A connecting structure of a concrete-filled steel tubular column and a concrete beam

Abstract

The application discloses a kind of steel pipe concrete column and concrete beam connecting structure, relate to steel reinforced concrete technical field, including steel pipe column, distribute in the beam frame of the side of steel pipe column, fixed mechanism is arranged between the steel pipe column and the beam frame, the fixed mechanism includes a group of hoop plate that is sleeved and welded fixed to the outside of the steel pipe column, one corbel plate is welded and fixed between two hoop plate;The inside of the steel pipe column is provided with reinforcing mechanism, the reinforcing mechanism includes lining plate welded and fixed in the inside of the steel pipe column, a pair of reinforcing plate is welded and fixed in the upper and lower ends of the lining plate, the side of each reinforcing plate is welded and fixed with a group of inner sleeve, the outside of the steel pipe column is attached and distributed with several mutually closed outer arc plate, the outer arc plate is distributed between two hoop plate.The steel pipe concrete column and concrete beam connecting structure disclosed in the application have the effects of high stability and high structural strength.

Description

Technical Field

[0001] This invention relates to the field of steel-concrete composite technology, and more particularly to a connection structure between a steel-concrete composite column and a concrete beam. Background Technology

[0002] A concrete-filled steel tube column-concrete beam connection structure refers to a joint force transfer system formed by connecting a steel tube column filled with concrete to a reinforced concrete beam or a steel-concrete composite beam. Its core feature is the use of concrete-filled steel tube (CFST), which combines the advantages of both steel and concrete materials. It solves the problem of how to safely and effectively transfer the stress of the reinforcing steel bars (or the internal force of the steel beam) in the beam to the central concrete-filled steel tube column. This is a composite structural joint form widely used in modern buildings, especially in large-span, heavy-load, and high-rise structures.

[0003] The existing steel-concrete composite columns and concrete beams have relatively thin structures at the connection nodes. Under repeated loading (such as earthquakes), the flange tension of the steel beam will be transferred to the steel-concrete composite column. At this time, a huge stress concentration will be generated in this force transmission area. If the construction is not handled properly, it is easy to cause severe stress concentration at the weld between the diaphragm and the pipe wall, resulting in low-cycle fatigue failure. The structural strength needs to be improved. Summary of the Invention

[0004] This invention discloses a connection structure between a steel-concrete composite column and a concrete beam, aiming to solve the technical problem that the structural strength of existing steel-concrete composite columns and concrete beams at the connection nodes needs to be improved.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steel-concrete composite column and concrete beam connection structure includes a steel-concrete composite column and beams distributed on the sides of the steel-concrete composite column. A fixing mechanism for connection is provided between the steel-concrete composite column and the beams. The fixing mechanism includes a set of hoop plates sleeved and welded to the outside of the steel-concrete composite column. A corbel plate is welded between two of the hoop plates. Several sets of bolt holes are opened on the outside of the corbel plate. The beams are horizontally spliced ​​to the side of the corbel plate.

[0007] The steel pipe column is equipped with a reinforcement mechanism to improve the structural strength of the fixing mechanism. The reinforcement mechanism includes an inner lining plate welded and fixed inside the steel pipe column. A pair of reinforcing plates are welded and fixed at the upper and lower ends of the inner lining plate. The reinforcing plates are in the shape of a cross. A set of inner fittings are welded and fixed to the side of each reinforcing plate. Several mutually closed outer arc plates are attached to the outside of the steel pipe column. The outer arc plates are distributed between two hoop plates.

[0008] The fixing mechanism, in conjunction with the reinforcement mechanism, enables a rapid connection between the steel pipe column and the beam frame, while simultaneously improving the shear resistance of the fixing mechanism.

[0009] By incorporating a fixing mechanism into the traditional steel-concrete composite column and earth-beam connection structure, a rapid connection between the steel column and the beam frame is achieved. Simultaneously, a reinforcement mechanism installed inside the steel column enhances the structural strength of the column at the connection point. Furthermore, the reinforcement mechanism utilizes force transmission to distribute stress across the entire steel column when subjected to repeated loads at the connection point, thereby reducing concentrated stress at the connection point. This significantly improves the overall structure's stress resistance while enhancing the structural strength of the steel column itself.

[0010] In a preferred embodiment, a pair of side plates are attached to both sides of the beam frame and the corbel plate, and high-strength bolts are installed on the internal threads of the side plates and several sets of bolt holes to fix the corbel plate and the beam frame.

[0011] By setting two hoop plate structures connected by corbel plates on the foundation of the steel pipe column, the corbel plates are quickly fixed by welding the hoop plates and the steel pipe column. At the same time, after the workers horizontally attach the beam frame to the side of the corbel plate, they complete the rapid installation of the steel pipe column and beam frame by using the bolt holes, high-strength bolts and the cooperation of the side plates, thereby improving the operation efficiency during installation.

[0012] In a preferred embodiment, short bolts and long bolts are threadedly connected between several outer arc plates and the inner sleeve. The long bolts are distributed on the side of the corbel plate. Several sets of circular grooves are opened on the outer side of the steel pipe column, and the short bolts and long bolts pass through the inside of the circular grooves.

[0013] By installing an inner lining plate structure welded inside the steel pipe column on its foundation, and pre-welding reinforcing plates in a cross-shaped pattern at the upper and lower ends of the inner lining plate, while an inner fitting structure is welded and fixed to the outside of the reinforcing plates, the internal structural strength of the steel pipe column is improved by using the reinforcing plates. The inner fitting, along with short and long bolts, is used to further enhance the structural strength of the steel pipe column by adding an outer arc plate structure to the outside of the steel pipe column. Simultaneously, by utilizing the distribution relationship between the long bolts and the beam frame, when the connection node between the steel pipe column and the beam frame is subjected to repeated loads, the stress generated by the load is dispersed to the entire steel pipe column, thereby reducing the concentrated stress at a single connection node. This significantly improves the stress resistance of the overall structure while increasing the structural strength of the steel pipe column itself.

[0014] In a preferred embodiment, the short bolt includes a bolt shank with threaded grooves at both ends, one of the grooves being threaded into the interior of the inner fitting, the other end of the threaded groove being welded to a hexagonal head, and the outer side of the other threaded groove being threaded with a nut, the nut being pressed and engaged with the outer side of the outer arc plate. The structure of the long bolt is the same as that of the short bolt.

[0015] By using a structure with specially shaped long bolts and short bolts between the inner assembly and the outer arc plate, the bolts are first installed inside the inner assembly by using a bolt rod structure with threaded grooves at both ends and rotating a hexagonal head. Then, the outer arc plate is fixed by using a nut with the threaded groove at the other end of the bolt. Finally, the special connection structure is used to adapt to the installation of this equipment and maintain the integrity of its operation.

[0016] As can be seen from the above, the steel-concrete composite column and concrete beam connection structure provided by the present invention has the following technical effects.

[0017] By installing two clamping plates connected by corbels on the foundation of the steel pipe column, the corbels are quickly fixed using the welding relationship between the clamps and the steel pipe column. Simultaneously, after the beam frame is horizontally fitted to the side of the corbels, the steel pipe column and beam frame are quickly installed using bolt holes, high-strength bolts, and the side plates, thus improving installation efficiency. Furthermore, the steel pipe column has an internal lining plate welded to it, with reinforcing plates pre-welded in a cross shape at the top and bottom. An inner fitting structure is welded and fixed to the outside of the reinforcing plates. By using reinforcing plates to improve the internal structural strength of the steel pipe column, and using internal fittings in conjunction with short and long bolts, an additional outer arc plate structure is installed on the outside of the steel pipe column. The reinforcing plates improve the structural strength of the inner and outer sides of the steel pipe column. At the same time, by utilizing the distribution relationship between the long bolts and the beam frame, when the connection node between the steel pipe column and the beam frame is subjected to repeated loads, the stress generated by the load is dispersed to the entire inner and outer parts of the steel pipe column, thereby reducing the concentrated stress at a single connection node. While improving the structural strength of the steel pipe column itself, the stress resistance of the overall structure is greatly improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure proposed in this invention.

[0019] Figure 2 This is an exploded view of the overall structure proposed in this invention.

[0020] Figure 3 The present invention proposes Figure 2 Enlarged view of the structure at point A in the middle.

[0021] Figure 4 This is a schematic diagram of the reinforcing plate structure proposed in this invention.

[0022] Figure 5 This is a schematic diagram of the fixing mechanism structure proposed in this invention.

[0023] Figure 6 This is a cross-sectional view of the steel pipe column structure proposed in this invention.

[0024] Figure 7 This is a schematic diagram of the structure of the outer arc plate after installation according to the present invention.

[0025] Figure 8 This is a schematic diagram of the short bolt component structure proposed in this invention.

[0026] In the diagram: 1. Steel pipe column; 2. Beam frame; 3. Fixing mechanism; 301. Hoop plate; 302. Bracket plate; 303. Bolt hole; 304. Side plate; 3041. Ear chamber; 305. High-strength bolt; 306. Through port; 4. Reinforcing mechanism; 401. Inner lining plate; 4011. Injection port; 402. Reinforcing plate; 403. Inner sleeve; 404. Outer arc plate; 405. Short bolt piece; 4051. Bolt rod; 4052. Threaded groove; 4053. Hexagonal head; 4054. Nut; 4055. Washer; 406. Long bolt piece; 407. Outer sleeve; 4071. Reserved opening; 408. Circular groove. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] The steel-concrete composite column and concrete beam connection structure disclosed in this invention is mainly used in scenarios where steel pipe components and beam frames are installed and fixed.

[0029] Reference Figures 1 to 8 A steel-concrete composite column and concrete beam connection structure includes a steel-concrete composite column 1 and a beam frame 2 distributed on the side of the steel-concrete composite column 1. A fixing mechanism 3 is provided between the steel-concrete composite column 1 and the beam frame 2 to provide connection. The fixing mechanism 3 includes a set of hoop plates 301 that are sleeved and welded to the outside of the steel-concrete composite column 1. A corbel plate 302 is welded and fixed between the two hoop plates 301. Several sets of bolt holes 303 are opened on the outside of the corbel plate 302. The beam frame 2 is horizontally spliced ​​to the side of the corbel plate 302.

[0030] The steel pipe column 1 is equipped with a reinforcement mechanism 4 to improve the structural strength of the fixing mechanism 3. The reinforcement mechanism 4 includes an inner lining plate 401 welded and fixed inside the steel pipe column 1. A pair of reinforcing plates 402 are welded and fixed at the upper and lower ends of the inner lining plate 401. The reinforcing plates 402 are in the shape of a cross. A set of inner fittings 403 are welded and fixed on the side of each reinforcing plate 402. Several mutually closed outer arc plates 404 are attached to the outside of the steel pipe column 1. The outer arc plates 404 are distributed between two hoop plates 301.

[0031] The fixing mechanism 3, in conjunction with the reinforcement mechanism 4, enables a rapid connection between the steel pipe column 1 and the beam frame 2, while simultaneously improving the shear resistance of the fixing mechanism 3.

[0032] In this embodiment: Before the beam frame 2 is installed, the reinforcement mechanism 4 has been prefabricated and welded inside the beam frame 2 and is horizontally distributed with the fixing mechanism 3. The worker uses a crane to lift the steel pipe column 1 and prefabricate and fix it to the top of the base column. At this time, the worker uses the crane to lift the beam frame 2 horizontally, aligns the end of the beam frame 2 with the fixing mechanism 3 horizontally and fixes it. The reinforcement mechanism 4 will improve the structural strength of the steel pipe column 1. When the connection node between the steel pipe column 1 and the beam frame 2 is subjected to repeated loads (such as earthquakes), the reinforcement mechanism 4 will distribute the stress generated by the load to the whole steel pipe column 1, thereby reducing the concentrated force at a single point of the connection node.

[0033] Reference Figures 1 to 3 , Figures 5 to 7 In a preferred embodiment, a pair of side plates 304 are attached to both sides of the beam frame 2 and the corbel plate 302. High-strength bolts 305 are installed on the internal threads of the side plates 304 and several sets of bolt holes 303 to fix the corbel plate 302 and the beam frame 2.

[0034] Before installing the beam frame 2, two hoop plates 301 were prefabricated and welded to the outside of the steel pipe column 1. At the same time, the corbel plate 302 was welded between the two hoop plates 301. The workers used a crane to lift the steel pipe column 1 and prefabricate and fix it to the top of the base column. Then, the workers used the crane to lift the beam frame 2 horizontally, aligned the end of the beam frame 2 and the corbel plate 302 horizontally, aligned the two sets of side plates 304 with several sets of bolt holes 303, and inserted the high-strength bolts 305 horizontally into the bolt holes 303 and fixed them with an electric wrench. After fixing the high-strength bolts 305, the workers used a welding torch to weld and fix the joint between the corbel plate 302 and the beam frame 2, thus completing the installation of the beam frame 2.

[0035] Reference Figures 1 to 8In a preferred embodiment, short bolts 405 and long bolts 406 are threadedly connected between several outer arc plates 404 and inner sleeves 403. The long bolts 406 are distributed on the side of the bracket plate 302. Several sets of circular grooves 408 are opened on the outer side of the steel pipe column 1. The short bolts 405 and long bolts 406 pass through the inside of the circular grooves 408.

[0036] Before installing the beam frame 2, workers weld the reinforcing plate 402 to the upper and lower ends of the inner lining plate 401. Simultaneously, the inner lining plate 401 is inserted into the end of the steel pipe column 1, and according to pre-measured points, the inner lining plate 401 and the reinforcing plate 402 are welded and fixed to the inner wall of the steel pipe column 1 using a welding torch. At this point, workers use a crane to lift the steel pipe column 1 and prefabricate it to the top of the base column. Then, workers use the crane to horizontally lift the beam frame 2, aligning and fixing the ends of the beam frame 2 and the corbel plate 302 horizontally. Workers then use short bolts 405 and long bolts 406 to pass through the circular groove 408 and connect them with the inner fitting 403 by thread. Then, several outer arc plates 404 are fixed to the outside of the steel pipe column 1 in sequence. When the connection node between the steel pipe column 1 and the beam frame 2 is subjected to repeated loads (such as earthquakes), the reinforcing plate 402, short bolts 405 and long bolts 406 and outer arc plates 404 will evenly distribute the stress generated by the load to the entire steel pipe column 1, thereby reducing the concentrated stress at a single point of the connection node.

[0037] The inner lining plate 401 has several evenly distributed grouting ports 4011 that run through its interior. When workers pour concrete into the steel pipe column 1, the grouting ports 4011 provide space for the concrete to flow. It should be noted that the steel pipe concrete column can be grouted using the jacking method or the high-throw method, and manual vibration can be used to eliminate air bubbles.

[0038] Furthermore, an outer sleeve 407 is welded and fixed to the middle of the bracket plate 302, and a long bolt 406 is sleeved and installed inside the outer sleeve 407. The end of the outer sleeve 407 is reserved with a reserved opening 4071, and the ends of the long bolt 406 are distributed inside the reserved opening 4071. The middle of the side plate 304 is provided with an ear chamber 3041, which is symmetrically engaged with the outer sleeve 407 and the outside of the long bolt 406, thereby improving the stability of the long bolt 406 after installation.

[0039] Reference Figures 1 to 3 and Figure 8In a preferred embodiment, the short bolt 405 includes a bolt shank 4051 with threaded grooves 4052 at both ends. One threaded groove 4052 is threaded into the interior of the inner sleeve 403. A hexagonal head 4053 is welded to the end of the other threaded groove 4052. A nut 4054 is screwed onto the outer side of the other threaded groove 4052. The nut 4054 is pressed and engaged with the outer side of the outer arc plate 404. The structure of the long bolt 406 is the same as that of the short bolt 405.

[0040] When the worker installs the outer arc plate 404, taking the short bolt 405 as an example, the worker passes the bolt shank 4051 through the circular groove 408 and uses a wrench to move the hexagonal head 4053, so that the threaded groove 4052 at the end of the bolt shank 4051 and the inner fitting 403 are threadedly connected. At the same time, the outer arc plate 404 is passed through the other end of the bolt shank 4051 and attached to the outside of the steel pipe column 1. Then, the nut 4054 is screwed onto the outside of the threaded groove 4052 at the other end of the bolt shank 4051 using an electric wrench, thus completing the fixing of the outer arc plate 404.

[0041] Specifically, a washer 4055 is placed between the nut 4054 and the outer arc plate 404 to improve the stability of the outer arc plate 404; and a through opening 306 is reserved between the bracket plate 302 and the steel pipe column 1, so that an outer arc plate 404 can be attached to the outside of the steel pipe column 1 through the through opening 306.

[0042] Working principle: When using, such as Figure 5 As shown, before installing the beam frame 2, two hoop plates 301 were prefabricated and welded to the outside of the steel pipe column 1, while the corbel plate 302 was welded between the two hoop plates 301; in addition, as Figure 4As shown, the worker welds the reinforcing plate 402 to the upper and lower ends of the inner lining plate 401. Simultaneously, the inner lining plate 401 is inserted from the end of the steel pipe column 1, and according to pre-measured points, the inner lining plate 401 and the reinforcing plate 402 are welded and fixed to the inner wall of the steel pipe column 1 using a welding torch, so that the circular groove 408 corresponds to the inner fitting 403. Afterwards, the worker uses a crane to lift the steel pipe column 1 and prefabricate it to the top of the base column. Then, the worker uses the crane to horizontally lift the beam frame 2, horizontally aligning the end of the beam frame 2 and the corbel plate 302, and aligning the two sets of side plates 304 with several sets of bolt holes 303. At the same time, high-strength bolts 305 are horizontally inserted into the bolt holes 303 and... After securing the high-strength bolt 305 with an electric wrench, the worker uses a welding torch to weld and secure the joint between the corbel plate 302 and the beam frame 2, completing the installation of the beam frame 2. Then, the worker uses short bolts 405 and long bolts 406 to pass through the circular groove 408 and thread them onto the inner fitting 403. Several outer arc plates 404 are then sequentially fixed to the outside of the steel pipe column 1. When the connection point between the steel pipe column 1 and the beam frame 2 is subjected to repeated loads, the reinforcing plate 402, short bolts 405 and long bolts 406, and outer arc plates 404 will evenly distribute the stress generated by the load to the entire steel pipe column 1, thereby reducing the concentrated stress at a single point on the connection point.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A structure for connecting a concrete filled steel tube column to a concrete beam, comprising a steel tube column (1) and a beam frame (2) distributed on the side surface of the steel tube column (1), characterized in that, The steel pipe column (1) and the beam frame (2) are provided with a fixing mechanism (3) for providing connection, the fixing mechanism (3) comprises a group of hoop plates (301) sleeved and welded on the outer side of the steel pipe column (1), a corbel plate (302) is welded between two hoop plates (301), a plurality of bolt openings (303) are formed on the outer side of the corbel plate (302), and the beam frame (2) is horizontally spliced on the side of the corbel plate (302); The inside of the steel pipe column (1) is provided with a reinforcing mechanism (4) for improving the structural strength of the fixing mechanism (3), the reinforcing mechanism (4) comprises an inner lining plate (401) welded in the inside of the steel pipe column (1), a pair of reinforcing plates (402) are welded at the upper and lower ends of the inner lining plate (401), the reinforcing plates (402) are in the shape of a cross, a group of inner sleeves (403) are welded on the side of each reinforcing plate (402), and a plurality of outer arc plates (404) are distributed on the outer side of the steel pipe column (1) and are closed to each other; A plurality of short bolt pieces (405) and long bolt pieces (406) are threadedly connected between the outer arc plates (404) and the inner sleeves (403); The fixing mechanism (3) is used in cooperation with the reinforcing mechanism (4) to quickly connect the steel pipe column (1) and the beam frame (2), and the shear resistance of the fixing mechanism (3) is improved; A pair of side plates (304) are distributed on the two sides of the corbel plate (302); A plurality of circular grooves (408) are formed on the outer side of the steel pipe column (1), the short bolt pieces (405) and the long bolt pieces (406) pass through the circular grooves (408) from the inside to the outside, and the long bolt pieces (406) are distributed on the side of the corbel plate (302); The short bolt piece (405) comprises a bolt rod (4051) provided with a threaded groove (4052) at both ends, one threaded groove (4052) is threadedly connected in the inner sleeve (403), the end of the other threaded groove (4052) is welded with a hexagonal head (4053), and the outer side of the other threaded groove (4052) is threadedly screwed with a nut (4054), and the nut (4054) is extruded and clamped on the outer side of the outer arc plate (404); The outer sleeve (407) is welded on the middle part of the corbel plate (302), and the long bolt piece (406) is sleeved and installed in the inner sleeve (407); The end of the outer sleeve (407) is provided with a reserved opening (4071), and the end of the long bolt piece (406) is distributed in the reserved opening (4071); The middle part of the side plate (304) is provided with an ear room (3041), and the ear room (3041) is symmetrically clamped on the outer side of the outer sleeve (407) and the long bolt piece (406).

2. The structure for connecting a concrete filled steel tubular column and a concrete beam according to claim 1, wherein High-strength bolts (305) are installed in the inner threads of the side plates (304) and the bolt holes (303) to fix the bracket plates (302) and the beam frames (2).

3. The structure according to claim 2, wherein The long bolt (406) has the same structure as the short bolt (405).

4. The structure according to claim 3, wherein A gasket (4055) is placed between the nut (4054) and the outer arc plate (404).

5. The connection structure of a concrete-filled steel tubular column and a concrete beam according to claim 1, characterized in that, A plurality of evenly distributed pouring holes (4011) are formed in the inner part of the inner lining plate (401).

6. The connection structure of a concrete-filled steel tubular column and a concrete beam according to claim 1, characterized by A through opening (306) is reserved between the bracket plate (302) and the steel pipe column (1), and one outer arc plate (404) is attached to the outer side of the steel pipe column (1) through the through opening (306).

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