Concrete filled steel tube composite column holing reinforcement node structure

Abstract

The utility model relates to a concrete filled steel tube composite column holing reinforcement node structure which comprises a composite column and a concrete beam which are vertically intersected, a plurality of core area longitudinal bars are arranged in the concrete beam, the concrete beam is connected with the composite column through the plurality of core area longitudinal bars, and the core area longitudinal bars are connected with the composite column through the core area longitudinal bars. The composite column comprises a steel pipe, an outer concrete layer and an inner concrete layer, the steel pipe is arranged between the outer concrete layer and the inner concrete layer and extends in the height direction of the composite column, the multiple core area longitudinal bars sequentially penetrate through the outer concrete layer, the steel pipe and the inner concrete layer, and a first fixing hole and a second fixing hole are correspondingly formed in the pipe wall of the steel pipe. And the steel pipe is provided with a pipe wall thickening area at a position corresponding to the first fixing hole and the second fixing hole. The steel tube concrete composite column holing reinforcement node structure solves the problem that a traditional holing reinforcement node is large in welding workload.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a steel tube concrete composite column hole reinforcement node structure. Background Art

[0002] Due to the high loads on super-high-rise buildings and the restrictions on column cross-sections, excessively large column sections will affect the building's functionality. If conventional reinforced concrete columns were used, the axial compression would not meet regulatory requirements. Concrete-filled steel tube (CFST) composite columns are a combination of concrete-filled steel tube (CFST) and reinforced concrete (RCF). The ferrule effect of the steel tube increases the axial compressive bearing capacity of the concrete within the tube, significantly contributing to the reduction of column cross-section size. Furthermore, CFST composite columns offer advantages such as high bearing capacity and excellent seismic performance. Consequently, they are increasingly being used in high-rise buildings, especially super-high-rise buildings.

[0003] When the composite column is connected to the concrete beam, the main method of dealing with the longitudinal reinforcement of the concrete beam encountering the steel pipe is to drill a hole in the steel pipe to allow the steel bar to pass through the cross section of the steel pipe. When the cross-sectional loss rate of the steel pipe exceeds a certain value, reinforcement measures must be taken for the steel pipe.

[0004] The conventional reinforcement method is to add inner ring plates above and below the opening inside or outside the steel pipe, and vertical stiffening plates on both sides of the opening for reinforcement. However, this reinforcement method requires a large amount of welding work inside the steel pipe on the one hand, and on the other hand, it will form multiple partitions inside the steel pipe, which will affect the pouring quality of the concrete inside the steel pipe. Utility Model Content

[0005] The main purpose of the utility model is to provide a steel tube concrete composite column hole reinforcement node structure, aiming to solve the problem of large welding workload of the existing hole reinforcement node.

[0006] To achieve the above-mentioned purpose, the utility model proposes a steel tube concrete composite column opening reinforcement node structure, comprising a composite column and a concrete beam intersecting vertically, wherein a plurality of core area longitudinal bars are provided in the concrete beam, and the concrete beam is connected to the composite column through the plurality of core area longitudinal bars, the composite column comprising an outer concrete layer, an inner concrete layer and a steel pipe, the steel pipe is arranged between the outer concrete layer and the inner concrete layer, the steel pipe extends along the height direction of the composite column, the plurality of core area longitudinal bars are sequentially arranged through the outer concrete layer, the steel pipe and the inner concrete layer, the tube wall of the steel pipe is correspondingly provided with a first fixing hole and a second fixing hole for the plurality of core area longitudinal bars to pass through in sequence, and the steel pipe is provided with a tube wall thickening area at the corresponding positions of the first fixing hole and the second fixing hole.

[0007] According to some embodiments of the present invention, the steel pipe includes a first steel pipe section, a second steel pipe section and a third steel pipe section, the pipe wall thickening area is located on the second steel pipe section, the first steel pipe section and the third steel pipe section are connected through the second steel pipe section, and the pipe wall thickness of the second steel pipe section is greater than the pipe wall thickness of the first steel pipe section and the third steel pipe section.

[0008] According to some embodiments of the present invention, one end of the second steel pipe segment is welded to the first steel pipe segment, and the other end is welded to the third steel pipe segment.

[0009] According to some embodiments of the present invention, the steel pipe also includes two lined steel pipe sections sleeved on the inner wall of the second steel pipe section, and the two lined steel pipe sections are respectively located at the welding position between the second steel pipe section and the first steel pipe section, and the welding position between the second steel pipe section and the third steel pipe section.

[0010] According to some embodiments of the present invention, a plurality of edge zone longitudinal reinforcements are further provided in the concrete beam, and the plurality of edge zone longitudinal reinforcements are all arranged through the composite column.

[0011] According to some embodiments of the present invention, the plurality of edge zone longitudinal reinforcements are arranged through the outer concrete layer.

[0012] According to some embodiments of the present invention, the edge area longitudinal reinforcement includes a first longitudinal reinforcement segment, a second longitudinal reinforcement segment, a third longitudinal reinforcement segment and a fourth longitudinal reinforcement segment connected in sequence end to end, the second longitudinal reinforcement segment and the third longitudinal reinforcement segment are arranged through the outer concrete layer, the extension direction of the first longitudinal reinforcement segment and the fourth longitudinal reinforcement segment is parallel to the extension direction of the core area longitudinal reinforcement, and the second longitudinal reinforcement segment and the third longitudinal reinforcement segment are inclined in the direction away from the steel pipe.

[0013] According to some embodiments of the present invention, a plurality of bolts are arranged on the outer wall of the steel pipe along its circumference.

[0014] According to some embodiments of the present invention, two reinforcing plates are provided on the inner wall of the steel pipe, and the two reinforcing plates are respectively provided on the outer sides of the first fixing hole and the second fixing hole and extend along the circumference thereof.

[0015] The utility model has at least the following beneficial effects:

[0016] In the present invention, the composite column intersects the concrete beam perpendicularly, and a plurality of core longitudinal bars are provided in the concrete beam. The concrete beam is connected to the composite column through the plurality of core longitudinal bars. The composite column includes a steel pipe, an outer concrete layer and an inner concrete layer. The steel pipe is provided between the outer concrete layer and the inner concrete layer. The steel pipe extends along the height direction of the composite column. The plurality of core longitudinal bars pass through the outer concrete layer, the steel pipe and the inner concrete layer in sequence. The tube wall of the steel pipe is correspondingly provided with a first fixing hole and a second fixing hole for the plurality of core longitudinal bars to pass through in sequence. The steel pipe is provided with a tube wall thickening area at the corresponding positions of the first fixing hole and the second fixing hole. Existing hole reinforcement nodes are generally based on the number of longitudinal bars in the core area, with a corresponding number of small fixing holes opened on the wall of the steel pipe, and a reinforcement ring plate welded to the inner wall of the steel pipe at the position corresponding to each fixing hole. This results in a huge amount of welding work, and the multiple reinforcement ring plates will also affect the quality of concrete pouring in the steel pipe. However, the present application opens a first and a second fixing hole with a larger area on the wall of the steel pipe to allow multiple longitudinal bars in the core area to pass through in sequence, eliminating all welded reinforcement ring plates and greatly reducing the welding workload. In order to structurally strengthen the position of the fixing holes, the wall thickening area is provided to thicken the wall of the opening area of ​​the steel pipe, which will not affect the quality of pouring the inner concrete layer in the steel pipe. The steel tube concrete composite column hole reinforcement node structure provided by the utility model solves the problem that the traditional hole reinforcement node has a large welding workload and affects the quality of concrete pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic cross-sectional view of a reinforced node structure for a steel tube concrete composite column with an opening provided by an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the steel pipe structure.

[0020] Description of reference numerals:

[0021] 100-Steel tube concrete composite column opening reinforcement node structure; 1-Composite column; 11-Steel tube; 111-First steel tube segment; 112-Second steel tube segment; 1121-First fixing hole; 1122-Second fixing hole; 113-Third steel tube segment; 114-Inner lining steel tube segment; 12-Outer concrete layer; 13-Inner concrete layer; 14-Studs; 2-Concrete beam; 21-Core area longitudinal reinforcement; 22-Edge area longitudinal reinforcement; 221-First longitudinal reinforcement segment; 222-Second longitudinal reinforcement segment; 223-Third longitudinal reinforcement segment; 224-Fourth longitudinal reinforcement segment. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The utility model provides a steel tube concrete composite column opening reinforcement node structure. Figures 1 to 2 The utility model provides a concrete embodiment of a steel tube concrete composite column opening reinforcement node structure.

[0026] like Figure 1As shown, an embodiment of the present invention provides a steel tube concrete composite column opening reinforcement node structure 100, comprising a composite column 1 and a concrete beam 2 intersecting vertically, wherein a plurality of core longitudinal bars 21 are provided in the concrete beam 2, and the concrete beam 2 is connected to the composite column 1 through the plurality of core longitudinal bars 21, and the composite column 1 comprises a steel tube 11, an outer concrete layer 12 and an inner concrete layer 13, wherein the steel tube 11 is arranged between the outer concrete layer 12 and the inner concrete layer 13, and the steel tube 11 extends along the height direction of the composite column 1, and the plurality of core longitudinal bars 21 are sequentially arranged through the outer concrete layer 12, the steel tube 11 and the inner concrete layer 13, and the tube wall of the steel tube 11 is correspondingly provided with a first fixing hole 1121 and a second fixing hole 1122 for the plurality of core longitudinal bars 21 to pass through in sequence, and the steel tube 11 is provided with a tube wall thickening area at the corresponding positions of the first fixing hole 1121 and the second fixing hole 1122.

[0027] In the present invention, the composite column 1 intersects the concrete beam 2 perpendicularly, and a plurality of core longitudinal bars 21 are provided in the concrete beam 2. The concrete beam 2 is connected to the composite column 1 through the plurality of core longitudinal bars 21. The composite column 1 includes a steel pipe 11, an outer concrete layer 12 and an inner concrete layer 13. The steel pipe 11 is provided between the outer concrete layer 12 and the inner concrete layer 13. The steel pipe 11 extends along the height direction of the composite column 1. The plurality of core longitudinal bars 21 pass through the outer concrete layer 12, the steel pipe 11 and the inner concrete layer 13 in sequence. The wall of the steel pipe 11 is correspondingly provided with a first fixing hole 1121 and a second fixing hole 1122 for the plurality of core longitudinal bars 21 to pass through in sequence. The steel pipe 11 is provided with a wall thickening area at the corresponding positions of the first fixing hole 1121 and the second fixing hole 1122. Existing hole reinforcement nodes generally open a corresponding number of small fixing holes on the wall of the steel pipe 11 according to the number of the core area longitudinal bars 21, and weld a reinforcement ring plate on the inner wall of the steel pipe 11 at the position of each fixing hole. This results in a huge amount of welding work, and the multiple reinforcement ring plates will also affect the quality of concrete pouring in the steel pipe 11. However, the present application opens a first fixing hole 1121 and a second fixing hole 1122 with a larger area on the wall of the steel pipe 11 to allow multiple core area longitudinal bars 21 to pass through in sequence, eliminating all welded reinforcement ring plates and greatly reducing the welding workload. In order to structurally strengthen the position of the fixing holes, the wall thickening area is provided to thicken the wall of the opening area of ​​the steel pipe 11, which will not affect the pouring quality of the inner concrete layer 13 in the steel pipe 11. The steel tube concrete composite column hole reinforcement node structure 100 provided by the present invention solves the problem that the traditional hole reinforcement node has a large welding workload and affects the quality of concrete pouring.

[0028] It should be noted that the workers first fix the multiple core area longitudinal reinforcements 21 and the steel pipe 11, then make the molds of the composite column 1 and the concrete beam 2, and finally pour concrete into the molds to complete the entire construction process. The concrete in the steel pipe 11 solidifies to form the inner concrete layer 13, and the concrete outside the steel pipe 11 solidifies to form the outer concrete layer 12.

[0029] Specifically, in this embodiment, two groups of core area longitudinal reinforcements 21 are provided in the concrete beam 2, and the two groups of core area longitudinal reinforcements 21 are arranged at intervals in the height direction of the composite column 1. Correspondingly, the tube wall of the steel pipe 11 is provided with two first fixing holes 1121 and two second fixing holes 1122, one by one, for the two groups of core area longitudinal reinforcements 21 to pass through in sequence.

[0030] The specific structure of the steel pipe 11 is not limited, as long as the wall of the steel pipe 11 is thickened in the opening area. For example, in some embodiments, Figure 2 As shown, the steel pipe 11 further includes a first steel pipe segment 111, a second steel pipe segment 112, and a third steel pipe segment 113. The wall-thickened region is located on the second steel pipe segment 112. The first steel pipe segment 111 and the third steel pipe segment 113 are connected via the second steel pipe segment 112. The wall thickness of the second steel pipe segment 112 is greater than that of the first steel pipe segment 111 and the third steel pipe segment 113. With this arrangement, the wall-thickening process is performed only on the second steel pipe segment 112, while the first steel pipe segment 111 and the third steel pipe segment 113 maintain a normal wall thickness. Compared to performing wall-thickening on the entire steel pipe 11, this significantly saves steel and reduces production costs.

[0031] Preferably, in some embodiments, Figure 2 As shown, one end of the second steel pipe segment 112 is welded to the first steel pipe segment 111, and the other end is welded to the third steel pipe segment 113. Specifically, the second steel pipe segment 112 is formed by crimping and welding a thickened steel plate, while the first steel pipe segment 111 and the third steel pipe segment 113 are formed by crimping and welding two steel plates of conventional thickness. The steel pipe segments are connected by welding, which reduces production costs.

[0032] If the steel pipe sections are directly welded, welding deviation may occur, affecting the welding quality. In order to improve the welding effect, in some embodiments, such as Figure 2As shown, the steel pipe 11 also includes two lining steel pipe sections 114 sleeved onto the inner wall of the second steel pipe section 112. The two lining steel pipe sections 114 are located respectively at the welding position between the second steel pipe section 112 and the first steel pipe section 111, and at the welding position between the second steel pipe section 112 and the third steel pipe section 113. With this arrangement, since the inner wall diameters of the steel pipe sections are consistent, both steel pipe sections to be welded can be sleeved onto the lining steel pipe sections 114, with the lining steel pipe sections 114 forming abutment with each other before the two steel pipe sections are welded, ensuring no welding deviation and guaranteeing welding quality.

[0033] In order to make the connection between the concrete beam 2 and the composite column 1 more secure, in some embodiments, as shown in FIG. Figure 1 As shown, the concrete beam 2 is further provided with a plurality of edge longitudinal bars 22, which are all arranged through the composite column 1. In this arrangement, the concrete beam 2 and the composite column 1 are connected via the plurality of core longitudinal bars 21 and the plurality of edge longitudinal bars 22. By increasing the number of longitudinal bars, the connection stability between the concrete beam 2 and the composite column 1 can be improved.

[0034] Furthermore, in some embodiments, Figure 1 As shown, the plurality of edge region longitudinal bars 22 are arranged through the outer concrete layer 12. This arrangement avoids the need to open fixing holes on the steel pipe 11 for the plurality of edge region longitudinal bars 22 to pass through, which would result in excessive loss of cross-sectional area of ​​the steel pipe 11 and affect the structural strength of the steel pipe 11.

[0035] Furthermore, the specific composition of the edge region longitudinal reinforcement 22 is not limited, as long as the plurality of edge region longitudinal reinforcements 22 can be arranged to penetrate the outer concrete layer 12. For example, in some embodiments, Figure 1 As shown, the edge region longitudinal reinforcement 22 includes a first longitudinal reinforcement segment 221, a second longitudinal reinforcement segment 222, a third longitudinal reinforcement segment 223, and a fourth longitudinal reinforcement segment 224, which are connected end to end. The second longitudinal reinforcement segment 222 and the third longitudinal reinforcement segment 223 are arranged through the outer concrete layer 12. The extension direction of the first longitudinal reinforcement segment 221 and the fourth longitudinal reinforcement segment 224 is parallel to the extension direction of the core region longitudinal reinforcement 21. The second longitudinal reinforcement segment 222 and the third longitudinal reinforcement segment 223 are arranged obliquely away from the steel tube 11. Because the second longitudinal reinforcement segment 222 and the third longitudinal reinforcement segment 223 only pass through the outer concrete layer 12, the oblique arrangement of the second longitudinal reinforcement segment 222 and the third longitudinal reinforcement segment 223 offsets the area of ​​the steel tube 11. At the same time, the concrete beam 2 needs to be horizontally haunched at the beam end to accommodate the oblique arrangement of the second longitudinal reinforcement segment 222 and the third longitudinal reinforcement segment 223.

[0036] In order to improve the structural strength of the composite column 1, in some embodiments, as Figure 1 As shown, a plurality of studs 14 are arranged along the circumference of the outer wall of the steel pipe 11. The plurality of studs 14 are welded and fixed to the outer wall of the steel pipe 11. By providing the studs 14, the studs 14 and the steel pipe 11 are considered as one body, which increases the contact area between the concrete and the steel pipe 11 and improves the structural strength of the composite column 1.

[0037] To further enhance the structural strength of the opening region of the steel tube 11, in some embodiments, two reinforcing plates are provided on the inner wall of the steel tube 11. These reinforcing plates are respectively disposed outside the first fixing hole 1121 and the second fixing hole 1122 and extend circumferentially therefrom. The provision of two annular reinforcing plates further enhances the structural strength of the opening region of the steel tube 11.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reinforced joint structure of steel tube concrete composite columns with openings, characterized in that: It includes vertically intersecting composite columns and concrete beams, a plurality of core longitudinal bars are provided in the concrete beam, and the concrete beam is connected to the composite column through the plurality of core longitudinal bars. The composite column includes a steel pipe, an outer concrete layer and an inner concrete layer. The steel pipe is arranged between the outer concrete layer and the inner concrete layer, and the steel pipe extends along the height direction of the composite column. The plurality of core longitudinal bars are sequentially arranged through the outer concrete layer, the steel pipe and the inner concrete layer. The tube wall of the steel pipe is correspondingly provided with a first fixing hole and a second fixing hole for the plurality of core longitudinal bars to pass through in sequence. The steel pipe is provided with a tube wall thickening area at the corresponding positions of the first fixing hole and the second fixing hole.

2. The steel tube concrete composite column hole reinforcement node structure according to claim 1, characterized in that: The steel pipe includes a first steel pipe section, a second steel pipe section and a third steel pipe section. The wall thickening area is located on the second steel pipe section. The first steel pipe section and the third steel pipe section are connected through the second steel pipe section. The wall thickness of the second steel pipe section is greater than the wall thickness of the first steel pipe section and the third steel pipe section.

3. The steel tube concrete composite column hole reinforcement node structure according to claim 2, characterized in that: One end of the second steel pipe segment is welded to the first steel pipe segment, and the other end is welded to the third steel pipe segment.

4. The steel tube concrete composite column hole reinforcement node structure according to claim 3, characterized in that: The steel pipe also includes two lining steel pipe sections sleeved on the inner wall of the second steel pipe section, and the two lining steel pipe sections are respectively located at the welding position between the second steel pipe section and the first steel pipe section, and the welding position between the second steel pipe section and the third steel pipe section.

5. The steel tube concrete composite column hole reinforcement node structure according to claim 1, characterized in that: A plurality of edge zone longitudinal reinforcements are further provided in the concrete beam, and the plurality of edge zone longitudinal reinforcements are all arranged through the composite column.

6. The steel tube concrete composite column hole reinforcement node structure according to claim 5, characterized in that: The plurality of edge zone longitudinal reinforcements are arranged through the outer concrete layer.

7. The reinforced joint structure of steel tube concrete composite columns with openings as claimed in claim 6, characterized in that: The edge area longitudinal reinforcement includes a first longitudinal reinforcement segment, a second longitudinal reinforcement segment, a third longitudinal reinforcement segment and a fourth longitudinal reinforcement segment connected in sequence end to end. The second longitudinal reinforcement segment and the third longitudinal reinforcement segment are arranged through the outer concrete layer. The extension direction of the first longitudinal reinforcement segment and the fourth longitudinal reinforcement segment is parallel to the extension direction of the core area longitudinal reinforcement. The second longitudinal reinforcement segment and the third longitudinal reinforcement segment are inclined in the direction away from the steel pipe.

8. The reinforced joint structure of steel tube concrete composite columns with openings according to claim 1, characterized in that: The outer wall of the steel pipe is provided with a plurality of bolts along its circumference.

9. The steel tube concrete composite column hole reinforcement node structure according to claim 1, characterized in that: The inner wall of the steel pipe is provided with two reinforcing plates, and the two reinforcing plates are respectively provided on the outer sides of the first fixing hole and the second fixing hole and extend along the circumference thereof.

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