CN104032835A - Stud connecting joint for connecting buckling-restrained steel plate wall with concrete frame - Google Patents

Abstract

The invention provides a stud connection node for connecting a buckling-constrained steel plate wall to a concrete frame, which includes a fishplate used to connect with the buckling-constrained steel plate wall, and a connecting plate connected to the beam or column of the concrete frame , the connecting plate is arranged parallel to the surface of the beam or column, and the connecting plate is vertically provided with pegs on the surface facing the beam or column, and the pegs extend into the inside of the beam or column, so The fishplate is vertically arranged on the surface of the connecting plate away from the beam or column. The present invention can be prefabricated in the factory without on-site fabrication during construction, and because only the studs extend into the beam or column, the stud connection node is convenient for the arrangement and binding of the longitudinal bars and stirrups of the beam or column.

Description

Stud connection joint between buckling-restrained steel plate wall and concrete frame

technical field

The invention belongs to the technical field of building structure node connections, in particular to a stud connection node for connecting a buckling-constrained steel plate wall and a concrete frame.

Background technique

Reinforced concrete frame structure is the most widely used structural form in building structures at present. For reinforced concrete structures with large volume and wide area, the traditional way to improve their lateral stiffness is to install reinforced concrete shear walls at appropriate parts of the structure. The concrete shear wall is mainly subjected to bending force, and the plastic hinge is concentrated at the bottom of the structure. The overall deformation capacity of the structure depends on the deformation capacity of the plastic hinge, which leads to the ductility and energy dissipation capacity of the concrete shear wall compared with the steel plate shear wall. Much worse.

The buckling-constrained steel plate wall is a good energy-dissipating member, which can greatly improve the bearing capacity and lateral stiffness of the frame structure, and has good ductility and energy-dissipating capacity, so it can greatly improve the seismic capacity of the structure. Therefore, it is of great significance to apply the buckling-constrained steel plate wall to the reinforced concrete structure, which can not only improve the mechanical performance of the structure, but also reduce the self-weight of the structure and save the cost of the foundation structure.

One of the key issues in the application of buckling-constrained steel plate walls to concrete structures is the connection between steel plate walls and concrete frames, which has not yet been well resolved.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a stud connection node for connecting the buckling-constrained steel plate wall and the concrete frame, which is used to solve the problem of connecting the concrete frame and the buckling-constrained steel plate wall in the prior art .

In order to achieve the above purpose and other related purposes, the present invention provides a stud connection node for connecting a buckling-constrained steel plate wall to a concrete frame, which includes a fishplate used to connect with the buckling-constrained steel plate wall, and used to connect with the buckling-constrained steel plate wall The connecting plate connected to the beam or column of the concrete frame, the connecting plate is arranged parallel to the surface of the beam or column, the surface of the connecting plate facing the beam or column is vertically provided with studs, and the pegs Extending into the inside of the beam or column, the fishplate is vertically arranged on the surface of the connecting plate away from the beam or column.

Preferably, when the height of the pegs is greater than half the height of the beam or column, the pegs on the connecting plates respectively arranged on the opposite surfaces of the same beams should be arranged in a misaligned manner in the length direction of the connecting plates.

Preferably, the eccentric distance between the centerline of the fishplate and the centerline of the connecting plate is half of the sum of the thickness of the fishplate and the thickness of the buckling-constrained steel plate wall.

Preferably, the fishplate is connected to the connecting plate through a full penetration groove butt weld.

Preferably, the connecting plate is placed outside the stirrups of the beam or column.

Preferably, the fishplate and the buckling-constrained steel plate wall are connected through fillet welds at both ends, or through full penetration groove butt welds, or through high-strength bolts.

As mentioned above, the stud connection joint between the buckling-constrained steel plate wall and the concrete frame of the present invention has the following beneficial effects: (1) the present invention solves the key problem of setting the buckling-constrained steel plate wall in the reinforced concrete frame structure, and can be easily realized For the connection between the buckling-constrained steel plate wall and the concrete frame, especially when the buckling-constrained steel plate wall is four-sided connection, the stud connection node of the present invention bears the best stress.

(2) The setting of the connection structure is convenient for the arrangement and binding of the steel bars in the beams and columns.

(3) The connection structure of the present invention enables clear force transmission between structures, good mechanical performance and convenient construction, and has broad application prospects.

Description of drawings

Fig. 1 shows a structural schematic diagram of a stud connection node in a beam connecting a buckling-constrained steel plate wall and a concrete frame according to the present invention.

Fig. 2 shows a front view of the stud joint of the present invention in a beam.

Fig. 3 shows a cross-sectional view of a stud connection node in a beam according to the present invention.

Figure 4 shows a front view of a stud connection joint of the present invention at a beam and column joint.

Component designation description

1 fish plate

2 connecting plate

3 studs

4 Beam stirrups

5 Beam longitudinal reinforcement

6 Post Stirrups

7 column longitudinal reinforcement

Detailed ways

The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

See Figures 1 through 4. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. within the scope covered by the disclosed technical content. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

As shown in Figures 1 to 4, the present invention provides a stud connection node for connecting a buckling-constrained steel plate wall to a concrete frame, which includes a fishplate 1 used to connect with the buckling-constrained steel plate wall, and a beam connected to the concrete frame or the connecting plate 2 connected to the column, the connecting plate 2 is arranged parallel to the surface of the beam or column, and the surface of the connecting plate 2 facing the beam or column is vertically provided with pegs 3, and the pegs 3 extend into the inside of the beam or column, and the fish tail The plate 1 is arranged vertically on the surface of the connecting plate 2 facing away from the beam or column. In the present invention, studs are inserted into the beam or column to connect with the concrete frame, and fishplates are used to connect with buckling-constrained steel plate walls. The connecting plates constitute the middle bridge of the entire structure. The stud connection nodes can be prefabricated in the factory. There is no need to make it on site during construction, and because only the studs extend into the beam or column, this stud connection node is convenient for the arrangement and binding of the longitudinal bars and stirrups of the beam or column.

As shown in Figure 1, the specific distribution diagram of the stud connection nodes in the beam, the connection structure composed of the above-mentioned fishplate 1, connection plate 2 and stud 3 is divided into two groups, which are respectively arranged on two opposite surfaces of the beam. To connect two buckling-constrained steel plate walls to a beam, that is, two connecting plates 2 are respectively arranged parallel to two opposite surfaces of the beam, and the connecting plates 2 are placed outside the beam stirrup 4 of the beam. The pegs 3 on the different connecting plates 2 in the two groups of connecting structures can be aligned in the length direction of the connecting plates, or arranged in a misplaced manner. The stud 3 is pre-connected to the connecting plate 2 by bolt welding. When the height of the stud 3 after welding is greater than half the height of the beam or column, the different connecting plates in the two groups of connecting structures (that is, the two opposite sides of the same beam are respectively The pegs 3 on the set connecting plate) should be misaligned in the length direction of the connecting plate.

The number of studs 3 in the present invention can be calculated according to the shear bearing capacity of a single stud and the shear force determined by the ultimate shear strength of the buckling-constrained steel plate wall within the range of unit length. If the above-mentioned buckling steel plate wall adopts ordinary steel plate wall, the effects of shear force and tension force should be considered at the same time when determining the bearing capacity of studs. The height of the stud 3 after welding should not be less than eight times the diameter of the stud itself. The distance between the studs 3 along the length of the connecting plate should not be less than five times the diameter of the studs themselves, the distance between the studs 3 along the transverse direction of the connecting plate should not be less than four times the diameter of the studs themselves, and the distance between the studs 3 and the edge of the connecting plate The distance is not less than 35mm. The width of the connecting plate 2 is determined by meeting the arrangement requirements of the studs, and the thickness of the connecting plate 2 is determined according to 2/3 of the diameter of the studs and in combination with the steel plate thickness specifications.

The eccentric distance between the centerline of the fishplate and the centerline of the connecting plate is half of the sum of the thickness of the fishplate and the thickness of the buckling-constrained steel plate wall, so that the centerline of the buckling-constrained steel plate wall coincides with the centerline of the stud connection node.

The above-mentioned fishplate 1 and connecting plate 2 are connected by a full penetration groove butt weld, which should be welded in the factory. The purpose of the fishplate 1 is to facilitate the on-site connection of the buckling-constrained steel plate wall and the above-mentioned connection structure, and at the same time increase the out-of-plane stiffness of the connection plate. In the present invention, the embedded steel plate wall (that is, the buckling-constrained steel plate wall) and the fishplate 1 can be connected by two fillet welds located at the end of the fishplate and the end of the buckling-constrained steel plate wall, or through a fully penetrated groove Butt welds are used for connection, and friction type high-strength bolts can also be used for connection. When fillet welds are used, the fillet welds at the end of the fishplate shall adopt unequal fillet welds to realize the transition of steel plates of different thicknesses. When using butt welds, the processing accuracy of the steel plate wall should be guaranteed, and all butt welds should meet the first-class quality requirements.

If a buckling-constrained steel plate wall is to be arranged in a reinforced concrete frame, it is first necessary to design the beams and columns through which the buckling-constrained steel plate wall directly transmits force, so that it can meet the requirements of bearing capacity and stiffness, and can be used as a four-sided connection buckling-constrained steel plate wall effective constraint components. At the same time, the thickness of the steel plate wall is determined according to the horizontal load shared by the buckling-constrained steel plate wall.

Before the construction of the concrete frame structure, the above-mentioned fishplate 1, connecting plate 2 and peg 3 are pre-processed in the factory and connected into a whole, wherein the outer surface of the connecting plate 2 is connected with the upper and lower surfaces of the beam or the inner and outer surfaces of the column respectively. The outer surface is flush, and the eccentric distance between the centerline of the fishplate and the centerline of the connecting plate is half of the sum of the thickness of the fishplate and the thickness of the embedded steel plate wall. The fishplate 1 and the connecting plate 2 are connected by a full penetration groove butt weld. The number of studs 3 is calculated according to the shear force determined by the ultimate shear strength of the buckling-constrained steel plate wall within the range of unit length.

During construction, the stud connection node of the present invention is integrally bound and pre-embedded in the concrete frame structure with steel bars in beams and columns where buckling-constrained steel plate walls need to be provided. After the concrete pouring is completed, the connection nodes of the buckling-constrained steel plate wall are completed. After the construction of the main concrete frame structure is completed, the embedded steel plate wall is connected to the fishplate 1 by using fillet welds, butt welds or friction-type high-strength bolts.

To sum up, the stud connection joints of the buckling-constrained steel plate wall and the concrete frame of the present invention use studs to extend into the beam or column to connect with the concrete frame, and use fishplates to connect with the buckling-constrained steel plate wall. The slab constitutes the middle bridge of the entire structure. This connection structure can be prefabricated in the factory without on-site fabrication during construction, and since only the studs extend into the interior of the beam or column, this connection structure is convenient for the longitudinal reinforcement of the beam or column and Arrangement and tying of stirrups. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (6)

1. the pin-connected joint that buckling-restrained steel plate wall is connected with concrete frame, it is characterized in that, comprise the splice bar (1) for being connected with described buckling-restrained steel plate wall, and be used for the junction plate (2) being connected with beam or the post of described concrete frame, described junction plate (2) be arranged in parallel with the surface of described beam or post, described junction plate (2) is vertically provided with peg (3) on the surface of described beam or post, described peg (3) stretches into the inside of described beam or post, described splice bar (1) is vertically set on described junction plate (2) to deviate from the surface of described beam or post.

2. the pin-connected joint that buckling-restrained steel plate wall according to claim 1 is connected with concrete frame, it is characterized in that: when the height of described peg (3) is greater than the half height of described beam or post, the peg (3) on the described junction plate arranging respectively on identical described beam opposite face is answered Heterogeneous Permutation on described junction plate (2) length direction.

3. the pin-connected joint that buckling-restrained steel plate wall according to claim 1 is connected with concrete frame, is characterized in that: the eccentric throw of described splice bar center line and described junction plate center line is the half of described splice bar thickness and buckling-restrained steel plate wall thickness sum.

4. the pin-connected joint that buckling-restrained steel plate wall according to claim 1 is connected with concrete frame, is characterized in that: described splice bar (1) is connected by the butt weld of full penetration groove with described junction plate (2).

5. the pin-connected joint that buckling-restrained steel plate wall according to claim 1 is connected with concrete frame, is characterized in that: described junction plate (2) is placed in the stirrup outside of described beam or post.

6. the pin-connected joint that buckling-restrained steel plate wall according to claim 1 is connected with concrete frame, it is characterized in that: described splice bar (1) is connected by the fillet weld of both ends with described buckling-restrained steel plate wall, or be connected by the butt weld of full penetration groove, or adopt high-strength bolt to be connected.