Splicing joint of concrete filled steel tubular column

Abstract

The utility model provides a steel pipe concrete column splicing node which comprises an upper steel pipe, a lower steel pipe and a connecting assembly arranged between the upper steel pipe and the lower steel pipe, an inner cavity is arranged between the interior of the upper steel pipe and the interior of the lower steel pipe in a communicated mode, concrete is poured in the inner cavity, and the connecting assembly comprises an end plate and a connecting plate. A plurality of U-shaped grooves are symmetrically formed in the upper and lower ends of the connecting plate; a plurality of first studs are radially and inwards welded on the inner side wall of the upper steel pipe, and a plurality of second studs are radially and inwards welded on the inner side wall of the lower steel pipe; the first toggle pin penetrates through the U-shaped groove in the upper side of the connecting plate in a matched mode. The second stud penetrates through the U-shaped groove in the lower side of the connecting plate in a matched mode. The U-shaped grooves are used as positioning points, the upper steel pipe and the lower steel pipe are ensured to be coaxial through positioning installation of the first studs and the second studs, and meanwhile, an anti-shearing structure is formed through bonding connection of the studs and concrete, so that the overall anti-shearing capacity is improved, the integrity is enhanced, the anti-seismic performance is improved, the stability is enhanced, meanwhile, construction is convenient, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, and particularly relates to a splicing joint of a concrete-filled steel tube column. Background Art

[0002] At present, with the rapid development of large public buildings and medium and high-rise buildings, the requirements for building structures are getting higher and higher. Among them, the concrete-filled steel tube column restricts the internal concrete through the steel tube, which can effectively reduce the cross-sectional area while improving the overall bearing capacity, and has good bearing capacity and seismic performance, so it is widely used.

[0003] The splicing joints of traditional concrete-filled steel tube columns usually simply adopt welding, high-strength bolts, etc. for connection. The on-site construction is relatively cumbersome. When encountering large horizontal external forces, the shear resistance of the joints is weak, lacking a certain strength, and it is easy to be damaged.

[0004] In view of this, the applicant has specifically proposed this application after studying the existing technologies. Content of the Utility Model

[0005] The utility model provides a splicing joint of a concrete-filled steel tube column, aiming to improve at least one of the above technical problems.

[0006] To solve the above technical problems, the utility model provides a splicing joint of a concrete-filled steel tube column, which includes an upper steel tube, a lower steel tube, and a connecting component arranged between the upper steel tube and the lower steel tube. An inner cavity is communicated between the upper steel tube and the lower steel tube, and concrete is poured in the inner cavity. The connecting component is fixedly connected between the upper steel tube and the lower steel tube through the concrete; the connecting component includes an end plate and a connecting plate, and the connecting plate is coaxially and fixedly connected to the end plate; the upper end of the connecting plate axially extends into the upper steel tube, and the lower end axially extends into the lower steel tube. The upper and lower sides of the connecting plate are symmetrically arranged; a plurality of U-shaped grooves are symmetrically opened at the upper and lower ends of the connecting plate; a plurality of first stud bolts are radially and inwardly welded on the inner side wall of the upper steel tube, and a plurality of second stud bolts are radially and inwardly welded on the inner side wall of the lower steel tube; the first stud bolts are adapted to pass through the U-shaped grooves on the upper side of the connecting plate; the second stud bolts are adapted to pass through the U-shaped grooves on the lower side of the connecting plate.

[0007] As a further optimization, the cross-section of the connecting plate is in a loop shape, and the inner cavity is in a rectangular shape; a plurality of U-shaped grooves are spaced apart on all four sides of the connecting plate.

[0008] As a further optimization, a plurality of first stud bolts pass through the U-shaped grooves on the upper side of the connecting plate; a plurality of second stud bolts pass through the U-shaped grooves on the lower side of the connecting plate.

[0009] As a further optimization, the end plate is arranged in a loop shape and is clamped between the upper steel pipe and the lower steel pipe.

[0010] As a further optimization, a plurality of third stud bolts are symmetrically welded to the upper and lower sides of the end plate.

[0011] As a further optimization, a plurality of through holes are provided through the upper and lower ends of the end plate.

[0012] As a further optimization, the distance between the outer edge of the end plate and the connecting plate is 60 - 100 mm.

[0013] As a further optimization, the concrete is ultra-high performance concrete.

[0014] As a further optimization, a plurality of fourth stud bolts are welded on the inner side wall of the connecting plate.

[0015] By adopting the above technical solutions, the following technical effects can be achieved by the present utility model:

[0016] A steel tube concrete column splicing joint provided by the present application includes an upper steel tube, a lower steel tube, and a connecting component arranged between the upper steel tube and the lower steel tube. An inner cavity is communicated between the upper steel tube and the lower steel tube, and concrete is poured in the inner cavity. The connecting component includes an end plate and a connecting plate. A plurality of U-shaped grooves are symmetrically formed at the upper and lower ends of the connecting plate; a plurality of first stud bolts are radially welded inward on the inner side wall of the upper steel tube, and a plurality of second stud bolts are radially welded inward on the inner side wall of the lower steel tube; the first stud bolts are adapted to pass through the U-shaped grooves on the upper side of the connecting plate; the second stud bolts are adapted to pass through the U-shaped grooves on the lower side of the connecting plate. By using the U-shaped grooves as positioning points and positioning and installing through the first stud bolts and the second stud bolts, the upper and lower steel tubes are ensured to be coaxial. At the same time, through the bonding connection between the stud bolts and the concrete, a shear-resistant structure is formed, thereby improving the overall shear resistance, enhancing the integrity, improving the seismic performance, enhancing the stability, and at the same time facilitating construction and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a structural schematic diagram of a steel tube concrete column splicing joint of the present utility model;

[0019] Figure 2 is an exploded structural schematic diagram of a steel tube concrete column splicing joint of the present utility model;

[0020] Figure 3 is a schematic structural view of the connection component of the present utility model;

[0021] Markings in the figure: 1. upper steel pipe; 2. lower steel pipe; 3. connection component; 4. concrete; 5. end plate; 6. connecting plate; 7. U-shaped groove; 8. first stud; 9. second stud; 10. third stud; 11. fourth stud; 12. through hole. Specific embodiments

[0022] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0023] By Figures 1 to 3As shown in the figure, an embodiment of the utility model provides a splicing joint of a concrete-filled steel tube column, which includes an upper steel tube 1, a lower steel tube 2, and a connecting component 3 arranged between the upper steel tube 1 and the lower steel tube 2. An inner cavity is communicated between the upper steel tube 1 and the lower steel tube 2, and concrete 4 is poured in the inner cavity. The connecting component 3 is fixedly connected between the upper steel tube 1 and the lower steel tube 2 through the concrete 4. The connecting component 3 includes an end plate 5 and a connecting plate 6. The connecting plate 6 is coaxially and fixedly connected to the end plate 5. The end plate 5 is arranged in a loop shape and is clamped between the upper steel tube 1 and the lower steel tube 2. After pouring, it can be further strengthened by welding. The upper end of the connecting plate 6 axially extends into the upper steel tube 1, and the lower end axially extends into the lower steel tube 2. The upper and lower sides of the connecting plate 6 are symmetrically arranged. A plurality of U-shaped grooves 7 are symmetrically opened at the upper and lower ends of the connecting plate 6. A plurality of first stud bolts 8 are radially and inwardly welded on the inner side wall of the upper steel tube 1, and a plurality of second stud bolts 9 are radially and inwardly welded on the inner side wall of the lower steel tube 2. The first stud bolts 8 are adapted to pass through the U-shaped grooves 7 on the upper side of the connecting plate 6. The second stud bolts 9 are adapted to pass through the U-shaped grooves 7 on the lower side of the connecting plate 6. By arranging the connecting component 3 between the upper steel tube 1 and the lower steel tube 2 as a connecting node, the connection strength between the upper steel tube 1 and the lower steel tube 2 is enhanced. Among them, by arranging a plurality of U-shaped grooves 7 on the connecting plate 6, while changing its own flexibility and load-bearing capacity, it can be used as a positioning point. During installation and connection, through the corresponding insertion of each first stud bolt 8 and each second stud bolt 9 into each U-shaped groove 7, the function of positioning connection is realized, so that the upper steel tube 1 and the lower steel tube 2 are coaxially arranged, thereby ensuring the overall stability after the concrete 4 is poured. And further, the bonding effect between the first stud bolts 8 and the second stud bolts 9 and the concrete 4 is jointly strengthened. As shear-resistant members, the shear resistance at the connection node is improved.

[0024] As a preferred embodiment, the cross-section of the connecting plate 6 is arranged in a loop shape, and the inner cavity is vertically and communicatively penetrated. The inner cavity is arranged in a rectangle. In this embodiment, the upper steel tube 1 and the lower steel tube 2 are rectangular steel tubes, and the cross-section is square. A plurality of U-shaped grooves 7 are spaced on all four sides of the connecting plate 6. In this embodiment, three U-shaped grooves 7 are respectively arranged on the upper and lower sides of each side of the four sides of the connecting plate 6, and the three U-shaped grooves 7 are evenly spaced. In this way, when the U-shaped grooves 7 are appropriately opened, the toughness of the overall connecting plate can be improved while ensuring its own strength, thereby improving the overall load strength.

[0025] Further, according to the corresponding configuration, the U-shaped groove 7 on the upper side of the connecting plate 6 is provided with a plurality of first bolts 8 passing through; the U-shaped groove 7 on the lower side of the connecting plate 6 is provided with a plurality of second bolts 9 passing through. Among them, in this embodiment, the upper U-shaped groove 7 has two first bolts 8 passing through it, and the lower U-shaped groove 7 has two second bolts 9 passing through it. Similar shear structures can produce additional effects on each other when deformation occurs, and regional strength is improved, thereby strengthening the connection strength between the upper steel pipe 1, the lower steel pipe 2 and the connecting assembly 3 after pouring the concrete 4.

[0026] Preferably, multiple third bolts 10 are symmetrically welded on the upper and lower sides of the end plate 5 of the connection assembly 3. By providing the third bolts 10, the connection assembly 3 and the concrete 4 in the upper steel pipe 1 and the concrete 4 in the lower steel pipe 2 can be strengthened to further improve the shear resistance.

[0027] Preferably, a plurality of fourth bolts 11 are welded on the inner wall of the connecting plate 6. The fourth bolts 11 can further strengthen the connection between the connecting assembly 3 and the poured concrete 4, enhance the bonding strength, and improve the integrity.

[0028] Preferably, multiple through holes 12 are provided at the upper and lower ends of the end plate 5. By providing the through holes 12, it is convenient to allow the concrete 4 to flow to the lower part of the end plate 5 when pouring the concrete 4, and it is also convenient for the bubbles in the lower space of the end plate 5 to pass through the through holes 12 during vibration, thereby ensuring the uniformity of the concrete 4.

[0029] Preferably, the distance between the outer edge of the end plate 5 and the connecting plate 6 is 60-100 mm. It can be adjusted according to the actual steel tube thickness and bolt diameter of the steel tube concrete column 4. In this embodiment, the distance between the outer edge of the end plate 5 and the connecting plate 6 is 80 mm.

[0030] Preferably, the concrete 4 is ultra-high performance concrete 4 (UHPC), which has ultra-high durability and ultra-high mechanical properties to further ensure the overall structural strength.

[0031] Among them, the upper steel pipe 1, the lower steel pipe 2 and the connecting component 3 can all be prefabricated in the factory and installed on site. During installation, the lower steel pipe 2 is first fixed and then the concrete 4 is poured. A cavity is reserved 600mm away from the top of the lower steel pipe 2, and then the connecting component 3 is installed. The positioning and installation are carried out through the U-shaped groove 7 on the lower side corresponding to each second bolt 9, so that the connecting component 3 and the lower steel pipe 2 are guaranteed to be coaxial. Then, the upper steel pipe 1 is installed through the positioning between the upper U-shaped groove 7 and the first bolt 8. When the concrete 4 is poured to 600mm away from the bottom end of the upper steel pipe 1, vibration is completed first to make the node densely poured, and finally the remaining concrete 4 in the upper steel pipe 1 is poured.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A steel tube concrete column splicing node, characterized in that: It comprises an upper steel pipe, a lower steel pipe and a connecting assembly arranged between the upper steel pipe and the lower steel pipe, an inner cavity is connected between the interiors of the upper steel pipe and the lower steel pipe, concrete is poured in the inner cavity, and the connecting assembly is fixedly connected between the upper steel pipe and the lower steel pipe by the concrete; the connecting assembly comprises an end plate and a connecting plate, and the connecting plate is coaxially fixedly connected to the end plate; the upper end of the connecting plate extends axially into the upper steel pipe, and the lower end extends axially into the lower steel pipe, and the upper and lower sides of the connecting plate are symmetrically arranged; a plurality of U-shaped grooves are symmetrically provided at the upper and lower ends of the connecting plate; a plurality of first bolts are radially welded inwardly on the inner side wall of the upper steel pipe, and a plurality of second bolts are radially welded inwardly on the inner side wall of the lower steel pipe; the first bolt is adapted to pass through the U-shaped groove on the upper side of the connecting plate; the second bolt is adapted to pass through the U-shaped groove on the lower side of the connecting plate.

2. A steel tube concrete column splicing node according to claim 1, characterized in that The cross section of the connecting plate is in a circular shape, and the inner cavity is in a rectangular shape; a plurality of U-shaped grooves are arranged at intervals on the four sides of the connecting plate.

3. A steel tube concrete column splicing node according to claim 1, characterized in that The U-shaped grooves on the upper side of the connecting plate are each provided with a plurality of first bolts passing through; and the U-shaped grooves on the lower side of the connecting plate are each provided with a plurality of second bolts passing through.

4. A steel tube concrete column splicing node according to claim 1, characterized in that The end plate is arranged in a circular shape, and the end plate is clamped between the upper steel pipe and the lower steel pipe.

5. A steel tube concrete column splicing node according to claim 1, characterized in that A plurality of third bolts are symmetrically welded on the upper and lower sides of the end plate.

6. A steel tube concrete column splicing node according to claim 1, characterized in that , a plurality of through holes are provided through the upper and lower ends of the end plate.

7. A steel tube concrete column splicing node according to claim 1, characterized in that , the distance between the outer edge of the end plate and the connecting plate is 60-100mm.

8. A steel tube concrete column splicing node according to claim 1, characterized in that , the concrete is ultra-high performance concrete.

9. A steel tube concrete column splicing node according to claim 1, characterized in that A plurality of fourth bolts are welded on the inner wall of the connecting plate.

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