Splicing joint of concrete-filled steel tube composite column and reinforced concrete column and construction method

Abstract

The invention provides a splicing joint of a concrete-filled steel tube composite column and a reinforced concrete column and a construction method. The splicing joint comprises the concrete-filled steel tube composite column, the reinforced concrete column, a splicing part and a profiled steel sheet. Through the arrangement of the splicing parts and the profiled steel sheets, the splicing joint structure of the concrete-filled steel tube composite column and the reinforced concrete column is firm, and load transmission between the reinforced concrete composite column and the reinforced concrete column can be guaranteed; the lower ends of the steel bars are anchored in external concrete of the concrete filled steel tube composite column, the connecting steel plates resist slippage between the external concrete and the steel tubes, and the profiled steel plates can serve as a part of formworks during concrete pouring, do not need to be dismantled after pouring is completed and can form a firm whole with other components of the splicing joint to jointly participate in work. The stress performance is improved; meanwhile, the joint is simple in structure and convenient to construct, splicing of the concrete filled steel tube composite column and the reinforced concrete column is achieved, and the joint has wide application prospects in high-rise buildings.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a splicing node of a steel tube concrete composite column and a reinforced concrete column and a construction method. Background Art

[0002] Steel tube concrete composite column is a new type of efficient composite component developed in recent years. It can give full play to the material properties of both steel and concrete, and has the advantages of high bearing capacity and good seismic performance. At the same time, it is also conducive to the application of high-strength concrete, which can reduce the cross-sectional size of the column, thus having greater advantages in the spatial layout of the building. However, with the increase in building height, the vertical load on the structure of the high-rise building gradually decreases, and it is no longer necessary to continue to use steel tube concrete composite columns. Therefore, after the building reaches a certain height, the steel tube concrete composite column can be replaced with an ordinary reinforced concrete column to save steel and reduce costs. However, since there is currently no more reliable way to splice the two, the application and development of steel tube concrete composite columns in high-rise buildings is restricted. Summary of the invention

[0003] The invention discloses a splicing node of a steel tube concrete composite column and a reinforced concrete column and a construction method to solve the above problems.

[0004] The present invention adopts the following scheme: The present application provides a splicing node of a steel tube concrete composite column and a reinforced concrete column, comprising a steel tube concrete composite column and a reinforced concrete column, and also comprising an annular splicing portion and a corrugated steel plate, wherein the splicing portion is provided with a plurality of first through holes along an annular direction, and a plurality of first slots with outer openings; Two connecting steel plates are arranged at intervals along the vertical direction on the outer side of the steel pipe, the connecting steel plate at the upper end is provided with a second through hole and a second slot corresponding to the first through hole and the first slot, and the connecting steel plate at the lower end is provided with a third slot corresponding to the second slot; the splicing part is sleeved and connected to the steel pipe and placed on the connecting steel plate at the upper end; the corrugated steel plate is provided with a clamping part adapted to the slot, and the clamping part is arranged outside the steel pipe; The longitudinal reinforcement of the reinforced concrete column is inserted into the through hole; and concrete is poured in the corrugated steel plate.

[0005] Furthermore, the splicing part includes two annular steel plates spaced apart in the vertical direction and a longitudinal steel plate connected between the outer ends of the two annular steel plates; the annular steel plate is placed on the inner side of the longitudinal steel plate and is provided with a plurality of the first through holes along the annular direction, and a plurality of first card grooves with outer openings, and the longitudinal steel plate is provided with a through groove corresponding to the outer opening.

[0006] Furthermore, the annular steel plate is a square-shaped steel plate with a hollow center, and the longitudinal steel plates include angle steels connecting the four corners of the two square-shaped steel plates with a hollow center, and four square steel plates disposed between the angle steels to connect the square-shaped steel plates with a hollow center. The square steel plates and the angle steels are spaced apart to form the through slots.

[0007] Furthermore, the first connecting steel plate disposed at the upper outer side of the steel pipe includes four transverse angle steels, one web of which is welded to the outer side of the steel pipe, and the other web is provided with the second through hole and the second card slot; the second connecting steel plate at the lower end is four transverse channel steels in a C shape, the web in the middle of which is welded to the outer side of the steel pipe, and the upper and lower wing plates are provided with the third card slots.

[0008] Furthermore, the profiled steel sheet is formed by connecting four steel sheets with through-long clamping parts, and the steel sheets are buckled to each other through the bent parts on the sides.

[0009] Furthermore, a limiting plate for limiting with the connecting steel plate at the upper outer side of the steel pipe or the upper end face of the splicing part is arranged on the inner side of the profiled steel sheet.

[0010] Furthermore, high-strength concrete is poured into the steel pipe, and high-ductility concrete is poured between the profiled steel sheet and the steel pipe.

[0011] A construction method for the splicing joint includes the following steps: welding two square-shaped steel plates with a hollow center, four angle steels and four square steel plates into a splicing part; welding the first connecting steel plate and the second connecting steel plate to the outer side of the steel pipe; sleeving the splicing part on the steel pipe and placing it on the first connecting steel plate, and performing welding and fixing; opposing the clamping parts of the profiled steel sheet to the bayonet, and sequentially passing through the splicing part, the first connecting steel plate and the second connecting steel plate from top to bottom, and surrounding the outside of the steel pipe; vertically passing the longitudinal bars of the reinforced concrete column through the through holes from top to bottom, extending into the pouring space formed by the steel pipe and the profiled steel sheet, and performing spot welding and fixing at the positions of the through holes; erecting a pouring formwork outside the longitudinal bars, and then pouring concrete into the steel pipe, the pouring space formed by the steel pipe and the profiled steel sheet, and the pouring formwork.

[0012] Furthermore, first pour high-strength concrete into the steel pipe, then pour high-ductility concrete between the profiled steel sheet and the steel pipe, and finally pour ordinary concrete into the pouring formwork.

[0013] By adopting the above technical solutions, the present invention can achieve the following technical effects: The present invention provides a splicing node of a steel tube concrete composite column and a reinforced concrete column. The splicing part and the corrugated steel plate are arranged to make the splicing node structure of the steel tube concrete composite column and the reinforced concrete column firm, and can ensure the load transfer between the reinforced concrete composite column and the reinforced concrete column; the lower end of the steel bar is anchored in the external concrete of the steel tube concrete composite column, the connecting steel plate resists the slip between the external concrete and the steel tube, the corrugated steel plate can be used as a part of the template when pouring concrete, and does not need to be removed after the pouring is completed, and can form a firm whole with other components of the splicing node to work together, thereby improving its stress performance; at the same time, the node has a simple structure and is convenient to construct, and realizes the splicing of the steel tube concrete composite column and the reinforced concrete column, and has broad application prospects in high-rise buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a joint structure of a steel tube concrete composite column and a reinforced concrete column according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a splicing portion of a splicing node of a steel tube concrete composite column and a reinforced concrete column according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of a splicing portion of a splicing node of a steel tube concrete composite column and a reinforced concrete column according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of welding steel pipes, transverse angle steels and transverse channel steels at a splicing node of a steel tube concrete composite column and a reinforced concrete column according to an embodiment of the present invention; Figure 5 It is a schematic diagram of a corrugated steel plate structure of a splicing node between a steel tube concrete composite column and a reinforced concrete column according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the top view of the structure of a steel tube concrete composite column after assembly at a splicing node of a steel tube concrete composite column and a reinforced concrete column according to an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a splicing node of a steel tube concrete composite column and a reinforced concrete column after the longitudinal reinforcement of the reinforced concrete is assembled according to an embodiment of the present invention; Icon: splicing part 1, U-shaped steel plate 11, angle steel 12, square steel plate 13, first through hole 14; first slot 15, steel tube concrete composite column 2, steel tube 21, transverse angle steel 22, transverse channel steel 23, corrugated steel plate 24, reinforced concrete column 3, longitudinal reinforcement 31, second through hole 221, second slot 222, third slot 231, clamping part 241. DETAILED DESCRIPTION

[0015] Example Combination Figures 1 to 7As shown, this embodiment provides a splicing node of a steel tube 21 concrete composite column 2 and a reinforced concrete column 3, including a steel tube 21 concrete composite column 2 and a reinforced concrete column 3, and also includes an annular splicing portion 1 and a corrugated steel plate 24, wherein the splicing portion 1 is provided with a plurality of first through holes 14 along a circular direction, and a plurality of first slots 15 with outer openings; Two connecting steel plates are arranged at intervals along the vertical direction on the outer side of the steel pipe 21, the connecting steel plate at the upper end is provided with a second through hole 221 and a second slot 222 corresponding to the first through hole 14 and the first slot 15, and the connecting steel plate at the lower end is provided with a third slot 231 corresponding to the second slot 222; the splicing portion 1 is sleeved and connected to the steel pipe 21 and placed on the connecting steel plate at the upper end; the corrugated steel plate 24 is provided with a clamping portion 241 adapted to the slot, and the clamping portion 241 is arranged outside the steel pipe 21; The longitudinal reinforcement 31 of the reinforced concrete column 3 is inserted into the through hole; and concrete is poured in the corrugated steel plate 24 .

[0016] By setting the splicing part 1 and the corrugated steel plate 24, the splicing node structure of the steel tube 21 concrete composite column 2 and the reinforced concrete column 3 is made firm, which can ensure the load transfer between the reinforced concrete composite column and the reinforced concrete column 3; the lower end of the steel bar is anchored in the external concrete of the steel tube 21 concrete composite column 2, and the connecting steel plate resists the slippage between the external concrete and the steel tube 21. The corrugated steel plate 24 can be used as a part of the template when pouring concrete, and does not need to be removed after the pouring is completed. It can form a firm whole with other components of the splicing node to work together and improve its force performance; at the same time, the node has a simple structure and convenient construction, which realizes the splicing of the steel tube 21 concrete composite column 2 and the reinforced concrete column 3, and has broad application prospects in high-rise buildings.

[0017] In this embodiment, the square steel tube 21 concrete composite column 2 and the reinforced concrete column 3 are taken as examples. Figure 2 As shown, the splicing part 1 includes two U-shaped steel plates 11 spaced apart in the vertical direction, and a longitudinal steel plate welded between the outer ends of the two U-shaped steel plates 11; the annular steel plate is placed on the inner side of the longitudinal steel plate and is provided with a plurality of the first through holes 14 and a plurality of first slots 15 with outer openings in the annular direction, and the longitudinal steel plate is provided with through slots corresponding to the outer openings. The longitudinal steel plate includes an angle steel 12 connected between the four corners of the two U-shaped steel plates 11, and four square steel plates 13 placed between the angle steels 12 and connected to the U-shaped steel plates 11, and the square steel plates 13 and the angle steels 12 are spaced apart to form the through slots.

[0018] like Figure 4As shown, the steel pipe 21 is a square steel pipe 21, and the first connecting steel plate and the second connecting steel plate are welded at intervals along the vertical direction on the outer side thereof. The first connecting steel plate at the upper end includes four transverse angle steels 22, one web of which is welded to the outer side of the steel pipe 21, and the other web is provided with the second through hole 221 and the second clamping groove 222; the second connecting steel plate at the lower end is four transverse channel steels 23 in the shape of a Chinese character, the middle web of which is welded to the outer side of the steel pipe 21, and the upper and lower wing plates are provided with the third clamping groove 231.

[0019] In this embodiment, if Figure 5 As shown, the corrugated steel plate 24 is formed by connecting four steel plates with a full-length clamping portion 241, and the steel plates are buckled with each other through the bending portion of the side. Of course, the four steel plates can also be formed into an integrated corrugated steel plate 24 by welding the side. The inner side of the corrugated steel plate 24 is provided with a limit plate that limits the connection steel plate at the upper end of the outer side of the steel pipe 21 or the upper end surface of the splicing portion 1. So that the corrugated steel plate 24 can prevent it from sliding down when the clamping portion 241 is aligned with the clamping groove and is sleeved on the outer side of the steel pipe 21 from top to bottom; so that the upper end surface of the corrugated steel plate 24 is flush with the upper end surface of the splicing portion 1, or partially higher than the upper end surface of the splicing portion 1.

[0020] like Figure 7 As shown, the longitudinal reinforcement 31 of the reinforced concrete column 3 passes through the first through hole 14 and the second through hole 221 and abuts against the transverse channel steel 23; is placed in the casting space between the steel pipe 21 and the corrugated steel plate 24, and is fixed by electric welding at the through hole; and the longitudinal reinforcement 31 placed outside the casting space is hooped with stirrups. Of course, in other embodiments, the steel cage of the reinforced concrete column 3 can be prefabricated, and the longitudinal reinforcement 31 at one end of the steel cage is reserved with a plug-in section without the stirrup, and the plug-in section is plugged into the through hole after the steel cage is hoisted, and then fixed by spot welding.

[0021] Preferably, in this embodiment, high-strength concrete is poured inside the steel pipe 21, high-ductility concrete is poured between the corrugated steel plate 24 and the steel pipe 21, and a casting formwork is set up outside the longitudinal reinforcement 31 and ordinary concrete is poured.

[0022] A construction method of a splicing node comprises the following steps: Weld two U-shaped steel plates 11, four angle steels 12 and four square steel plates 13 into a splicing portion 1; weld a first connecting steel plate and a second connecting steel plate on the outer side of the steel pipe 21; The splicing part 1 is sleeved on the steel pipe 21 and placed on the first connecting steel plate, and then fixed by welding; The clamping portion 241 of the corrugated steel plate 24 is aligned with the clamping port, and passes through the splicing portion 1, the first connecting steel plate and the second connecting steel plate in sequence from top to bottom, and is arranged outside the steel pipe 21; The longitudinal reinforcement 31 of the reinforced concrete column 3 is passed vertically through the through holes from top to bottom, and extends into the casting space formed by the steel pipe 21 and the corrugated steel plate 24, and is fixed by spot welding at the through hole position; A casting formwork is set up outside the longitudinal reinforcement 31, and then concrete is poured into the steel pipe 21, into the casting space formed by the steel pipe 21 and the corrugated steel plate 24, and into the casting formwork.

[0023] When pouring concrete, high-strength concrete is first poured into the steel pipe 21 , and then high-ductility concrete is poured between the corrugated steel plate 24 and the steel pipe 21 , and finally ordinary concrete is poured into the pouring template.

[0024] It should be understood that the above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0025] The above description of the drawings used in the implementation manner only illustrates certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

Claims

1. A splicing node of a steel tube concrete composite column and a reinforced concrete column, comprising a steel tube concrete composite column and a reinforced concrete column, characterized in that: It also includes an annular splicing part and profiled steel sheets. A plurality of first through holes and a plurality of first clamping grooves with outer openings are arranged on the splicing part along the circumferential direction. Two connecting steel plates are arranged at intervals along the vertical direction on the outer side of the steel pipe. The upper connecting steel plate is provided with second through holes and second clamping grooves corresponding to the first through holes and the first clamping grooves, and the lower connecting steel plate is provided with third clamping grooves corresponding to the second clamping grooves. The splicing part is sleeved and connected to the steel pipe and placed on the upper connecting steel plate. The profiled steel sheet is provided with a clamping part adapted to the clamping groove, and the clamping part is clamped around the outside of the steel pipe. The longitudinal bars of the reinforced concrete column are inserted into the through holes. Concrete is poured into the profiled steel sheet.

2. The splicing node of the steel tube concrete composite column and the reinforced concrete column according to claim 1 is characterized in that: The splicing part includes two annular steel plates arranged at intervals along the vertical direction and longitudinal steel plates connected between the outer ends of the two annular steel plates. A plurality of the first through holes and a plurality of first clamping grooves with outer openings are arranged on the annular steel plate along the circumferential direction on the inner side of the longitudinal steel plate, and through grooves corresponding to the outer openings are arranged on the longitudinal steel plate.

3. The splicing node of the steel tube concrete composite column and the reinforced concrete column according to claim 2 is characterized in that: The annular steel plate is a square frame steel plate. The longitudinal steel plate includes angle steels connected between the four corners of the two square frame steel plates and four square steel plates placed between the angle steels and connecting the square frame steel plates. A through groove is formed by arranging intervals between the square steel plate and the angle steel.

4. The splicing node of the steel tube concrete composite column and the reinforced concrete column according to claim 3 is characterized in that: The first connecting steel plate placed at the upper outer side of the steel pipe includes four transverse angle steels. One web is welded to the outer side edge of the steel pipe, and the other web is provided with the second through hole and the second clamping groove. The second connecting steel plate at the lower end is four transverse channel steels in a C shape. The middle web is welded to the outer side edge of the steel pipe, and the upper and lower wing plates are provided with the third clamping grooves.

5. The splicing node of the steel tube concrete composite column and the reinforced concrete column according to claim 4, characterized in that: The profiled steel sheet is formed by connecting four steel sheets with through-length clamping parts, and the steel sheets are mutually buckled through the bending parts on the side edges.

6. The splicing node of the steel tube concrete composite column and the reinforced concrete column according to claim 1, characterized in that: A limiting plate for limiting the upper connecting steel plate on the outer side of the steel pipe or the upper end face of the splicing part is arranged on the inner side of the profiled steel sheet.

7. The splicing node of the steel tube concrete composite column and the reinforced concrete column according to claim 1, characterized in that: High-strength concrete is poured into the steel pipe, and high-ductility concrete is poured between the profiled steel sheet and the steel pipe.

8. A construction method for a splicing node according to any one of claims 3 to 7, characterized in that: It includes the following steps: welding two square frame steel plates, four angle steels and four square steel plates into a splicing part; welding the first connecting steel plate and the second connecting steel plate on the outer side edge of the steel pipe; sleeving the splicing part on the steel pipe and placing it on the first connecting steel plate, and welding and fixing it; opposing the clamping part of the profiled steel sheet to the bayonet, and sequentially passing through the splicing part, the first connecting steel plate and the second connecting steel plate from top to bottom, and clamping around the outside of the steel pipe; vertically passing the longitudinal bars of the reinforced concrete column through the through holes from top to bottom in sequence, extending into the pouring space formed by the steel pipe and the profiled steel sheet, and performing spot welding and fixing at the positions of the through holes; erecting a pouring formwork outside the longitudinal bars, and then pouring concrete into the steel pipe, the pouring space formed by the steel pipe and the profiled steel sheet, and the pouring formwork.

9. The construction method of the splicing node according to claim 8, characterized in that: Firstly, high-strength concrete is poured in the steel pipe, then high-ductility concrete is poured between the corrugated steel plate and the steel pipe, and finally ordinary concrete is poured in the pouring formwork.

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