Square steel tube confined concrete column-RC beam connecting joint

Abstract

The utility model belongs to the technical field of building structural member connection, and discloses a square steel tube confined concrete column-RC beam connection node which comprises a connection node body used for connecting a steel tube confined concrete column and a reinforced concrete beam. The connecting joint comprises a joint area steel pipe, and the reinforced concrete beam penetrates through the joint area steel pipe and is fixedly connected with the joint area steel pipe. The steel pipe confined concrete column comprises an upper column and a lower column; a connecting assembly is arranged in the reinforced concrete beam, penetrates through the joint area steel pipe and is fixedly connected with the joint area steel pipe. The node area steel pipe is filled with concrete. The utility model has the advantages of convenient construction, reliable node performance, high material utilization rate, less steel consumption and excellent anti-seismic property, can effectively delay the local buckling of the square steel tube, enhances the integrity of the concrete, enhances the restraining effect on the core concrete, improves the economic benefit, and solves the problems of difficult construction, complex node and the like in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model belongs to building structure component connection technical field especially relates to a square steel pipe confined concrete column - RC beam connecting joint. BACKGROUND

[0002] In the prior art, the connection of the square steel pipe confined concrete column and the reinforced concrete beam is a common structure form, which is suitable for high-rise buildings, bridges and other engineering fields and can meet the structural connection requirements under complex stress conditions.

[0003] However, when the square steel pipe confined concrete column is used, the core concrete is unevenly constrained, and the steel pipe is prone to local buckling. The node connection of the square steel pipe confined concrete column and the reinforced concrete beam is a key problem in the design of the steel pipe confined concrete structure, and the effectiveness of the connecting node directly affects the stiffness, stability and bearing capacity of the overall structure, and also affects the on-site construction difficulty and construction progress. The existing steel pipe confined concrete node area arrangement of reinforcement (including beam column longitudinal reinforcement and stirrup) has the problem that the node area reinforcement is dense and the beam longitudinal reinforcement is difficult to penetrate the node area, which directly increases the construction difficulty and affects the on-site construction progress.

[0004] Therefore, it is necessary to design a square steel pipe confined concrete column-RC beam connecting joint to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the utility model provides a square steel pipe confined concrete column-RC beam connecting joint.

[0006] To achieve the above purpose, the utility model provides a square steel pipe confined concrete column-RC beam connecting joint, which comprises a connecting joint for connecting the steel pipe confined concrete column and the reinforced concrete beam.

[0007] The connecting joint comprises a node area steel pipe, the node area steel pipe is arranged on the steel pipe confined concrete column, and the reinforced concrete beam penetrates through the node area steel pipe and is fixedly connected with the node area steel pipe.

[0008] The steel pipe confined concrete column comprises an upper column and a lower column arranged correspondingly, the upper column is arranged above the node area steel pipe, and the lower column is arranged below the node area steel pipe.

[0009] The reinforced concrete beam is provided with a connecting assembly, the connecting assembly penetrates through the node area steel pipe and is fixedly connected with the node area steel pipe.

[0010] The node area steel pipe is filled with concrete.

[0011] Preferably, the upper column comprises an upper column steel pipe, a bottom end of the upper column steel pipe is correspondingly arranged with a gap at an upper end of the node area steel pipe, and concrete in the node area steel pipe is combined with concrete in the upper column steel pipe.

[0012] Preferably, the lower column comprises a lower column steel pipe, a top end of the lower column steel pipe is correspondingly arranged with a gap at a lower end of the node area steel pipe, and concrete in the node area steel pipe is combined with concrete in the lower column steel pipe.

[0013] Preferably, an upper construction joint is arranged between the upper column steel pipe and the node area steel pipe, and a lower construction joint is arranged between the lower column steel pipe and the node area steel pipe.

[0014] Preferably, the connecting assembly comprises a shear web vertically penetrating the node area steel pipe, the shear web is welded and fixed with the node area steel pipe, and two ends of the shear web protrude from the node area steel pipe and are embedded in the reinforced concrete beam.

[0015] Preferably, flanges are respectively vertically fixed on upper and lower sides of the part of the shear web protruding from the node area steel pipe, one end of the flange abuts and is fixed with a side wall of the node area steel pipe, and the other end of the flange is flush with an end of the shear web and is embedded in the reinforced concrete beam.

[0016] Preferably, the node area steel pipe is provided with second holes in opposite side walls thereof, first holes vertically communicating with the second holes are respectively arranged on upper and lower sides of each second hole, the shear web penetrates the second holes, the flange is flush with a lower end of the first hole, and an edge of the reinforced concrete beam is flush with an edge of the first hole away from the edge of the second hole.

[0017] Preferably, a plurality of inclined pull ribs are longitudinally arranged at four corners of the node area steel pipe, two sides of each inclined pull rib are respectively fixed with adjacent edges of the node area steel pipe, and a grouting through hole is arranged on each inclined pull rib.

[0018] Preferably, outer steel plates adapted to the shear web are welded and fixed on the side walls of the node area steel pipe, and the two outer steel plates are arranged in parallel with the shear web.

[0019] Compared with the prior art, the utility model has the advantages and technical effects that: the utility model discloses a square steel pipe confined concrete column-RC beam connecting joint and construction scheme, is used to connect steel pipe confined concrete column and reinforced concrete beam, strengthens the core area node steel pipe to the concrete in the inside and produces effective restraint, improves the node intensity, and material utilization rate is higher, and the steel consumption is less, and the construction is convenient, the node area steel pipe is in the middle part and is provided with the connecting assembly that is connected with the concrete column, improves the problem that the core part in the node middle part is easy to destroy, strengthens structural stability, improves the rigidity of steel pipe confined concrete node, makes the node integrity enhancement, and the seismic performance is superior, and improves the shearing force and axial compression bearing capacity, realizes the purpose of " strong node weak component ", the connecting assembly is embedded in the concrete column in the two ends of the node area steel pipe, not only can effectively make the node area plastic hinge on the reinforced concrete beam and move to the beam two ends outside, reaches the purpose of " strong column weak beam ", and also helps to enhance the bonding strength of the connecting interface of the node area steel pipe and the reinforced concrete beam, reduces the emptying and relative slip amount of the steel and concrete interface, and is favorable for beam shear force transmission, improves the shearing bearing capacity of the node, the layout of the open hole inclined rib in the four corners of the node area steel pipe can effectively delay the local buckling of the square steel pipe, the open hole inclined rib not only restrains the steel pipe and the concrete, but also bears the axial load together, compared with other stiffening rib square steel pipe confined concrete columns, the inclined rib square steel pipe confined concrete column has higher strength, ductility and energy dissipation capacity under the same stiffness ratio, the open hole of the inclined rib is favorable for concrete pouring, ramming, and makes the integrity of the concrete stronger, the middle part of the node area steel pipe is " weak area ", and two outer steel plates are arranged on the outside of the node area steel pipe and are connected with the node area steel pipe, improve the strength of the " weak area " steel pipe structure, the middle part stiffness of the node area steel pipe increases, not only effectively alleviates the local buckling of the steel pipe, but also avoids the area that the node area steel pipe has relatively large stress concentration, makes the structure better to play performance.

[0020] The utility model discloses construction convenient, node performance reliable, material utilization rate is high, steel consumption is less, and the seismic performance is superior, can effectively delay the local buckling of the square steel pipe, make the integrity of the concrete stronger, and strengthen the restraint effect to the core concrete, improve the economic benefit, and solve the construction difficulty, node complex and other problems in the prior art. ACCURACY OF DRAWINGS

[0021] The drawings constituting a part of this application are used to provide further understanding of the application, and the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation to the application.

[0022] Figure 1 It is the beam column node structure schematic diagram of the utility model;

[0023] Figure 2 It is the beam column node steel structure part schematic diagram of the utility model.

[0024] Figure 3 This is a schematic diagram of the steel pipe structure in the node area of ​​this utility model;

[0025] Figure 4 This is a cross-sectional view of the steel pipe structure in the node area of ​​this utility model;

[0026] Figure 5 This is a schematic diagram of the steel pipe in the node area of ​​this utility model;

[0027] Figure 6 This is a schematic diagram of the shear-resistant web and flange of this utility model;

[0028] Figure 7 This is a schematic diagram of the perforated inclined tie rib of this utility model;

[0029] Figure 8 This is a schematic diagram of the outer steel plate of this utility model;

[0030] Figure 9 This is a cross-sectional view of the stress cloud diagram of a steel structure in the nodal region of a novel node under yielding conditions.

[0031] Figure 10 To standardize the front view of the stress cloud diagram of the steel pipe in the node area when the node fails;

[0032] Figure 11 To standardize the top view of the stress cloud diagram of the steel pipe in the node area when the node fails;

[0033] Figure 12 This is a front view of the stress cloud diagram of the steel structure in the node area when the new type of node fails.

[0034] Figure 13 This is a top view of the stress cloud diagram of the steel structure in the node area when the new type of node fails.

[0035] Figure 14 Finite element simulation cloud map to standardize the failure mode of concrete nodes;

[0036] Figure 15 To standardize the finite element simulation cloud diagram of the equivalent plastic strain of concrete at the joint;

[0037] Figure 16 Finite element simulation cloud map of the failure mode of novel nodal concrete;

[0038] Figure 17 Finite element simulation cloud map of equivalent plastic strain in concrete at novel nodes.

[0039] In the figure: 1, upper column steel pipe; 2, node area steel pipe; 3, outer steel plate; 4, lower column steel pipe; 5, concrete beam; 7, flange; 8, shear web; 10, inclined pull rib; 11, grouting through hole; 12, first hole; 13, second hole; 61, upper construction joint; 62, lower construction joint; 91, beam longitudinal reinforcement; 92, beam stirrup. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0042] Referring to Figures 1-17 The embodiment provides a square steel pipe confined concrete column-RC beam connecting joint, which comprises a connecting joint for connecting a steel pipe confined concrete column and a reinforced concrete beam 5;

[0043] The connecting joint comprises a node area steel pipe 2, the node area steel pipe 2 is arranged on the steel pipe confined concrete column, and the reinforced concrete beam 5 passes through the node area steel pipe 2 and is fixedly connected with the node area steel pipe 2;

[0044] The steel pipe confined concrete column comprises correspondingly arranged upper columns and lower columns, the upper columns are arranged above the node area steel pipe 2, and the lower columns are arranged below the node area steel pipe 2;

[0045] The reinforced concrete beam 5 is provided with a connecting assembly, the connecting assembly passes through the node area steel pipe 2 and is fixedly connected with the node area steel pipe 2;

[0046] The node area steel pipe 2 is filled with concrete.

[0047] The utility model discloses a square steel pipe confined concrete column-RC beam connecting joint for connecting steel pipe confined concrete column and reinforced concrete beam 5, has strengthened the core area node steel pipe to the concrete inside produces effective restraint, has improved the node intensity, and material utilization is higher, and the steel consumption is less, and the construction is convenient, the node area steel pipe 2 inside middle part is provided with the connecting assembly that is connected with the concrete column, improves the problem that the node middle core part is easy to destroy, strengthens structural stability, improves the rigidity of steel pipe confined concrete node, makes the node integrity enhancement, and the seismic performance is superior, and improves the shearing force and axial compression bearing capacity, realizes the purpose of " strong node weak component", the connecting assembly penetrates the both ends of node area steel pipe 2 and embeds in the concrete column, not only can effectively make the node area plastic hinge on reinforced concrete beam 5 and move to the beam both ends outside, reaches the purpose of " strong column weak beam", and also helps to enhance the bonding strength of steel pipe node area and reinforced concrete beam 5 connecting interface, reduces the emptying and relative slip amount of steel and concrete interface, and is favorable for beam shear force transmission, improves the shearing force of node bearing capacity, the utility model construction is convenient, and the node performance is reliable, and material utilization is high, and the steel consumption is less, and the seismic performance is superior, can effectively delay the local buckling of square steel pipe, makes the integrity of concrete stronger, and enhances the restraint effect to core concrete, improves economic benefit, and solves the construction difficulty, node complex etc.

[0048] Further optimization scheme, the upper column includes upper column steel pipe 1, and the bottom end of upper column steel pipe 1 is correspondingly arranged with the upper end of node area steel pipe 2 and is provided with a gap, and the concrete in node area steel pipe 2 is combined with the concrete in upper column steel pipe 1, the lower column includes lower column steel pipe 4, and the top end of lower column steel pipe 4 is correspondingly arranged with the lower end of node area steel pipe 2 and is provided with a gap, and the concrete in node area steel pipe 2 is combined with the concrete in lower column steel pipe 4, upper column steel pipe 1 and lower column steel pipe 4 are welded at the both ends of node area steel pipe 2 respectively, and are fixed in sequence through hoisting positioning, form steel pipe confined concrete column structure, improve strength.

[0049] In an embodiment of the application, the bottom end of the upper column steel pipe 1 and the top end of the node area steel pipe 2 are provided with a construction joint of 10-20mm, and are fixed in sequence through hoisting positioning.

[0050] In an embodiment of the application, the bottom end of the lower column steel pipe 4 and the top end of the node area steel pipe 2 are provided with a construction joint of 10-20mm, and are fixed in sequence through hoisting positioning.

[0051] Further optimization scheme, the upper column steel pipe 1 and the node area steel pipe 2 are provided with the upper construction joint 61, and the lower column steel pipe 4 and the node area steel pipe 2 are provided with the lower construction joint 62. The upper column steel pipe 1 and the bottom end of the node area steel pipe 2 are provided with the upper construction joint 61, so that the positioning and fixing by hoisting are facilitated; the lower column steel pipe 4 and the bottom end of the node area steel pipe 2 are provided with the lower construction joint 62, so that the positioning and fixing by hoisting are facilitated.

[0052] In an embodiment of the present application, the upper column steel pipe 1, the lower column steel pipe 4 and the node area steel pipe 2 are all made by edge welding of rectangular steel plates or cutting of seamless rectangular steel pipes.

[0053] In an embodiment of the present application, the column longitudinal reinforcement and the column stirrup are arranged in the steel pipe confined concrete column to improve the strength.

[0054] In an embodiment of the present application, the beam longitudinal reinforcement 91 and the beam stirrup 92 are arranged in the reinforced concrete beam 5, and the longitudinal reinforcement and the stirrup are arranged at both ends of the beam column.

[0055] In an embodiment of the present application, the range of the upper construction joint 61 and the lower construction joint 62 is designed to be 10-20 mm.

[0056] Further optimization scheme, the connecting assembly comprises a shear web 8 vertically penetrating the node area steel pipe 2, the shear web 8 is welded and fixed with the node area steel pipe 2, and the two ends of the shear web 8 protrude out of the node area steel pipe 2 and are embedded in the reinforced concrete beam 5. The shear web 8 is arranged on the node area steel pipe 2 and is welded and fixed, so that the shear web 8 and the node area steel pipe 2 form an integral structure, which improves the problem that the middle core part is prone to damage after pouring concrete, enhances the structural stability, and improves the rigidity of the steel pipe confined concrete joint. Meanwhile, the two ends of the shear web 8 protrude into the reinforced concrete beams 5 on both sides, so that the reinforced concrete beams 5 and the node area steel pipe 2 form an integral whole, and the structural strength of the integral whole is improved.

[0057] Further optimization scheme, the upper and lower sides of the part of the shear web 8 protruding out of the node area steel pipe 2 are respectively vertically fixed with flanges 7, one end of the flange 7 abuts against and is fixed with the side wall of the node area steel pipe 2, and the other end of the flange 7 is flush with the end of the shear web 8 and is embedded in the reinforced concrete beam 5. In the embodiment, four flanges 7 are designed, which are arranged at the upper and lower ends of the part of the shear web 8 protruding out of the node area steel pipe 2 and are vertically welded. One end of the flange 7 is aligned with the end of the shear web 8, and the other end abuts against the node area steel plate and is welded and fixed. The flange 7 and the shear web 8 form a H-shaped shear structure, which improves the integrity of the flange 7, the shear web 8 and the node area steel pipe 2, improves the connecting strength of the reinforced concrete beam 5 and the node area steel pipe 2, reduces the void and relative slip amount of the steel and concrete interface, and is beneficial to the beam shear force transmission and improves the shear bearing capacity of the joint.

[0058] Further optimization scheme, the side wall of the node area steel pipe 2 opposite to the reinforced concrete beam 5 is respectively provided with a second hole 13, the upper and lower sides of the second hole 13 are respectively provided with a first hole 12 vertically communicated with the second hole 13, the shear web 8 passes through the second hole 13, the flange 7 is flush with the lower end of the first hole 12, and the edge of the reinforced concrete beam 5 is flush with the edge of the first hole 12 away from the second hole 13. The second hole 13 is arranged as a longitudinal slit, the shear web 8 passes through the second hole 13 and is welded together with the node area steel pipe 2 to form an integral whole; while the first hole 12 is a rectangular structure, which is respectively arranged on the upper and lower sides of the second hole 13, the flange 7 is in contact with and welded to the edge of the side of the first hole 12 close to the second hole 13 to form an integral whole; at the same time, it is convenient for the steel bars of the concrete member to pass through, so that the steel bars inside the reinforced concrete beam 5 on both sides of the node area steel pipe 2 pass through as a whole, and the overall strength of the reinforced concrete beam 5 is improved.

[0059] Further optimization scheme, the four corners of the node area steel pipe 2 are longitudinally provided with a plurality of inclined ribs 10, the two sides of the inclined rib 10 are respectively fixedly connected with the adjacent sides of the node area steel pipe 2, and a grouting through hole 11 is arranged through the inclined rib 10. The setting height of the inclined rib 10 is from the upper and lower ends of the steel pipe to the opening on the two sides of the steel pipe, the inclined rib 10 is welded with the node area steel pipe 2, and the inclined rib 10 and the adjacent two sides of the square steel pipe at right angles form a hollow triangular prism; the arrangement of the inclined rib 10 at the corners around the node area steel pipe 2 can effectively delay the local buckling of the square steel pipe; the inclined rib 10 not only restrains the steel pipe and the concrete, but also jointly bears the axial load; compared with other stiffening rib square steel pipe restrained concrete columns, the inclined rib 10 square steel pipe restrained concrete column has higher strength, ductility and energy dissipation capacity under the same stiffness ratio; the opening of the inclined rib 10 is beneficial to the pouring and ramming of the concrete, so that the integrity of the concrete is stronger; the grouting through hole 11 arranged on the inclined rib 10 is convenient for grouting.

[0060] In an embodiment of the present application, the inclined rib 10 is a vertically arranged plate structure, and a circular grouting through hole 11 is arranged on the plate structure, and the size of the opening can be 1 / 3-1 / 2 of the width of the inclined rib 10.

[0061] Further optimization scheme, the node area steel pipe 2 is welded and fixed with an outer steel plate 3 matched with the shear web 8 on the side wall, and the two outer steel plates 3 are arranged in parallel with the shear web 8. The middle part of the node area steel pipe 2 is a "weak area", and the two outer steel plates 3 arranged on the outside of the node area steel pipe 2 are connected with the node area steel pipe 2, which improves the strength of the "weak area" steel pipe structure, increases the rigidity of the middle part of the node area steel pipe 2, effectively alleviates the local buckling of the steel pipe, avoids the area where the node area steel pipe 2 has relatively large stress concentration, and makes the structure better play the performance.

[0062] In an embodiment of the present application, the outer steel plate 3 is rectangular, arranged at both sides of the steel pipe between the two openings in the node area, the height is consistent with the arranged through web, and the width is consistent with the side length of the steel pipe, and is connected with the node area steel pipe 2 by welding.

[0063] The arranged shear web 8, flange 7, outer steel plate 3 and cable-stayed rib 10 of the present application have simple structure, compared with the existing ring beam type node, additional ring plate type node and built-in steel type node, there is no problem of difficult construction of the node area penetrating rib, the installation method reduces the difficulty and complexity of the field construction, has high material utilization rate, less steel consumption, good economy, beautiful appearance and improves the construction efficiency. The new square steel pipe confined concrete column-reinforced concrete beam node has good mechanical properties, better solves the problem of complex construction of the traditional steel pipe confined concrete column and reinforced concrete beam connecting node, improves the seismic performance of the composite column, and reduces the cost of the composite column.

[0064] Through the finite element simulation analysis of the new node and the specification node, Figure 9 The through shear web 8 in the steel pipe 2 of the new node area almost yields, the shear web 8 effectively transmits the beam end bending moment and shear force outside the node area, plays a certain role in resisting the shear force in the core area of the column body, and improves the shear performance of the node area structure. Figure 10 The steel pipe 2 of the specification node has a large stress concentration area when the specification node is damaged, and Figure 11 The steel pipe of the specification node node area has obvious buckling phenomenon. Compared with the specification node, Figure 12 The new node only has different node area structure, and the others are consistent. Figure 13 The new node effectively limits the buckling of the steel pipe 2 of the node area by increasing the cable-stayed rib 10 to constrain the steel pipe. The cable-stayed rib 10 partially yields and bears part of the axial force, resulting in a large stress. The new node improves the strength of the “weak area” by arranging the outer steel plate 3 outside the steel pipe 2 of the node area, avoids the area with large stress concentration in the node area, and fully plays the mechanical properties of the steel pipe 2 of the node area.

[0065] Figure 14 In order to standardize the finite element results of the concrete damage of the specification node, the concrete damage in the specification node mainly occurs in the node core area and the two sides of the beam near the core area, Figure 15 The plastic hinge of the specification node appears near the two sides of the beam near the core area. Figure 16 And Figure 17 The concrete damage and plastic hinge of the new node mainly occur on the beam, which embodies the characteristics of “strong column and weak beam”. The position of the concrete plastic hinge is close to the position of the two ends of the through shear web 8 and the flange 7, Figure 9The end portions of the overhanging part of the reinforced concrete beam 5 penetrating the through shear web 8 and the flange 7 yield. The column body and the joint area formed by the reinforced concrete beam 5 penetrating the through shear web 8 and the flange 7 have large rigidity, and the plastic zone of the concrete is displaced outward. The reinforced concrete beam 5 not penetrating the through shear web 8 and the flange 7 has small rigidity, and the rigidity difference with the end area is large, so that the reinforced concrete beam 5 not penetrating the through shear web 8 and the flange 7 will bear a large shear force during the load bearing process, and the end portions of the overhanging part yield.

[0066] The utility model discloses further disclose a kind of square steel pipe confined concrete column-RC beam connecting joint construction method, comprising the following steps:

[0067] According to design requirement, upper column steel pipe 1, node area steel pipe 2 and lower column steel pipe 4 are processed, and upper column steel pipe 1, lower column steel pipe 4 and node area steel pipe 2 are all made by rectangular steel plate hemming welding or by seamless rectangular steel pipe cutting.

[0068] Two groups of first holes 12 of equal size are set on the two side walls of node area steel pipe 2, to facilitate the passage of a plurality of beam longitudinal reinforcement 91, and vertical second holes 13 are set between the first holes 12 for the passage of through shear web 8, and the two sides of the through shear web 8 are welded with the inner surface of the steel plate at the second hole 13, and four flanges 7 are welded at the two ends of the through shear web 8 and welded with the outer surface of the node area steel pipe 2.

[0069] Eight inclined pull ribs 10 are arranged at the four inner corners of the upper end and the lower end of the node area steel pipe 2, the setting height of the inclined pull rib 10 is from the upper end and the lower end of the node area steel pipe 2 to the two side openings, the inclined pull rib 10 is welded with the node area steel pipe 2, and the adjacent two sides of the inclined pull rib 10 and the square steel pipe form a hollow triangular prism, the distance between the welding position of the inclined pull rib 10 and the inner surface of the node area steel pipe 2 and the corner of the node area steel pipe 2 can be 1 / 4-1 / 3 of the length of the side of the node area steel pipe 2, the size of the grouting through hole 11 on the cross section of the inclined pull rib 10 can be 1 / 3-1 / 2 of the width of the inclined pull rib 10, and the adjacent distance of the grouting through hole 11 is greater than 1 / 2 of the width of the inclined pull rib 10.

[0070] Finally, two outer steel plates 3 are arranged at the two sides of the steel pipe between the two openings of the node area, and the height is consistent with the arranged through shear web 8, so that the node area steel pipe 2, the inclined pull rib 10, the outer steel plate 3, the through shear web 8 and the flange 7 form a node steel pipe complex.

[0071] A plurality of column longitudinal reinforcement is passed into the node steel pipe complex, and the column longitudinal reinforcement and the column stirrup are bound to form a column steel cage; the lower column steel pipe 4, the node steel pipe complex and the upper column steel pipe 1 are sequentially positioned and fixed by hoisting from bottom to top, and the lower column steel pipe 4, the node steel pipe complex and the upper column steel pipe 1 are not tightly connected, and a steel pipe construction joint of 10mm-20mm is left in the middle.

[0072] Several beam longitudinal reinforcement 91 are passed through the hole of the node area steel pipe 2, and beam longitudinal reinforcement 91 is bound with beam stirrup 92 to form a beam steel cage.

[0073] The beam concrete is poured in the beam steel cage, and the column concrete is poured in the inside of the upper column steel pipe 1, the node steel pipe complex and the lower column steel pipe 4.

[0074] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0075] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A square steel tube confined concrete column-RC beam connection joint, characterized by: The application relates to a connecting joint for connecting a steel pipe confined concrete column and a reinforced concrete beam (5). The connecting joint comprises a node area steel pipe (2) arranged on the steel pipe confined concrete column, and the reinforced concrete beam (5) passes through and is fixed to the node area steel pipe (2). The steel pipe confined concrete column comprises a corresponding upper column and lower column, the upper column is arranged above the node area steel pipe (2), and the lower column is arranged below the node area steel pipe (2). The reinforced concrete beam (5) is provided with a connecting assembly, the connecting assembly passes through and is fixed to the node area steel pipe (2). The node area steel pipe (2) is filled with concrete.

2. The square steel tube confined concrete column-RC beam connection joint according to claim 1, characterized in that: The upper column comprises an upper column steel pipe (1), the bottom end of the upper column steel pipe (1) is arranged in correspondence with the upper end of the node area steel pipe (2) and is provided with a gap, and the concrete in the node area steel pipe (2) is combined with the concrete in the upper column steel pipe (1).

3. The square steel tube confined concrete column-RC beam connection joint according to claim 2, characterized in that: The lower column comprises a lower column steel pipe (4), the top end of the lower column steel pipe (4) is arranged in correspondence with the lower end of the node area steel pipe (2) and is provided with a gap, and the concrete in the node area steel pipe (2) is combined with the concrete in the lower column steel pipe (4).

4. The square steel tube confined concrete column-RC beam connection joint according to claim 3, characterized in that: An upper construction joint (61) is arranged between the upper column steel pipe (1) and the node area steel pipe (2), and a lower construction joint (62) is arranged between the lower column steel pipe (4) and the node area steel pipe (2).

5. The square steel tube confined concrete column-RC beam connection joint according to claim 1, characterized in that: The connecting assembly comprises a shear web (8) vertically penetrating the node area steel pipe (2), the shear web (8) is welded and fixed to the node area steel pipe (2), and the two ends of the shear web (8) protrude from the node area steel pipe (2) and are embedded in the reinforced concrete beam (5).

6. The square steel tube confined concrete column-RC beam connection joint according to claim 5, characterized in that: The upper and lower sides of the part of the shear web (8) protruding from the node area steel pipe (2) are respectively vertically fixed with flanges (7), one end of the flange (7) abuts and is fixed to the side wall of the node area steel pipe (2), and the other end of the flange (7) is flush with the end of the shear web (8) and is embedded in the reinforced concrete beam (5).

7. The square steel tube confined concrete column-RC beam connection joint according to claim 6, characterized in that: Second holes (13) are respectively arranged in the side walls of the node area steel pipe (2) opposite to the reinforced concrete beam (5), first holes (12) vertically communicating with the second holes (13) are respectively arranged on the upper and lower sides of the second holes (13), the shear web (8) passes through the second holes (13), the flange (7) is flush with the lower end of the first hole (12), and the edge of the reinforced concrete beam (5) is flush with the edge of the first hole (12) away from the edge of the second hole (13).

8. The square steel tube confined concrete column-RC beam connection joint according to claim 7, characterized in that: A plurality of inclined pull ribs (10) are longitudinally arranged at the four corners of the node area steel pipe (2), the two sides of the inclined pull rib (10) are respectively fixed to the adjacent edges of the node area steel pipe (2), and grouting through holes (11) are arranged on the inclined pull rib (10).

9. The square steel tube confined concrete column-RC beam connection joint according to claim 5, characterized in that: The node area steel pipe (2) is welded and fixed with outer steel plates (3) matched with the shear webs (8), and the two outer steel plates (3) are arranged in parallel with the shear webs (8).

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