CN203701298U - T-shaped plane buckling-resisting tubular joint of rectangular steel tube structure - Google Patents

Abstract

The utility model discloses a T-shaped plane anti-buckling intersecting node of a rectangular steel pipe structure, which comprises a main pipe and a branch pipe, the branch pipe is vertically arranged on the main pipe, and a reinforced angle steel is arranged at the joint between the branch pipe and the main pipe; the first lining pipe and the second lining pipe One end of the main pipe is respectively inserted into the main pipe, and the outer surfaces of the first liner and the second liner are in close contact with the inner surface of the main pipe. A grouting hole is opened, a second sealing plate is arranged at one end of the second liner inside the main pipe, and a vent hole is opened in the middle of the second sealing plate, and concrete is poured in the main pipe through the grouting hole. The utility model increases the bearing capacity of the joint by using reinforced angle steel at the joint, performs local grouting on the main pipe through the grouting hole and the exhaust hole, and relieves the sudden change in stiffness and stress concentration of the main pipe at the mouth of the pipe through the liner, effectively limiting local buckling of the main tube at the nodes.

Description

T-shaped planar buckling-resistant intersecting joints of a rectangular steel pipe structure

technical field

The utility model relates to an intersecting node, in particular to a T-shaped plane anti-buckling intersecting node of a rectangular steel pipe structure.

Background technique

In the past two decades, the steel pipe structure has developed rapidly in China. Because of its light weight, convenient construction, and the symmetry of the pipe section is conducive to the stability design of a single member, it is widely used in gymnasiums, terminal buildings, exhibition halls, and office buildings. At the same time, with the development of computer numerical control processing technology, intersecting joints have become one of the more commonly used joint forms in steel pipe structures due to their advantages of simple connection, convenient processing, beautiful appearance and steel saving; pure steel pipe intersecting joints are When the internal force of the branch pipe is large, or when there are many branch pipes at the node, the stress concentration of the node is serious, the stress situation is complicated, and local buckling and large deformation are prone to occur on the main pipe wall, which may easily cause the node to be damaged before the component, and the good performance of the steel pipe cannot be fully utilized. load-bearing performance, thereby reducing the overall load-carrying capacity of the steel pipe structure; for this reason, domestic and foreign scholars have also proposed some solutions.

T-shaped steel pipe intersecting joint is one of the commonly used joint types in steel frame and steel truss structures. Through joints, in order to improve the bearing capacity of joints and avoid joint damage before components, the following strengthening methods are usually adopted:

(1) Set stiffeners in the main pipe. Although this method can strengthen the pipe joints to a certain extent and relieve the stress concentration in the joint area, it is an effective reinforcement scheme in theoretical analysis, but considering the needs of actual engineering, such a method In the actual construction process, the process is complicated and the operation is inconvenient, especially for the stiffeners in the finished steel pipe, the pipe wall needs to be grooved, the process requirements are high, and the processing cost is high.

(2) Reinforced with a ring plate. This method sets ring plate reinforcement in the heat-affected zone of the weld seam of the main pipe along the intersecting line of the main pipe to enhance the strength and stiffness of the main pipe at the welded part, which can not only improve the static strength of the joint, but also increase the strength of the joint before failure. Shapeshifting ability. This reinforcement method transfers the damage of unreinforced joints around the weld to the damage around the ring plate outside the heat-affected zone of the weld, changing the failure mode of the node, but this method will make the structure in the ring plate The stiffness of the edge changes suddenly, resulting in stress concentration, which is not conducive to the stability of the structure.

(3) Board connection. The essence of this method is to set a gusset plate at the node connection, slot the steel pipe section, and insert the connection plate into the pre-grooved slot for welding; the node processing is complicated, the construction welding volume is large, and the insert plate and the steel pipe section are easily sheared Hysteresis and local buckling phenomena.

(4) Concrete is poured as a whole in the main pipe. This method is to pour concrete into the main pipe. After the concrete is set, it can provide good compressive bearing capacity and provide lateral constraints on the pipe wall, which can largely limit the buckling deformation of the main pipe at the pipe joints and increase the joint bearing capacity. Greatly improve. However, this reinforcement method of integrally pouring concrete increases the self-weight of the structure to a large extent, increases the design load of the structure, prolongs the construction period, and causes unnecessary waste of materials.

The traditional reinforcement method improves the bearing capacity of T-shaped steel pipe intersecting joints to a certain extent, but there are more or less corresponding problems; therefore, aiming at the rectangular steel pipe structure commonly used in engineering, through research and analysis , improve the reinforcement method, and propose a new T-shaped planar buckling-resistant intersecting joint of rectangular steel pipe structure.

Utility model content

The technical problem to be solved by the utility model is to provide a T-shaped plane anti-buckling intersecting node of a rectangular steel pipe structure, which is simple in structure, reasonable in design, easy to implement, easy to use and operate, and Angle steel strengthens the tensile and flexural bearing capacity of the joints. The liner can not only extend the main pipe, but also increase the bearing capacity at the nozzle of the main pipe. By pouring concrete locally on the main pipe, it can not only increase the bearing capacity of the joints, but also avoid Due to the increased weight of the overall grouting, the supervisor has high working stability, long service life, strong practicability, good use effect, and is convenient for popularization and use.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a T-shaped plane anti-buckling intersecting node of a rectangular steel pipe structure, which is characterized in that it includes a main pipe and a branch pipe, and the branch pipe is vertically arranged on the main pipe. Reinforced angle steel is provided at the connection between the branch pipe and the main pipe; one end of the first liner and the second liner are respectively inserted into the inside of the main pipe, and the outer surfaces of the first liner and the second liner are both connected to the main pipe. The inner surface of the first liner is in close contact with the inner surface of the main pipe, and a first sealing plate is provided at one end of the main pipe, and a grouting hole is opened in the middle of the first sealing plate, and the second liner is located in the main pipe A second sealing plate is arranged at one end, and a vent hole is opened in the middle of the second sealing plate, and concrete is poured in the main pipe through the grouting hole; the first sealing plate and the second sealing plate are respectively located in the On the outside of the pipe wall where the branch pipe is arranged axially along the main pipe, the distance between the first sealing plate and the pipe wall of the branch pipe is equal to the distance between the second sealing plate and the pipe wall of the branch pipe, and the pouring length of the concrete It is equal to the distance between the first sealing plate and the second sealing plate.

The above-mentioned T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure is characterized in that: the diameter of the grouting hole is 40 mm, and the diameter of the vent hole is 20 mm.

The above-mentioned T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure is characterized in that: the concrete is micro-expansive fine stone concrete of C30 strength.

The above-mentioned T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure is characterized in that: the distance between the first sealing plate and the corresponding side of the branch pipe is between 200 mm and 500 mm.

The above-mentioned T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure is characterized in that: the main pipe, the branch pipe, the first liner and the second liner are all rectangular steel pipes.

The above-mentioned T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure is characterized in that: the branch pipe is connected to the main pipe through a butt weld, and the main pipe, the first liner and the second liner both pass through the point Weld seam connection, the reinforcement angle steel is connected with the main pipe and branch pipe through fillet seam.

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

1. The structure of the utility model has beautiful appearance, reasonable design, convenient construction and easy realization.

2. The utility model strengthens the tensile and bending bearing capacity of the joint between the main pipe and the branch pipe through reinforced angle steel, the reinforcement effect is obvious and the construction is convenient.

3. The utility model uses micro-expansion concrete to locally grout the main pipe at the joints, which can not only avoid the increase in the weight of the main pipe due to the overall grouting, avoid setting stiffeners or inserting plate connections, and other forms of joints, but also through the micro-expansion of concrete. The area between the two sealing plates is filled to provide lateral restraint for the inner wall of the main pipe at the joint, which effectively limits the local buckling of the main pipe at the joint, increases the bearing capacity of the joint, reduces the project cost and shortens the construction period.

4. The utility model can not only extend the main pipe through the liner, but also form a transition zone between the inner grouting area of the main pipe and the non-grouting area at the mouth of the main pipe, increase the bearing capacity at the mouth of the main pipe, and greatly relieve the rigidity of the main pipe The sudden change problem and the stress concentration problem.

5. The utility model makes grouting inside the main pipe convenient and high in construction quality through the grouting holes and vent holes on the sealing plate.

6. The utility model has direct and clear force transmission, strong practicability, good use effect, and is convenient for popularization and use.

In summary, the utility model has a beautiful appearance, direct and clear force transmission, increases the bearing capacity of the nodes by using reinforced angle steel at the nodes, and partially grouts the positions of the main pipe nodes through the grouting holes and exhaust holes on the sealing plate, and The liner relieves the sudden change in stiffness and stress concentration of the main pipe at the nozzle, effectively restricts the local buckling of the main pipe at the node, enhances the bearing capacity of the main pipe, lowers the project cost and shortens the construction period, and has a long service life of the structure. Strong, good use effect, easy to popularize and use.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a top view of the utility model.

FIG. 3 is a cross-sectional view along line A-A of FIG. 2 .

Explanation of reference signs:

1-main pipe; 2-branch pipe; 3-1-first liner;

3-2- second liner; 4- reinforced angle steel; 5- grouting hole;

6-air vent; 7-concrete; 8-1-the first sealing plate;

8-2-Second sealing board.

Detailed ways

As shown in Figure 1, Figure 2 and Figure 3, the utility model includes a main pipe 1 and a branch pipe 2, and the branch pipe 2 is vertically fixed on the main pipe 1 through a butt weld, and is fixed on the main pipe 1 through a fillet weld using a reinforced angle steel 4. The connection between the branch pipe 2 and the main pipe 1 further enhances the tensile and bending resistance of the node; one end of the first liner 3-1 and the second liner 3-2 are respectively inserted into the inside of the main pipe 1, and the The outer surfaces of the first liner 3-1 and the second liner 3-2 are in close contact with the inner surface of the main pipe 1, and the ports of the main pipe 1 are respectively connected to the first liner 3-1 by spot welding. Connected with the second liner 3-2, the first liner 3-1 and the second liner 3-2 not only extend the length of the main pipe 1, make the main pipe 1 easy to connect, but also make the inner grouting area of the main pipe 1 and the mouth of the nozzle A transition area is formed between the grouting areas, which increases the bearing capacity at the nozzle of the main pipe 1 and alleviates the problem of sudden change in stiffness and stress concentration of the main pipe 1; A sealing plate 8-1, the second liner 3-2 is located at one end of the main pipe 1 and a second sealing plate 8-2 is provided, the first sealing plate 8-1 and the second sealing plate 8-2 are respectively Located outside the pipe wall of the branch pipe 2 axially arranged along the main pipe 1, the distance between the first sealing plate 8-1 and the pipe wall of the branch pipe 2 and the distance between the second sealing plate 8-2 and the pipe wall of the branch pipe 2 The distance between the walls is equal, and the distance is between 200mm and 500mm; a grouting hole 5 with a diameter of 40mm is opened at the middle position of the first sealing plate 8-1, and the There is an exhaust hole 6 with a diameter of 20mm at the middle position, through the grouting hole 5, the micro-expanded fine stone concrete 7 with a strength of C30 is poured inside the main pipe 1, and the pouring length of the concrete 7 is the same as that of the first sealing plate The distance between 8-1 and the second sealing plate 8-2 is equal, and the main pipe 1 is filled in the area between the first sealing plate 8-1 and the second sealing plate 8-2 through the micro-expansion of the concrete 7 It provides lateral constraints for the inner wall of the main pipe at the node, which effectively limits the local buckling of the main pipe 1 at the node, increases the bearing capacity of the main pipe 1 and lowers the construction cost.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , in this embodiment, the main pipe 1 , the branch pipe 2 , the first liner 3 - 1 and the second liner 3 - 2 are all rectangular steel pipes.

The processing process of the utility model is as follows: weld the branch pipe 2 on the main pipe 1 to form a T-shaped steel pipe structure, fix and reinforce the angle steel 4 at the node of the main pipe 1 and the branch pipe 2 through fillet welds; calculate the first lining according to the specific needs of the project Insert the tube 3-1 and the second liner 3-2 into the main pipe 1 at the best position, and insert one end of the first liner 3-1 and the second liner 3-2 into the main pipe 1 respectively, so that the first liner The pipe 3-1 and the second liner 3-2 are in this optimal position, and the first liner 3-1 and the second liner 3-2 are fixed by spot welding; from the first sealing plate 8-1 The grouting hole 5 pours concrete 7 inside the main pipe 1 to strengthen the anti-buckling ability of the main pipe 1 at the node.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (6)

1. A T-shaped planar buckling-resistant intersecting node of a rectangular steel pipe structure, characterized in that: it includes a main pipe (1) and a branch pipe (2), and the branch pipe (2) is vertically arranged on the main pipe (1). The central axis of the branch pipe (2) is on the same plane as the central axis of the main pipe (1), and a reinforced angle steel (4) is provided at the connection between the branch pipe (2) and the main pipe (1); the first liner (3-1 ) and one end of the second liner (3-2) are respectively inserted into the main pipe (1), and the outer surfaces of the first liner (3-1) and the second liner (3-2) are consistent with the The inner surface of the main pipe (1) is in close contact, and the first liner (3-1) is provided with a first sealing plate (8-1) at one end of the main pipe (1), and the first sealing plate (8 -1) There is a grouting hole (5) at the middle position, the second liner (3-2) is located in the main pipe (1) and one end is provided with a second sealing plate (8-2), the second There is a vent hole (6) in the middle of the sealing plate (8-2), and concrete (7) is poured in the main pipe (1) through the grouting hole (5); the first sealing plate (8- 1) and the second sealing plate (8-2) are respectively located on the outside of the pipe wall of the branch pipe (2) arranged axially along the main pipe (1), the first sealing plate (8-1) and the branch pipe (2) ) and the distance between the second sealing plate (8-2) and the pipe wall of the branch pipe (2) are equal, and the pouring length of the concrete (7) is the same as that of the first sealing plate (8 -1) and the distance between the second sealing plate (8-2) is equal. 2. The T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure according to claim 1, characterized in that: the diameter of the grouting hole (5) is 40 mm, and the diameter of the vent hole (6) is 40 mm. 20mm. 3. The T-shaped plane buckling-resistant intersecting joint of a rectangular steel pipe structure according to claim 1, characterized in that: the concrete (7) is C30-strength micro-expansive fine stone concrete. 4. The T-shaped plane buckling-resistant intersecting joint of a rectangular steel pipe structure according to claim 1, characterized in that: between the first sealing plate (8-1) and the pipe wall of the branch pipe (2) The distance is between 200mm and 500mm. 5. The T-shaped planar buckling-resistant intersecting joint of a rectangular steel pipe structure according to claim 1, characterized in that: said main pipe (1), branch pipe (2), first liner pipe (3-1) and The second liner (3-2) is a rectangular steel pipe. 6. The T-shaped plane buckling-resistant intersecting joint of a rectangular steel pipe structure according to claim 1, characterized in that: the branch pipe (2) is connected to the main pipe (1) through a butt weld, and the main pipe (1) It is connected with the first liner (3-1) and the second liner (3-2) by spot welding, and the reinforcement angle steel (4) is connected with the main pipe (1) and the branch pipe (2). Connected by fillet welds.