High energy consumption steel tube concrete beam-column node structure and construction method

Abstract

The present invention relates to a high-energy-consumption steel tube concrete beam-column node structure and a construction method. The cross-sectional area of ​​the steel tube concrete structure is small. If steel tube concrete beams and columns are used at the same time, the connection node area is small, stress concentration is easy, and reliability is poor. This structure includes a steel tube concrete column and a hollow steel tube concrete beam. One end of the hollow steel tube concrete beam is connected to the side wall of the steel tube concrete column; the steel tube concrete column includes a vertical square tube, and concrete is poured in the vertical square tube; the hollow steel tube concrete beam includes an inner square tube and an outer square tube, and concrete is poured between the inner square tube and the outer square tube; the side wall of the vertical square tube is provided with a shear nail, one end of which is fixed to the near-beam wall of the vertical square tube, and the other end is inserted between the inner square tube and the outer square tube and buried in the concrete between the inner square tube and the outer square tube. This structure can effectively enhance the stress strength of the steel tube concrete column-beam node, and is equipped with a replaceable low-yield point steel plate to enhance its own energy consumption and facilitate installation and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and in particular to a high-energy-consumption steel tube concrete beam-column node structure and a construction method. Background Art

[0002] A concrete-filled steel tube structure refers to a structural member formed by filling a steel tube with concrete. The steel tube and concrete jointly bear external loads. Concrete has high compressive strength but weak bending resistance. Steel tubes have strong bending resistance and good elastic-plastic properties, but are prone to instability and loss of axial compressive resistance when under pressure. The concrete-filled steel tube structure, which combines the two, can leverage the structural advantages of both steel tubes and concrete, overcome their respective performance deficiencies, and restrain each other during the load-bearing process. The steel tube's restraint on the concrete places the concrete under three-dimensional compression, while the concrete enhances the steel tube's ability to resist buckling, significantly increasing its load-bearing capacity.

[0003] The use of concrete-filled steel tubular columns in beam-column structural systems is currently common in engineering practice. However, these beam-column joints are typically those between concrete-filled steel tubular columns and steel or concrete beams, with few examples of concrete-filled steel tubular columns connecting to concrete-filled steel tubular beams. This is because concrete-filled steel tubular structures have a small cross-sectional area. If both concrete-filled steel tubular beams and columns are used, the connection area is small, which can easily lead to stress concentration, poor reliability, and poor energy performance, affecting the stability of the entire structural system. Therefore, if both concrete-filled steel tubular beams and columns are used, a reasonable and safe structural solution must be proposed to address the reliability issues of the connection joints. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-energy consumption steel tube concrete beam-column node structure and construction method to realize the connection between steel tube concrete columns and steel tube concrete beams, and overcome the problems of stress concentration, poor reliability, poor energy consumption performance, etc. caused by the small connection area of ​​the connection node.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A high-energy-dissipation steel tube concrete beam-column node structure, comprising a vertical steel tube concrete column and a horizontal hollow steel tube concrete beam, one end of the hollow steel tube concrete beam being connected to the side wall of the steel tube concrete column;

[0007] The steel tube concrete column includes a vertical square tube, and concrete is poured into the vertical square tube;

[0008] The hollow steel tube concrete beam comprises an inner square tube and an outer square tube, and concrete is poured between the inner square tube and the outer square tube;

[0009] The side wall of the vertical square tube is provided with a shear nail, one end of the shear nail is fixed to the near-beam wall of the vertical square tube, and the other end of the shear nail is inserted between the inner square tube and the outer square tube and buried in the concrete between the inner square tube and the outer square tube.

[0010] Furthermore, two reinforcing plates are provided on the near-beam wall of the vertical square tube. The two reinforcing plates are located on the upper and lower sides of the outer square tube and are fixed to the upper or lower wall of the outer square tube by high-strength bolts.

[0011] Furthermore, two oblique low-yield point steel plates are provided on the near-beam wall of the vertical square tube, and the two low-yield point steel plates are located on the upper and lower sides of the outer square tube;

[0012] One end of the low yield point steel plate is fixed to the near beam wall of the vertical square tube through high strength bolts, and the other end of the low yield point steel plate is fixed to the upper wall or lower wall of the outer square tube through high strength bolts.

[0013] Furthermore, a bellows is provided at the inner bottom of the inner square tube, the bellows is arranged along the length direction of the inner square tube, and the bellows is fixed to the inner square tube by a bellows clamp;

[0014] A prestressed steel bundle is arranged inside the corrugated tube; one end of the prestressed steel bundle passes through the vertical square tube, and the end is anchored to the far beam wall of the vertical square tube through a prestressed anchor; the other end of the prestressed steel bundle passes through the anchor plate arranged at the end of the inner square tube and is anchored by a prestressed anchor.

[0015] Furthermore, the front and rear walls of the vertical square tube are provided with a clamping plate, and the end of the clamping plate near the beam is provided with an inner convex portion;

[0016] The clamping plate is fixed to the front wall or rear wall of the vertical square tube through a threaded column, and the inner convex portion is fixed to the front wall or rear wall of the outer square tube through a high-strength bolt.

[0017] Furthermore, a bolt sleeve assembly is provided on the near-beam wall of the vertical square tube, and the bolt sleeve assembly includes a square frame, on which a horizontal bolt sleeve is provided, and the end of the bolt sleeve is bent to form a bolt sleeve reversing interface;

[0018] The square frame is located between the inner square tube and the outer square tube, and the ends of the high-strength bolts on the reinforcing plate and the ends of the high-strength bolts on the clamping plate are inserted into the bolt sleeve reversing interface.

[0019] Furthermore, the front and rear walls of the vertical square tube are provided with lateral supports, and the lateral supports are located below the splint and support the splint.

[0020] Furthermore, the lateral support is U-shaped and surrounds the vertical square tube;

[0021] The lateral support comprises a U-shaped upper frame and a U-shaped lower frame, wherein the upper frame and the lower frame are connected by vertical ribs;

[0022] The ends of the upper frame and the lower frame are provided with connecting steel plates, and the connecting steel plates of the front and rear lateral supports are connected by high-strength bolts.

[0023] In another aspect, a method for constructing the structure as described is provided, the method comprising:

[0024] Shear studs and reinforcement plates are welded on the side of the vertical square tube of the steel tube concrete column. The reinforcement plates are located on the upper and lower sides of the shear studs. The clamping plates on both sides are connected to the vertical square tube of the steel tube concrete column through threaded columns.

[0025] Place the bolt sleeve assembly on the relative position of the inner square tube of the hollow steel tube concrete beam, then place the inner steel tube of the hollow steel tube concrete beam inside the shear nail, then place the outer steel tube of the hollow steel tube concrete beam, and finally pour concrete between the inner and outer steel tubes;

[0026] The high-strength bolts are connected to the bolt sleeve assembly by passing through the inner convex part of the splint and the reserved bolt holes corresponding to the reinforcement plate and the hollow steel tube concrete beam;

[0027] A pair of lateral supports are placed at the bottom of the splint and connected by high-strength bolts;

[0028] The prestressed steel tendons pass through the corrugated pipe and the reserved holes of the steel tube concrete column and then are anchored;

[0029] The low yield point steel plate is connected to the vertical square tube of the steel tube concrete column and the outer square tube of the hollow steel tube concrete beam respectively through high strength bolts;

[0030] Pour concrete into vertical square tubes.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The high-energy-dissipation concrete-filled steel tubular beam-column joint structure provided by this invention effectively enhances the strength of the joint connecting the concrete-filled steel tubular column and beam. It is equipped with a replaceable low-yield point steel plate, which allows the low-yield point steel to yield first during an earthquake and fully dissipate energy, thereby reducing damage to the main body of the joint. Furthermore, the low-yield point steel can be replaced after the earthquake, facilitating installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0034] Figure 1 It is a three-dimensional structural diagram of the high-energy-consuming steel tube concrete beam-column node structure.

[0035] Figure 2 It is a three-dimensional structural diagram of a hollow steel tube concrete beam.

[0036] Figure 3 This is a three-dimensional structural diagram of a concrete-filled steel tube column.

[0037] Figure 4 It is the elevation structural diagram of the high energy consumption steel tube concrete beam-column node structure.

[0038] Figure 5 It is a three-dimensional structural diagram of the bolt sleeve assembly.

[0039] Figure 6 It is a three-dimensional structural diagram of the lateral support.

[0040] The symbols in the figure are:

[0041] 1-Concrete-filled steel tube column, 2-Hollow concrete-filled steel tube beam, 3-Shear nail, 4-Reinforcement plate, 5-Plywood, 6-High-strength bolt, 7-Prestressed steel strand, 8-Lateral support, 9-Bellows, 10-Bolt sleeve assembly, 11-Low yield point steel plate, 12-Prestressed anchor, 13-Threaded column, 14-Bellows clamp, 15-Square frame, 16-Bolt sleeve, 17-Bolt sleeve reversing interface, 18-Upper frame, 19-Lower frame, 20-Connecting steel plate, 21-Rib plate. DETAILED DESCRIPTION

[0042] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0043] In the description of this patent, it should be understood that the terms "upper", "lower", "front", "back", "near", "far", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0044] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "disposed" should be understood broadly. For example, they can refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0045] like Figure 1 The present invention provides a high-energy-consumption steel tube concrete beam-column node structure, which is a connection node between a vertical steel tube concrete column 1 and a horizontal hollow steel tube concrete beam 2. One end of the hollow steel tube concrete beam 2 is connected to the side wall of the steel tube concrete column 1, and the two are perpendicular to each other. Among them, the steel tube concrete column 1 includes a vertical square tube, and concrete is poured inside the vertical square tube, which is a solid structure; the hollow steel tube concrete beam 2 includes an inner square tube and an outer square tube, and concrete is poured between the inner square tube and the outer square tube, which is a hollow structure. Therefore, this structure is a connection node between two steel tube concrete components, in which the column is a solid column and the beam is a hollow beam. The hollow beam structure is adopted to reduce the dead weight of the beam and make the beam have better bearing capacity.

[0046] like Figure 3 The side wall of the vertical square tube is provided with a shear nail 3, and one end of the shear nail 3 is fixed to the near-beam wall of the vertical square tube, that is, the right wall in the figure. The other end of the shear nail 3 is inserted between the inner square tube and the outer square tube and buried in the concrete between the inner square tube and the outer square tube. The shear nails 3 are arranged in a square shape with equal intervals, and the arrangement area corresponds to the space between the inner square tube and the outer square tube. The diameter of the shear nail 3 needs to be smaller than the width of the gap between the inner square tube and the outer square tube, including the shear nail cap. The shear nail 3 and the concrete in the middle of the hollow steel tube concrete beam 2 are engaged, so that the structure can withstand greater shear force.

[0047] like Figure 1 and Figure 3Two reinforcing plates 4 are also provided near the beam wall of the vertical square tube. These plates 4 are located on the upper and lower sides of the outer square tube and are fixed to the upper or lower wall of the outer square tube via high-strength bolts 6. Corresponding threaded holes are provided on the upper or lower wall of the outer square tube. The vertical distance between the two reinforcing plates 4 is equal to the height of the outer square tube. The reinforcing plates 4 are placed closely to the outer square tube, with their column-side ends welded to the beam wall of the vertical square tube. The reinforcing plates 4 not only connect the concrete-filled steel tube column 1 and the hollow concrete-filled steel tube beam 2, but also limit vertical displacement at the joint.

[0048] like Figure 1 and Figure 4 The vertical square tube is also provided with two oblique low-yield point steel plates 11 near the beam wall, and the two low-yield point steel plates 11 are located on the upper and lower sides of the outer square tube. One end of the low-yield point steel plate 11 is fixed to the vertical square tube near the beam wall by a high-strength bolt 6, and the other end of the low-yield point steel plate 11 is fixed to the upper wall or lower wall of the outer square tube by a high-strength bolt 6. The vertical square tube and the outer square tube are correspondingly provided with threaded holes. The width of the low-yield point steel plate 11 is consistent with that of the outer square tube, and the yield point should be less than 200MPa. The main function of the low-yield point steel plate 11 is to prevent the node structure from being damaged.

[0049] like Figure 2 and Figure 4 A bellows 9 is provided at the inner bottom of the inner square tube. The bellows 9 is arranged along the length direction of the inner square tube and is fixed to the inner square tube by a bellows clamp 14. The bellows clamp 14 is a U-shaped clamp, which is fixed to the inner square tube from the outer periphery of the bellows 9 by high-strength bolts 6. There are multiple bellows clamps 14, which are arranged at equal intervals along the bellows 9. A prestressed steel bundle 7 is provided inside the bellows 9. One end of the prestressed steel bundle 7 passes through the vertical square tube, and the end is anchored to the far beam wall of the vertical square tube by a prestressed anchor 12. The other end of the prestressed steel bundle 7 passes through the vertical anchor plate welded and fixed at the end of the inner square tube and is anchored by the prestressed anchor 12. A reserved hole for passing the prestressed steel bundle 7 is provided on the vertical square tube. The prestressed component can not only increase the bending bearing capacity of the structure, but also increase the shear bearing capacity.

[0050] like Figure 1 and Figure 4 The front and rear walls of the vertical square tube are also provided with clamping plates 5, each with an inner protrusion near the beam end. Clamping plates 5 are secured to the front or rear wall of the vertical square tube via threaded studs 13, while the inner protrusion is secured to the front or rear wall of the outer square tube via high-strength bolts 6. Threaded holes corresponding to the threaded studs 13 are provided in the clamping plates 5 and the front or rear wall of the vertical square tube, while threaded holes corresponding to the high-strength bolts 6 are provided in the inner protrusion and the front or rear wall of the outer square tube.

[0051] like Figure 1 、 Figure 4 and Figure 5The vertical square tube is also provided with a bolt sleeve assembly 10 near the beam wall, which is staggered with the position of the shear studs 3. The bolt sleeve assembly 10 includes a square frame 15, on which horizontal bolt sleeves 16 are provided. The bolt sleeves 16 are arranged in a square shape with equal intervals. The ends of the bolt sleeves 16 are bent to form bolt sleeve reversing interfaces 17, facing the outside of the square frame 15. The square frame 15 is located between the inner square tube and the outer square tube and is welded and fixed to the vertical square tube near the beam wall. The ends of the high-strength bolts 6 on the reinforcing plate 4 and the ends of the high-strength bolts 6 on the splint 5 are inserted into the bolt sleeve reversing interfaces 17. The bolt sleeve assembly 10 can facilitate and strengthen the connection and fixation between the steel tube concrete column 1 and the hollow steel tube concrete beam 2.

[0052] like Figure 1 、 Figure 4 and Figure 6 The front and rear walls of the vertical square tube are provided with lateral supports 8, which are located below the splint 5 and support the splint 5. The lateral supports 8 are U-shaped and surround the vertical square tube. The front and rear lateral supports 8 form a square hoop. The lateral supports 8 include a U-shaped upper frame 18 and a U-shaped lower frame 19. The upper frame 18 and the lower frame 19 are welded together by vertical ribs 21. The ribs 21 are in the shape of an inverted trapezoid or an arc and are arranged at equal intervals. Connecting steel plates 20 are welded to the ends of the upper frame 18 and the lower frame 19. The connecting steel plates 20 of the front and rear lateral supports 8 are connected by high-strength bolts 6. Corresponding threaded holes are provided on the connecting steel plates 20. The upper side width of the upper frame 18 is equal to the upper side width of the rib 14, and the upper side width of the lower frame 19 is equal to the lower side width of the rib 14. The main function of the lateral supports 8 is to prevent the splint 5 from being damaged and failing, which is equivalent to preventing the node from being damaged and failing.

[0053] The specific construction method of the above node structure includes:

[0054] S1: Weld shear studs 3 and reinforcement plates 4 on the side of the vertical square tube of the concrete-filled steel tube column 1. The reinforcement plates 4 are located on the upper and lower sides of the shear studs 3. The clamping plates 5 on both sides are connected to the vertical square tube of the concrete-filled steel tube column 1 through threaded columns 13;

[0055] S2: Place the bolt sleeve assembly 10 at a relative position on the inner square tube of the hollow steel tube concrete beam 2, then place the inner steel tube of the hollow steel tube concrete beam 2 inside the shear stud 3, then place the outer steel tube of the hollow steel tube concrete beam 2, and finally pour concrete between the inner and outer steel tubes;

[0056] S3: The high-strength bolt 6 passes through the inner convex part of the clamping plate 5 and the reserved bolt holes corresponding to the reinforcing plate 4 and the hollow steel tube concrete beam 2 and is connected to the bolt sleeve assembly 10;

[0057] S4: A pair of lateral supports 8 are placed under the clamping plate 5 and connected by high-strength bolts 6;

[0058] S5: The prestressed steel tendon 7 passes through the corrugated tube 9 and the reserved hole of the steel tube concrete column, and then is anchored;

[0059] S6: Connect the low yield point steel plate 11 to the vertical square tube of the concrete-filled steel tube column 1 and the outer square tube of the hollow concrete-filled steel tube beam 2 respectively through high-strength bolts 6;

[0060] S7: Pour concrete into the vertical square tube.

[0061] The above construction method realizes partial dry connection of beam-column nodes, basically eliminates wet concrete operation on site, is beneficial to environmental protection, avoids construction disturbance to residents, and has little impact on surrounding life and work. On-site construction is convenient, and only construction processes such as component lifting, bolt connection, grouting, and superimposed layer pouring need to be completed to avoid steel bar collision in the core area of ​​the node, while improving its pouring density. The application of beam-column design technology avoids the time of traditional cast-in-place structure formwork, formwork removal, and concrete curing, greatly improving construction efficiency, shortening the construction cycle, and reducing material usage and energy consumption. The beam and column components are all steel surfaces with smooth surfaces, good appearance, and accurate and precise dimensions. It can significantly improve the construction quality of beam-column connections and ensure the bearing capacity of the nodes and the overall safety of the structure.

[0062] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. High energy dissipation steel tube concrete beam-column node structure, characterized by: The structure comprises a vertical steel tube concrete column (1) and a horizontal hollow steel tube concrete beam (2), wherein one end of the hollow steel tube concrete beam (2) is connected to the side wall of the steel tube concrete column (1); The steel tube concrete column (1) comprises a vertical square tube, and concrete is poured into the vertical square tube; The hollow steel tube concrete beam (2) comprises an inner square tube and an outer square tube, and concrete is poured between the inner square tube and the outer square tube; The side wall of the vertical square tube is provided with a shear nail (3), one end of the shear nail (3) is fixed to the near-beam wall of the vertical square tube, and the other end of the shear nail (3) is inserted between the inner square tube and the outer square tube and buried in the concrete between the inner square tube and the outer square tube.

2. The structure according to claim 1, characterized in that: Two reinforcing plates (4) are provided on the near-beam wall of the vertical square tube. The two reinforcing plates (4) are located on the upper and lower sides of the outer square tube and are fixed to the upper wall or the lower wall of the outer square tube by high-strength bolts (6).

3. The structure according to claim 2, characterized in that: Two oblique low-yield point steel plates (11) are provided on the near-beam wall of the vertical square tube, and the two low-yield point steel plates (11) are located on the upper and lower sides of the outer square tube; One end of the low-yield point steel plate (11) is fixed to the near-beam wall of the vertical square tube via a high-strength bolt (6), and the other end of the low-yield point steel plate (11) is fixed to the upper wall or lower wall of the outer square tube via a high-strength bolt (6).

4. The structure according to claim 3, characterized in that: A bellows (9) is provided at the inner bottom of the inner square tube, the bellows (9) is arranged along the length direction of the inner square tube, and the bellows (9) is fixed to the inner square tube by a bellows clamp (14); A prestressed steel bundle (7) is provided inside the corrugated tube (9); one end of the prestressed steel bundle (7) passes through the vertical square tube, and the end is anchored to the far beam wall of the vertical square tube via a prestressed anchor (12); the other end of the prestressed steel bundle (7) passes through an anchor plate provided at the end of the inner square tube and is anchored via the prestressed anchor (12).

5. The structure according to claim 4, characterized in that: The front and rear walls of the vertical square tube are provided with a clamping plate (5), and the end of the clamping plate (5) near the beam is provided with an inner convex portion; The clamping plate (5) is fixed to the front wall or rear wall of the vertical square tube via a threaded column (13), and the inner convex portion is fixed to the front wall or rear wall of the outer square tube via a high-strength bolt (6).

6. The structure according to claim 5, characterized in that: A bolt sleeve assembly (10) is provided on the near-beam wall of the vertical square tube, and the bolt sleeve assembly (10) comprises a square frame (15), a horizontal bolt sleeve (16) is provided on the square frame (15), and the end of the bolt sleeve (16) is bent to form a bolt sleeve reversing interface (17); The square frame (15) is located between the inner square tube and the outer square tube, and the ends of the high-strength bolts (6) on the reinforcing plate (4) and the ends of the high-strength bolts (6) on the clamping plate (5) are inserted into the bolt sleeve reversing interface (17).

7. The structure according to claim 6, characterized in that: The front and rear walls of the vertical square tube are provided with lateral supports (8), and the lateral supports (8) are located below the splint (5) and support the splint (5).

8. The structure according to claim 7, characterized in that: The lateral support (8) is U-shaped and surrounds the vertical square tube; The lateral support (8) comprises a U-shaped upper frame (18) and a U-shaped lower frame (19), wherein the upper frame (18) and the lower frame (19) are connected via vertical ribs (21); Connecting steel plates (20) are provided at the ends of the upper frame (18) and the lower frame (19), and the connecting steel plates (20) of the front and rear lateral supports (8) are connected by high-strength bolts (6).

9. The construction method of the structure according to claim 8, characterized in that: The method comprises: Shear studs (3) and reinforcement plates (4) are welded to the side surfaces of the vertical square tube of the steel tube concrete column (1), the reinforcement plates (4) are located on the upper and lower sides of the shear studs (3), and the clamping plates (5) on both sides are connected to the vertical square tube of the steel tube concrete column (1) through threaded columns (13); Place the bolt sleeve assembly (10) at a relative position on the inner square tube of the hollow steel tube concrete beam (2), then place the inner steel tube of the hollow steel tube concrete beam (2) inside the shear nail (3), then place the outer steel tube of the hollow steel tube concrete beam (2), and finally pour concrete between the inner and outer steel tubes; The high-strength bolts (6) pass through the inner convex portion of the splint (5) and the reserved bolt holes corresponding to the reinforcing plate (4) and the hollow steel tube concrete beam (2) to be connected to the bolt sleeve assembly (10); A pair of lateral supports (8) are placed on the lower part of the clamping plate (5) and connected by high-strength bolts (6); The prestressed steel strand (7) passes through the corrugated pipe (9) and the reserved hole of the steel tube concrete column and is then anchored; Connecting the low yield point steel plate (11) to the vertical square tube of the steel tube concrete column (1) and the outer square tube of the hollow steel tube concrete beam (2) respectively through high-strength bolts (6); Pour concrete into the vertical square tube.

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