Oblique crossing reinforced concrete beam and tubular column connecting structure

Abstract

The utility model discloses a connecting structure of a skew reinforced concrete beam and a tubular column. Comprising a tubular column, an annular steel corbel fixedly welded to the peripheral face of the tubular column, an annular reinforced concrete beam arranged in the annular direction of the tubular column and wrapping the annular steel corbel, and a diagonal reinforced concrete beam fixedly connected with the annular steel corbel and the annular reinforced concrete beam. The tubular column, the annular steel corbel and the annular reinforced concrete beam jointly bear the load transmitted by the oblique crossing reinforced concrete beam. According to the utility model, not only is the problem that the cross section is weakened due to trepanning on the tubular column avoided, but also the quality problems that the welding space is limited when the steel bar connecting sleeve is welded on the tubular column and the welding quality cannot be ensured due to oblique crossing of the steel bar connecting sleeve and the tubular column are solved; the construction quality problems of inaccurate alignment and the like caused by large position deviation when reinforcing steel bar perforation and reinforcing steel bar connecting sleeves are tightened and aligned on site are effectively avoided, the connecting structure is safe and reliable, the durability is good, the construction speed is high, the installation difficulty is low, and the construction quality is easy to guarantee.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a connection structure of an oblique reinforced concrete beam and a circular tube column. Background Art

[0002] In recent years, with the continuous development and innovation of my country's construction technology, round tube columns have been widely used in some high-rise buildings and large public buildings. By pouring concrete in round steel tubes, the round steel tubes play a circumferential constraint on the concrete, which can effectively improve the ductility of concrete, greatly improve the bearing capacity and seismic performance. Compared with traditional reinforced concrete columns, round tube columns can effectively reduce the column section, increase the use space of the building, and save construction time and cost. In construction, the node structure of the reinforced concrete beam obliquely intersecting with the round tube column is relatively complex, and the construction quality is difficult to guarantee. Therefore, the study of the connection node between the round tube column and the oblique reinforced concrete beam column has very important engineering practical significance.

[0003] In the prior art, there are usually three connection methods: one is to drill a hole on the circular tube column, and the oblique reinforced concrete beam steel bars pass through the holes in the circular tube column to connect; the second is to weld a steel bar connection sleeve on the circular tube column, and the oblique reinforced concrete beam steel bars are tightened and connected on site through the steel bar connection sleeve; the third is to weld a steel bar lap plate on the circular tube column, and the oblique reinforced concrete beam steel bars and the steel bar lap plate are welded and connected on site.

[0004] However, the above three methods all have their own shortcomings: first, if holes are drilled on the circular tube column, if there are more steel bars in the oblique reinforced concrete beam, more holes need to be drilled on the circular tube column, which will greatly weaken the strength and rigidity of the circular tube column itself and seriously affect the bearing capacity of the circular tube column. In addition, the oblique intersection of the reinforced concrete beam will lead to a large deviation in the position of the holes on the circular tube column, making it difficult to accurately punch holes on the construction site and ensuring the construction quality. Second, if a steel bar connecting sleeve is welded on the circular tube column, if there are more steel bars in the oblique reinforced concrete beam, more steel bar connecting sleeves need to be welded on the circular tube column, which will result in no welding space for the steel bar connecting sleeve, and the steel bar connecting sleeve and the circular tube column are not perpendicular, making it difficult to ensure the quality during welding. The oblique intersection of the reinforced concrete beam will also lead to a large deviation in the position of the steel bar connecting sleeve on the circular tube column, making it difficult to accurately align and tighten on the construction site, making it difficult to ensure the construction quality. Third, if a steel bar lap plate is welded on the circular tube column, if there are more steel bars in the oblique reinforced concrete beam, the workload of on-site welding will be large, and the welding space is limited, which will lead to slow construction speed and difficulty in ensuring construction quality. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the utility model is to provide a connection structure of oblique reinforced concrete beams and circular tubular columns, which is convenient for the on-site construction of the connection nodes of the oblique reinforced concrete beams and circular tubular columns. The connection structure is safe and reliable, has good durability, fast construction speed, low installation difficulty, and easy to ensure construction quality.

[0006] To achieve the above-mentioned purpose, the utility model provides a connection structure of an oblique reinforced concrete beam and a circular tubular column, comprising a circular tubular column, an annular steel corbel welded and fixed to the outer circumferential surface of the circular tubular column, an annular reinforced concrete beam circumferentially arranged along the circular tubular column and wrapping the annular steel corbel, and an oblique reinforced concrete beam connected and fixed to the annular steel corbel and the annular reinforced concrete beam; the circular tubular column, the annular steel corbel and the annular reinforced concrete beam jointly bear the load transmitted by the oblique reinforced concrete beam.

[0007] Preferably, the annular steel corbel is composed of two annular steel corbel plates distributed up and down and a plurality of annular steel corbel ribs connected between the two annular steel corbel plates and arranged circumferentially along the circular tube column; the annular steel corbel plates are provided with air holes, and the circular tube column is provided with inner partitions at positions corresponding to the annular steel corbel plates, and each inner partition is provided with casting holes to ensure that the concrete in the circular tube column is cast through.

[0008] Furthermore, the circumferential reinforced concrete beam includes concrete itself and circumferential upper longitudinal reinforcement, circumferential lower longitudinal reinforcement, circumferential inner waist reinforcement, circumferential outer waist reinforcement and circumferential stirrups; the circumferential upper longitudinal reinforcement, circumferential lower longitudinal reinforcement, circumferential inner waist reinforcement and circumferential outer waist reinforcement are all circumferentially arranged along the circular tube column, and the circumferential stirrups surround the circumferential upper longitudinal reinforcement, circumferential lower longitudinal reinforcement, circumferential inner waist reinforcement and circumferential outer waist reinforcement to form a closed rectangular shape.

[0009] Preferably, the oblique reinforced concrete beam includes the concrete beam itself and the upper longitudinal reinforcement of the beam, the lower longitudinal reinforcement of the beam, the side waist reinforcement of the beam and the beam stirrups; the upper longitudinal reinforcement of the beam and the side waist reinforcement of the beam are anchored in the annular reinforced concrete beam by means of steel bar bending anchors, and the lower longitudinal reinforcement of the beam is welded to the annular steel corbel ring plate below the annular steel corbel by means of steel bar welding.

[0010] Furthermore, the circular tube column is poured with concrete inside a vertical circular steel tube, and bolts are arranged on the inner wall of the circular steel tube.

[0011] Furthermore, the thickness of the annular steel corbel ring plate is not less than 25 mm, the thickness of the annular steel corbel rib plate is not less than 0.8 times the thickness of the annular steel corbel ring plate, and the width of the annular steel corbel ring plate is not less than 0.5 times the height of the oblique reinforced concrete beam and not less than 500 mm.

[0012] Preferably, at the intersection of the oblique reinforced concrete beam and the annular reinforced concrete beam, the bottom of the oblique reinforced concrete beam is at least 50 mm lower than the bottom of the annular reinforced concrete beam.

[0013] From the above, compared with the prior art, the oblique reinforced concrete beam and circular tube column connection structure of the utility model has at least the following beneficial effects:

[0014] 1. The upper longitudinal reinforcement and side waist reinforcement of the oblique reinforced concrete beam are anchored by steel bar bending, which avoids opening holes on the circular tube column. This will not weaken the strength and rigidity of the circular tube column itself, will not affect the bearing capacity of the circular tube column, and will not cause construction quality problems such as large deviation of the steel bar perforation position. The steel bar bending and anchoring construction is convenient and the construction quality is easy to guarantee.

[0015] 2. The lower steel bars of the oblique reinforced concrete beam are mainly welded to the lower flange plate of the annular steel corbel. The annular steel corbel ring plate has a large width and a large welding space, which helps to improve the welding quality, reduce the construction difficulty and ensure the construction quality.

[0016] 3. The upper longitudinal reinforcement, side waist reinforcement and lower longitudinal reinforcement of the oblique reinforced concrete beam are mainly connected and fixed by bending and welding steel bars, which avoids the problem of insufficient welding space for the steel bar connection sleeves when there are too many steel bars in the beam. There is also no construction quality problem of inaccurate alignment caused by large position deviation of the steel bar connection sleeves on the circular tube column when the steel bars and the steel bar connection sleeves are tightened on site. It also avoids the problem of difficulty in ensuring welding quality due to the non-perpendicularity of the steel bar connection sleeves and the circular tube column.

[0017] 4. The connection structure of the utility model is safe and reliable, has good durability, fast construction speed, low installation difficulty, and easy to ensure construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0019] Figure 1 It is a schematic diagram of the connection structure of the oblique reinforced concrete beam and the circular tube column of the utility model;

[0020] Figure 2 for Figure 1 AA section view in;

[0021] Figure 3 for Figure 1 BB section diagram in;

[0022] Figure 4 Schematic diagram of beam reinforcement connection.

[0023] Description of the numbers in the figure:

[0024] 1-circular tube column, 2-annular steel corbel, 21-annular steel corbel ring plate, 22-annular steel corbel rib, 23-ventilation hole, 3-annular reinforced concrete beam, 31-annular upper longitudinal reinforcement, 32-annular lower longitudinal reinforcement, 33-annular inner waist reinforcement, 34-annular outer waist reinforcement, 35-annular stirrups, 4-oblique reinforced concrete beam, 41-beam upper longitudinal reinforcement, 42-beam lower longitudinal reinforcement, 43-beam side waist reinforcement, 44-beam stirrups, 5-inner partition, 6-casting holes, 7-studs. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See below Figure 1 to Figure 4 The oblique reinforced concrete beam and circular tube column connection structure of the utility model is described in detail.

[0027] like Figure 1 and Figure 2 As shown, the present application discloses a connection structure of an oblique reinforced concrete beam and a circular tubular column, comprising a vertically arranged circular tubular column 1, an annular steel corbel 2, an annular reinforced concrete beam 3, and an oblique reinforced concrete beam 4. The annular steel corbel 2 is welded to the outer circumferential surface of the circular tubular column 1 in the factory, and the annular reinforced concrete beam 3 and the oblique reinforced concrete beam 4 are cast and constructed on site.

[0028] The circular column 1 is cast with concrete inside a vertical circular steel tube, and the inner wall of the circular steel tube is provided with bolts 7 to increase the bonding force between the concrete and the circular steel tube, ensuring that the concrete and the circular steel tube bear the load together. A reinforced concrete core column can also be provided inside the circular steel tube to greatly improve the compressive bearing capacity and seismic performance of the circular column.

[0029] like Figure 2 and Figure 3 As shown, the annular steel corbel 2 is composed of two annular steel corbel ring plates 21 (upper and lower flange plates) distributed up and down and a plurality of annular steel corbel ribs 22 connected between the two annular steel corbel ring plates 21 and arranged circumferentially along the circular tube column 1.

[0030] The thickness of the annular steel corbel ring plate 21 (upper and lower flange plates) shall not be less than the diameter of the steel bar and shall not be less than 25 mm. The thickness of the annular steel corbel rib plate 22 shall not be less than 0.8 times the thickness of the annular steel corbel ring plate 21 (upper and lower flange plates), and the width of the annular steel corbel ring plate 21 (upper and lower flange plates) shall not be less than 0.5 times the height of the oblique reinforced concrete beam 4 and shall not be less than 500 mm.

[0031] A plurality of air holes 23 need to be provided in the annular steel corbel ring plate 21 (upper and lower flange plates) along the annular direction to ensure air permeability during concrete pouring and release hydration heat to make the concrete more compact. The diameter of the air holes 23 is generally 50 mm.

[0032] At the corresponding position of the annular steel corbel ring plate 21 (upper and lower flange plates), the circular tube column 1 needs to be provided with an inner partition plate 5, the thickness of the inner partition plate 5 is the same as the thickness of the annular steel corbel ring plate 21 (upper and lower flange plates), and each inner partition plate 5 needs to be provided with a casting hole 6 to ensure that the concrete in the circular tube column 1 is poured through, and the diameter of the casting hole 6 on the inner partition plate 5 is compatible with the diameter of the round steel pipe, and the diameter of the casting hole 6 shall not be less than 250 mm.

[0033] like Figure 2 and Figure 4 As shown, the circumferential reinforced concrete beam 3 includes the concrete beam itself and the circumferential upper longitudinal reinforcement 31, the circumferential lower longitudinal reinforcement 32, the circumferential inner waist reinforcement 33, the circumferential outer waist reinforcement 34 and the circumferential stirrups 35. Among them, the circumferential upper longitudinal reinforcement 31 and the circumferential lower longitudinal reinforcement 32 are arranged circumferentially along the circular tube column 1, and serve as the main force-bearing steel bars of the circumferential reinforced concrete beam 4, mainly bearing the bending moment and shear force transmitted by the oblique reinforced concrete beam 4, to ensure that no bending and shear failure occurs.

[0034] The inner circumferential waist reinforcement 33 and the outer circumferential waist reinforcement 34 are also arranged circumferentially along the circular tube column 1. As the lateral force-bearing steel bars of the circular reinforced concrete beam 3, they can prevent the cracking of the circular reinforced concrete beam structure, and at the same time increase the bonding strength between the circular reinforced concrete beam 3 and the circular tube column 1, so that they can better share the load.

[0035] The circumferential stirrups 35 surround the circumferential upper longitudinal reinforcement 31, the circumferential lower longitudinal reinforcement 32, the circumferential inner waist reinforcement 33, and the circumferential outer waist reinforcement 34 to form a closed rectangular shape. At the same time, they serve as the main force-bearing steel bars of the circumferential reinforced concrete beam 3, mainly bearing the shear force transmitted from the oblique reinforced concrete beam 4 to ensure that shear failure does not occur.

[0036] like Figure 2 and Figure 4As shown, the oblique reinforced concrete beam 4 includes the concrete beam itself and the upper longitudinal reinforcement 41, the lower longitudinal reinforcement 42, the side waist reinforcement 43 and the beam stirrup 44. Among them, the upper longitudinal reinforcement 41 of the beam can be a single row of steel bars or a double row of steel bars, which can be anchored in the annular reinforced concrete beam 3 in the form of steel bar bending anchors. The total length of the steel bar bending anchors shall not be less than LaE (seismic anchoring length), and the bending section length shall not be less than 15d (steel bar diameter).

[0037] The lower longitudinal reinforcement 42 of the beam can be a single row of steel bars or a double row of steel bars, and can be welded to the annular steel corbel ring plate 21 (lower flange plate) by steel bar welding. The total length of the steel bar welding must meet the following requirements: single-sided welding must not be less than 10d (steel bar diameter), and double-sided welding must not be less than 5d (steel bar diameter). If the lower longitudinal reinforcement 42 of the oblique reinforced concrete beam 4 is a double row of steel bars, in order to ensure that there is space for the lower longitudinal reinforcement 42 of the beam to be welded to the annular steel corbel ring plate 21 (lower flange plate), at the intersection of the oblique reinforced concrete beam 4 and the annular reinforced concrete beam 3, the bottom of the oblique reinforced concrete beam 4 is at least 50mm lower than the bottom of the annular reinforced concrete beam 3.

[0038] The side waist reinforcement 43 of the beam is also anchored in the annular reinforced concrete beam 3 by means of steel bar bending anchors. The total length of the steel bar bending anchors shall not be less than LaE (seismic anchorage length), and the length of the bending section shall not be less than 15d (steel bar diameter).

[0039] The annular reinforced concrete beam 3 wraps around the annular steel corbel 2, and the annular steel corbel 2 is welded and fixed to the circular tube column 1. Therefore, the above three jointly bear the load transmitted by the oblique reinforced concrete beam 4. Therefore, the circular tube column 1, the annular steel corbel 2, the annular reinforced concrete beam 3, and the oblique reinforced concrete beam 4 together form an overall connection structure with good structural force and convenient construction, constituting an oblique reinforced concrete beam and circular tube column connection structure of the utility model.

[0040] In the utility model, the upper longitudinal reinforcement 41 and the side waist reinforcement 43 of the oblique reinforced concrete beam 4 are bent and anchored by steel bars, avoiding the need to open holes on the circular tube column 1, so that the strength and rigidity of the circular tube column 1 itself will not be weakened, the bearing capacity of the circular tube column 1 will not be affected, and there will be no construction quality problems such as large deviation of the steel bar perforation position. The steel bar bending and anchoring construction is convenient and the construction quality is easy to ensure. The lower longitudinal reinforcement 42 of the oblique reinforced concrete beam 4 is mainly welded to the lower flange plate of the annular steel corbel 2 by steel bar welding. The annular steel corbel 2 has a large ring plate width and a large welding space, which helps to improve the welding quality, reduce the construction difficulty, and ensure the construction quality. The upper longitudinal reinforcement 41, the side waist reinforcement 43 and the lower longitudinal reinforcement 42 of the oblique reinforced concrete beam 4 are connected and fixed mainly by bending and anchoring the steel bars and welding the steel bars, which not only avoids opening holes on the round tube column to weaken the cross section, but also avoids the quality problems such as limited welding space for welding the steel bar connection sleeve on the round tube column and the oblique intersection of the steel bar connection sleeve and the round tube column, which leads to the inability to ensure the welding quality, and effectively avoids the construction quality problems such as large position deviation when the steel bar is punched and the steel bar connection sleeve is tightened on site, which leads to inaccurate alignment. The connection structure of the utility model is safe and reliable, has good durability, fast construction speed, low installation difficulty, and easy to ensure construction quality.

[0041] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be understood by anyone familiar with the technology within the technical scope disclosed by the present invention should be included in the scope of the present invention.

Claims

1. A connection structure of an oblique reinforced concrete beam and a circular tube column, characterized in that: It comprises a circular tube column, an annular steel corbel welded and fixed on the outer circumference of the circular tube column, an annular reinforced concrete beam arranged along the circular tube column and wrapping the annular steel corbel, and an oblique reinforced concrete beam connected and fixed to the annular steel corbel and the annular reinforced concrete beam; The circular tubular column, annular steel corbel and annular reinforced concrete beam jointly bear the load transmitted by the oblique reinforced concrete beam.

2. The oblique reinforced concrete beam and circular tube column connection structure according to claim 1 is characterized in that: The annular steel corbel is composed of two annular steel corbel ring plates distributed up and down and a plurality of annular steel corbel ribs connected between the two annular steel corbel ring plates and arranged along the annular direction of the circular tube column; The annular steel corbel plate is provided with ventilation holes, and the circular tube column is provided with inner partitions at positions corresponding to the annular steel corbel plate. Each inner partition is provided with a casting hole to ensure that the concrete in the circular tube column is cast through.

3. The oblique reinforced concrete beam and circular tube column connection structure according to claim 1 is characterized in that: The annular reinforced concrete beam includes concrete itself and annular upper longitudinal reinforcement, annular lower longitudinal reinforcement, annular inner waist reinforcement, annular outer waist reinforcement and annular stirrups; The circumferential upper longitudinal reinforcement, circumferential lower longitudinal reinforcement, circumferential inner waist reinforcement and circumferential outer waist reinforcement are all circumferentially arranged along the circular tube column, and the circumferential hoop reinforcement surrounds the circumferential upper longitudinal reinforcement, circumferential lower longitudinal reinforcement, circumferential inner waist reinforcement and circumferential outer waist reinforcement to form a closed rectangular shape.

4. The oblique reinforced concrete beam and circular tube column connection structure according to claim 1 is characterized in that: The oblique reinforced concrete beam includes the concrete beam itself, the upper longitudinal reinforcement of the beam, the lower longitudinal reinforcement of the beam, the side waist reinforcement of the beam and the stirrups of the beam; The upper longitudinal reinforcement of the beam and the side waist reinforcement of the beam are anchored in the annular reinforced concrete beam by means of steel bar bending anchors, and the lower longitudinal reinforcement of the beam is welded to the annular steel corbel ring plate below the annular steel corbel by means of steel bar welding.

5. The oblique reinforced concrete beam and circular tube column connection structure according to claim 1 is characterized in that: The circular tube column is poured with concrete inside a vertical circular steel tube, and bolts are arranged on the inner wall of the circular steel tube.

6. The oblique reinforced concrete beam and circular tube column connection structure according to claim 2 is characterized in that: The thickness of the annular steel corbel ring plate is not less than 25 mm, the thickness of the annular steel corbel rib plate is not less than 0.8 times the thickness of the annular steel corbel ring plate, and the width of the annular steel corbel ring plate is not less than 0.5 times the height of the oblique reinforced concrete beam and not less than 500 mm.

7. The oblique reinforced concrete beam and circular tube column connection structure according to claim 1 is characterized in that: At the intersection of the oblique reinforced concrete beam and the annular reinforced concrete beam, the bottom of the oblique reinforced concrete beam is at least 50 mm lower than the bottom of the annular reinforced concrete beam.

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