CN204715533U - The linkage of not contour girder steel - Google Patents

Abstract

The utility model relates to a connection device for steel beams with unequal heights, which comprises a flange plate, a straight connection plate, an oblique connection plate and a beam-armor connection system. Both the sides of the deep beam and the shallow beam are welded and reinforced; on the vertical column between the deep beam and the shallow beam, the upper part is reinforced with a straight connection plate, the lower part is reinforced with an oblique connection plate, or the lower part is directly connected The slab and the beam haunch connection system between the outer side and the shallow beam are jointly reinforced; each reinforced slab is chamfered at the contact point with the beam to increase the contact area. By adding welded flange plates on the beams, the shear strain value of the steel frame with unequal height steel beams is reduced, and the torsional performance is greatly improved, which is beneficial to improve the seismic performance of the steel frame with unequal height steel beams .

Description

Connection device for unequal height steel beams

technical field

The utility model relates to a connection device for steel beams of unequal heights, which is used to reinforce the joints of steel frames with steel beams of unequal heights, and is composed of a series of plate layouts, including flange plates, straight connection plates, oblique connections Slab and beam haunch connection system for connecting shallow and deep beams to columns. It belongs to the field of architectural structure design and construction of civil engineering.

Background technique

In recent years, steel frames with steel beams of unequal heights have been widely used in lateral force-resistant systems of steel structures due to their superior toughness and energy dissipation capabilities. The welded connections of SMRFs were severely damaged in the earthquake, which led to the investigation of the cause of the fracture, which was found to occur at the bottom of the beam and the weld between the columns, and various reinforcements were carried out.

However, the current common reinforcement measures still have certain deficiencies: they are only limited to enhancing the role of welding, as well as improving the geometry and material properties of the connection.

Therefore, improving on the existing reinforcement measures, a series of plate arrangements including flange plate, straight connection plate, oblique connection plate and beam haunch connection system are used to connect the shallow and deep beams to the columns. It can effectively reduce the shear strain value and greatly improve the torsional performance, which is of great significance for the shock absorption control of actual engineering.

Utility model content

In order to solve the problem of limited ability of traditional reinforcement measures for steel frames with unequal height steel beams, the purpose of this utility model is to propose a special moment-resistant connection for unequal height steel beams. The device consists of a series of Composed of plate arrangements, including flange plates, straight connection plates, inclined connection plates and beam haunch connection systems, to connect shallow and deep beams to columns. The shear strain value of the steel frame with unequal-height steel beams is reduced, and the torsional performance is greatly improved, which is beneficial to improving the seismic performance of the steel frame with unequal-height steel beams.

In order to achieve the above object, the utility model adopts the following technical solutions.

The connecting device for unequal height steel beams proposed by the utility model includes a flange plate 1, a straight connecting plate 2, an oblique connecting plate 3 and a beam-axillary connecting system 4, wherein:

For steel frames with steel beams of unequal height, flange plates 1 are welded at the place where the side of the deep beam or shallow beam contacts the vertical column; the flange plate 1 is welded to the side end of the deep beam or shallow beam On the outside of the flange, it needs to be arranged on the deep beam or on the shallow beam, which is used to strengthen the connection weld between the side of the deep beam or the shallow beam and the vertical column; the flange plate needs to be arranged on the deep beam or on the shallow beam , can greatly increase the torsional performance at the node and increase the maximum shear strain value;

For vertical columns between deep beams and shallow beams, the upper part between adjacent vertical columns is reinforced by welding with straight connection plate 2, and the lower part is reinforced by welding with oblique connection plate 3, or the joint reinforcement of straight connection plate 2 and beam haunch connection system 4 .

In the utility model, the flange plate 1, the straight connecting plate 2, the inclined connecting plate 3 and the beam-axillary connecting system 4 have outer chamfers at the contact surfaces of the deep beam or the shallow beam side to increase the contact area and improve the welding quality.

Compared with prior art, the utility model has the following advantages:

1) Experiments and analysis show that the reinforcement effect of the flange plate is very significant. The final ductility performance of the design is that after the strength degrades by 20%, the total interlayer displacement angle is 0.06 radians, which is much better than the traditional without flange. Board reinforcement measures.

2) The utility model overcomes the shortcomings of traditional reinforcement measures by adopting a series of plate layouts with flange plates to reinforce and connect shallow beams and deep beams to columns. The shear strain value of the steel frame with unequal-height steel beams is reduced, and the torsional performance is greatly improved, which is beneficial to improving the seismic performance of the steel frame with unequal-height steel beams.

3) The structural form of the reinforced node unit of the utility model is simple, and different combination methods can be set according to the characteristics of the basic structure, so that the welding of the connecting plate is more convenient, so as to achieve a better shock absorption effect.

Description of drawings

Fig. 1 is the connecting device one of the utility model unequal height steel beam;

Fig. 2 is the connection device two of the utility model unequal height steel beam;

Numbers in the figure: 1 is the flange plate, 2 is the straight connection plate, 3 is the oblique connection plate, and 4 is the beam and haunch connection system.

Detailed ways

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment 1: As shown in FIG. 1 , it is an embodiment of a connection device for unequal height steel beams of the present invention, which mainly includes a flange plate 1 , a straight connection plate 2 , and an oblique connection plate 3 .

For the steel frame with steel beams of unequal height, the flange plate 1 is welded at the place where the side of the deep beam and the shallow beam contact the vertical column; in the vertical column between the deep beam and the shallow beam, the upper part is directly connected Plate 2 is welded and strengthened, and the lower part is welded and reinforced with inclined connecting plate 3. The flange plate 1, the straight connecting plate 2, the inclined connecting plate 3 and the beam contact surfaces all have outer chamfers to increase the contact area and improve the welding quality.

Embodiment 2: As shown in FIG. 2 , it is an embodiment of a connection device for unequal height steel beams of the present invention, which mainly includes a flange plate 1 , a straight connection plate 2 , and a girder haunch connection system 4 .

For the steel frame with steel beams of unequal height, the flange plate 1 is welded at the place where the side of the deep beam and the shallow beam contact the vertical column; in the vertical column between the deep beam and the shallow beam, the upper part is directly connected The plate 2 is welded and reinforced, and the lower part is reinforced with a straight connection plate 2 and a beam haunch connection system 4 between the outer side and the shallow beam. The flange plate 1, the straight connecting plate 2 and the beam-axillary connecting system 4 all have outer chamfers on the contact surface with the beam to increase the contact area and improve the welding quality.

Claims (2)

1. a linkage for not contour girder steel, comprises frange plate (1), direct-connected fishplate bar (2), inclined connection plate (3) and haunch connected system (4), it is characterized in that:

For the steel frame with not contour girder steel, be all welded with frange plate (1) in the place that deep beam or shallow beam side contact with mullion; Described frange plate (1) is welded in outside the edge of a wing of deep beam or shallow beam side end, for reinforcing the attachment weld place of deep beam or shallow beam side and mullion;

For the mullion between deep beam and shallow beam, between adjacent mullion, top adopts direct-connected fishplate bar (2) reinforcement of weld, and bottom adopts inclined connection plate (3) reinforcement of weld, or adopts direct-connected fishplate bar (2) and haunch connected system (4) jointly to reinforce.

2. the linkage of a kind of not contour girder steel according to claim 1, is characterized in that: described frange plate (1), direct-connected fishplate bar (2), inclined connection plate (3) and haunch connected system (4) all have the chamfering in outside with deep beam or shallow beam contacts side surfaces face place.