy, 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 connection structure between a circular steel tube concrete column and a steel beam 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:

The connection structure between circular steel pipe concrete columns and steel beams, including: steel columns, steel beams, two equal-edge angle steels, two unequal-edge angle steels, single-side bolts, inner sleeves and concrete, of which:

The steel column is a round steel tube, and the steel column body of the round steel tube shape has a number of bolt holes; the steel beam is an H-shaped steel, including the upper flange, the lower flange and the web in the middle, and the upper and lower flanges. There are a number of bolt holes at each end; the inner sleeve is located in the steel column and has a number of bolt holes; the two unequal angle steels are the top angle steel and the bottom angle steel respectively, and the sides connecting the top angle steel and the bottom angle steel with the steel column are respectively opened. A number of bolt holes are respectively opened on the side connected with the steel beam; the two equilateral angle steels are the left web angle steel and the right web angle steel respectively, and the two sides of the left web angle steel and the right web angle steel are respectively opened with a number of bolt holes;

The horizontal plane of the top angle steel is connected with the upper flange of the steel beam by unilateral bolts, and the horizontal plane of the bottom angle steel is connected with the lower flange of the steel beam by unilateral bolts; the first vertical plane of the left web angle steel and the right web angle steel The first vertical plane clamps the web plate of the steel beam and is connected by a single-sided bolt; the vertical plane of the top angle steel is connected with the steel column by a single-side bolt, and the vertical plane of the bottom angle steel and the inner sleeve are connected by a steel column Unilateral bolt connection; the second vertical surface of the left web angle steel is connected with the inner sleeve through a single side bolt passing through the steel column, and the second vertical surface of the right web angle steel is connected with the steel column through a single side bolt; concrete Pouring in round steel tubes.

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

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

1. The round steel pipe steel columns, steel beams and two equal-sided angle steels are closely fitted together. The holes are facing each other. They are connected by unilateral bolts without any welding process. The steel is not brittle, with high initial rigidity and high yield strength. , full hysteresis curve, good seismic performance.

2. The present invention creatively combines circular steel tube concrete columns, top and bottom angle steels, and full-bolt connection nodes. The unilateral bolt connection has high bearing capacity and good dynamic performance. The top and bottom angle steel-full-bolt connection nodes are used to improve the steel structure. The ductility of the 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 connection nodes between a circular steel pipe concrete column and a steel concrete beam of the present invention.

Figure 2 is a longitudinal sectional view of Figure 1,

FIG. 3 is a top view of FIG. 1 .

Detailed ways

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

The connection structure between circular steel pipe concrete columns and steel beams as shown in Figures 1 to 3, including circular steel pipe steel columns 1, steel beams 2, two equal-edge angle steels 3, two unequal-edge angle steels 4, and unilateral bolts 5 , inner sleeve 6 and concrete 7, wherein:

The steel column 1 is a round steel pipe, and the round 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 two flanges of the steel beam 2 There are 4 bolt holes at the proximal end of each; the inner sleeve 6 is located in the steel column 1 and has 8 bolt holes; the two unequal angle steels 4 are respectively the top angle steel 41 and the bottom angle steel 42, and the top angle steel 41 and the bottom angle steel Two holes are respectively opened on the side connecting the angle steel 42 to the steel column 1, and four holes are respectively opened on the side connecting to the steel beam 2; the two equilateral angle steels 3 are respectively the left web angle steel 31 and the right web angle steel (Fig. The center is blocked by the steel beam), and there are two bolt holes on the two faces of the left web angle steel 31 and the right web angle steel.

The horizontal plane of the top angle steel 41 is connected with the upper flange of the steel beam 2 by a single-sided bolt, and the horizontal plane of the bottom angle steel 42 is connected with the lower flange of the steel beam 2 by a single-sided bolt; the first vertical plane of the left web angle steel 31 and The first vertical surface of the right web angle steel sandwiches the web of the steel beam 2 and is connected by a single-sided bolt; the vertical surface of the top angle steel 41 is connected with the steel column 1 by a single-sided bolt, and the vertical surface of the bottom angle steel 42 is connected with the steel column 1 by a single-sided bolt. The inner sleeve 6 is connected through the unilateral bolt passing through the steel column 1; the second vertical surface of the left web angle steel 31 is connected with the inner sleeve 6 through the unilateral bolt passing through the steel column 1, and the second vertical surface of the right web angle steel The two vertical surfaces are connected to the steel column 1 by unilateral bolts. Concrete 7 is poured in the circular steel pipe.

In the above embodiments, the number of bolt holes is determined by mechanical calculation.

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

(3) The left web angle steel and the right web angle steel are connected to the web of the steel beam through unilateral 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 screwing and final screwing steps when installing single-sided bolts.

Claims (2)

1. the syndeton of concrete-filled circular steel tube column and girder steel, is characterized in that comprising:

Steel column, girder steel, two equal leg angles, two unequal angles, monolateral bolt, inner sleeve and concrete, wherein:

Steel column is round steel pipe, and the tubular steel column cylinder of round steel has some bolts hole; Girder steel is H profile steel, comprise top flange, bottom flange and be positioned at middle part web, the near-end of top flange, bottom flange respectively has some bolts hole; Inner sleeve is arranged in steel column and has some bolts hole; Two unequal angles are respectively top angle steel and bottom angle steel, and the side that top angle steel and bottom angle steel are connected with steel column opens some bolts hole respectively, and the side be connected with girder steel opens some bolts hole respectively; Two equal leg angles are respectively left web-angle and right web-angle, and two faces of left web-angle and right web-angle all have some bolts hole;

The horizontal plane of top angle steel is connected by monolateral bolt with the top flange of girder steel, and the horizontal plane of bottom angle steel is connected by monolateral bolt with the bottom flange of girder steel; First vertical plane of left web-angle is clipped the web of girder steel with the first vertical plane of right web-angle and is connected by monolateral bolt; The vertical plane of top angle steel is connected by monolateral bolt with steel column, and the vertical plane of bottom angle steel is connected by the monolateral bolt through steel column with inner sleeve; Second vertical plane of left web-angle is connected by the monolateral bolt through steel column with inner sleeve, and the second vertical plane of right web-angle is connected by monolateral bolt with steel column;

Concreting is in round steel pipe.

2. the syndeton of concrete-filled circular steel tube column according to claim 1 and girder steel, is characterized in that: described monolateral bolt is friction type high strength bolt.