Connecting joint of concrete filled steel tubular column and unequal-height reinforced concrete beam and construction technology

Abstract

The connecting joint comprises a concrete-filled steel tube column body, a first mounting frame is fixedly mounted in the middle of the concrete-filled steel tube column body, and a second mounting frame located at the bottom end of the first mounting frame is fixedly mounted on the concrete-filled steel tube column body; a first reinforced concrete beam is arranged on one side of the concrete-filled steel tube column body, a second reinforced concrete beam is arranged on the other side of the concrete-filled steel tube column body, and the two ends of one side of the first reinforced concrete beam are connected with the two ends of one side of the first mounting frame correspondingly. According to the connection joint of the concrete filled steel tubular column and the unequal-height reinforced concrete beam, the built-in anti-bending steel corbel transition section is adopted for arranging the anti-shearing toggle pins on the built-in steel cow leg section to ensure cooperative work of the beam end combination section, and the combination section resists the bending moment transmitted by the beam end; and meanwhile, the anti-shearing steel corbels are combined to resist shearing force.

Description

Technical Field

[0001] The invention relates to the technical field of steel tube concrete column construction, in particular to a connection node between a steel tube concrete column and reinforced concrete beams of unequal heights and a construction process. Background Art

[0002] Compared with reinforced concrete structures, steel-concrete composite structures can reduce the cross-sectional size of components, reduce the deadweight of the structure, reduce seismic response, increase effective space, reduce foundation cost, increase the ductility and durability of components and structures, etc. Therefore, the use of steel-concrete composite structural components can significantly improve the bearing capacity, seismic resistance and durability of the structure within a reasonable cost range.

[0003] Since the steel tube concrete column adopts a combination form with steel tubes as the main structural units, its overall structural system has strong stability. At the same time, the combination forms of steel tube concrete columns are diverse, and different combinations can be made according to specific needs, so as to meet the structural system requirements of different types of buildings. The steel tube concrete column adopts the method of filling steel tubes with concrete, and the concrete and steel tubes are densely connected, which effectively improves the bearing capacity of the steel tube concrete column. Compared with traditional concrete columns, the bearing capacity of steel tube concrete columns is stronger, can withstand greater pressure and vibration, and has better seismic performance. The method of filling steel tubes with concrete in steel tube concrete columns can effectively make up for the shortcomings of steel itself and improve the durability of steel tube concrete columns. In addition, the mutual bonding of concrete and steel pipe can prevent internal corrosion of steel pipe, greatly extending the service life of steel tube concrete column. During the construction process of steel tube concrete column, prefabrication can be adopted to produce it, reducing the waste of building materials at the construction site. In addition, the prefabrication process can ensure the accurate size and excellent quality of steel tube concrete column, providing a more powerful guarantee for structural construction. The prefabrication process of steel tube concrete column can effectively improve the efficiency of engineering construction. After designing the structural drawings of steel tube concrete column, it can be produced in a prefabricated way, which greatly reduces the construction time and cost. At the same time, during on-site construction, the installation of steel tube concrete column is also very convenient, and the construction task can be completed quickly.

[0004] Reinforced concrete beams are beams made of reinforced concrete materials. Reinforced concrete beams can be made into independent beams, or they can be made into an integral beam-slab floor with reinforced concrete slabs, or they can be made into an integral single-layer or multi-layer frame with reinforced concrete columns.

[0005] However, the traditional steel-concrete composite structure has the following disadvantages:

[0006] (1) When installing traditional steel-concrete composite structures, the current specifications and drawings only provide the node structure of the connection between steel tube concrete and equal-height beams, but do not provide the construction method of the connection node between steel tube concrete and unequal-height beams, making it impossible to carry out standard construction operations;

[0007] (2) The cross-sectional dimensions and beam height of the conventional ring beam structure are both large, and the nodes occupy a large indoor building area, which is easy to collide with indoor pipelines and occupy the pipeline crossing path;

[0008] (3) Conventional beam penetration method requires high positioning accuracy of steel bar penetration, which is difficult to construct and takes a long time to complete;

[0009] (4) The beam ends of the beams need to be treated with haunches, which makes the construction complicated. At the same time, the forces transmitting the bending moment at the nodes are relatively unclear. The beams at the haunches are prone to collide with indoor pipelines, occupying the pipeline crossing path. Summary of the invention

[0010] The purpose of the present invention is to provide a connection node and construction process for steel tube concrete columns and reinforced concrete beams of unequal heights, so as to solve the problem that when installing the traditional steel-concrete composite structure proposed in the above background technology, the current specifications and atlases only give the node structure of the connection between steel tube concrete and equal-height beams, but do not give the construction method of the connection node between steel tube concrete and unequal-height beams, so that standard construction operations cannot be carried out; the plane size of the ring beam cross-section and the beam height of the conventional ring beam structure are both large, the node occupies a large indoor building area, and is easy to collide with indoor pipelines, occupying the pipeline crossing path; the conventional beam penetration method has high positioning accuracy of the steel bar perforation position, great construction difficulty, and a long construction period; the beam wrap method requires axil treatment at the beam end, which is complicated to construct, and at the same time, the force of transmitting the bending moment at the node is relatively unclear, and the beam at the axil is easy to collide with the indoor pipeline, occupying the pipeline crossing path.

[0011] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a connection node between a steel tube concrete column and reinforced concrete beams of unequal heights, comprising a steel tube concrete column body, a first mounting frame fixedly installed in the middle of the steel tube concrete column body, a second mounting frame located at the bottom end of the first mounting frame fixedly installed on the steel tube concrete column body, a first reinforced concrete beam is arranged on one side of the steel tube concrete column body, a second reinforced concrete beam is arranged on the other side of the steel tube concrete column body, two ends of one side of the first reinforced concrete beam are respectively connected to two ends of one side of the first mounting frame, two ends of one side of the second reinforced concrete beam are respectively connected to two ends of one side of the second mounting frame, first steel brackets are arranged on both sides of the connection between the first reinforced concrete beam and the first mounting frame, second steel brackets are arranged on both sides of the connection between the second reinforced concrete beam and the second mounting frame, and a plurality of shear bolts are threadedly connected to the surfaces of the two first steel brackets and the surfaces of the two second steel brackets.

[0012] As a preferred technical solution of the present invention, the two first-type steel corbels are fixedly connected to the first reinforced concrete beam by shear studs.

[0013] As a preferred technical solution of the present invention, the two second-type steel corbels are fixedly connected to the second reinforced concrete beam by shear studs.

[0014] As a preferred technical solution of the present invention, a first stiffening rib is fixedly installed between the first mounting frame and the first reinforced concrete beam.

[0015] As a preferred technical solution of the present invention, the second mounting frame and the second reinforced concrete beam support are fixedly mounted with a second stiffening rib.

[0016] As a preferred technical solution of the present invention, the steel tube concrete column body includes a soil column tube and main beam ring reinforcement, the outer side of the soil column tube is fixedly connected to the inner side of the main beam ring reinforcement, a plurality of frame beam longitudinal reinforcements are fixedly installed on the outer side of the main beam ring reinforcement, a plurality of concrete pouring holes are opened on the surface of the main beam ring reinforcement, and a plurality of ring beam stirrups are fixedly installed inside the main beam ring reinforcement.

[0017] As a preferred technical solution of the present invention, steel sleeves are installed between several longitudinal reinforcements of the frame beams, the bottom end of the first mounting frame is fixedly connected to the top end of the second mounting frame by screws, one end of the first reinforced concrete beam is fixedly installed with a first reinforcement ring located on the steel tube concrete column body, and one end of the second reinforced concrete beam is fixedly installed with a second reinforcement ring located on the steel tube concrete column body.

[0018] As an optimal technical scheme of the present invention, the first mounting frame and the second mounting frame both include a fixing ring and a connecting platform, the middle part of the top of the fixing ring is rotatably connected with a screw rod, the top of the screw rod is threadedly connected with a lifting shell, the top of the lifting shell is fixedly connected to the middle part of the bottom end of the connecting platform, both sides of the top of the fixing ring are fixedly installed with a length rod, the middle parts of the two length rods are slidably connected with a height block, one side of the two height blocks is rotatably connected with a push rod, both sides of the connecting platform are slidably connected to the support platform, the top ends of the two push rods are respectively rotatably connected to the middle parts of the bottom ends of the two support platforms, and two telescopic rod bodies located on both sides of the lifting shell are fixedly installed between the fixing ring and the connecting platform, the vertical height between the fixing ring on the first mounting frame and the connecting platform is equal to the beam width of the first reinforced concrete beam, the vertical height between the fixing ring on the second mounting frame and the connecting platform is equal to the beam width of the second reinforced concrete beam, one side of the fixing ring on the first mounting frame is connected to the first reinforced concrete beam, and one side of the fixing ring on the second mounting frame is connected to the second reinforced concrete beam.

[0019] The construction process of the connection node between the steel tube concrete column and the reinforced concrete beams of different heights of the present invention comprises the following steps:

[0020] Step 1: Install the first mounting frame: fix the first mounting frame on the outside of the steel tube concrete column body;

[0021] Step 2: Install the second mounting frame: fix the second mounting frame on the outside of the steel tube concrete column body;

[0022] Step 3: Assemble the mounting frame: Assemble the first mounting frame and the second mounting frame together by screws;

[0023] Step 4: Connecting the first reinforced concrete beam: installing the first reinforced concrete beam on one side of the first mounting frame, and a first transition section exists at the connection between the two;

[0024] Step 5: Reinforcement of the first transition section: The shear studs and the first steel corbel cooperate with each other to reinforce the first transition section;

[0025] Step 6, connecting the second reinforced concrete beam: installing the second reinforced concrete beam on one side of the second mounting frame, and a second transition section exists at the connection between the two;

[0026] Step 7: Reinforcement of the second transition section: The shear studs and the second steel corbel cooperate with each other to reinforce the second transition section.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. When optimizing the structural design, the advantages and disadvantages of the steel-concrete composite structure components and node forms should be reasonably considered in combination with the structural seismic performance and functional analysis. Finally, the selection of components and nodes should be determined innovatively. The influence of steel distribution form, steel size, and connection form on the bending and shear bearing capacity, deformation, and energy dissipation capacity of components and nodes should be reasonably considered;

[0029] 2. Based on the current specifications and atlas, this innovative invention of the connection node between steel tube concrete columns and reinforced concrete beams of unequal heights uses a built-in bending steel corbel transition section to set shear studs in the built-in steel corbel section to ensure that the combined sections at the beam ends work together, and the combined sections resist the bending moment transmitted from the beam ends; at the same time, the shear steel corbel is combined to resist the shear force. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a detailed structural diagram of the connection node between the steel tube concrete column and the unequal high-rise reinforced concrete beams of the present invention;

[0031] Figure 2 It is a plan view of the connection node between the steel tube concrete column and the unequal high-rise reinforced concrete beams of the present invention;

[0032] Figure 3 is a flow chart of the present invention;

[0033] Figure 4It is a side view of the first mounting frame of the present invention.

[0034] In the figure: 1. Steel tube concrete column body; 101. Earth column tube; 102. Main beam ring reinforcement; 103. Frame beam longitudinal reinforcement; 104. Ring beam stirrups; 105. Concrete pouring hole; 2. First reinforcement ring; 3. Second reinforcement ring; 4. First reinforced concrete beam; 5. Second reinforced concrete beam; 6. First steel corbel; 7. Second steel corbel; 8. Shear studs; 9. First stiffening rib; 10. Second stiffening rib; 11. Steel sleeve; 12. First mounting frame; 121. Fixing ring; 122. Length rod; 123. Push rod; 124. Support platform; 125. Connecting platform; 126. Lifting shell; 127. Telescopic rod body; 128. Height block; 129. Screw rod; 13. Second mounting frame. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-4 The present invention provides a connection node between a steel tube concrete column and reinforced concrete beams of unequal heights, comprising a steel tube concrete column body 1, a first mounting frame 12 is fixedly installed in the middle of the steel tube concrete column body 1, a second mounting frame 13 located at the bottom of the first mounting frame 12 is fixedly installed on the steel tube concrete column body 1, a first reinforced concrete beam 4 is arranged on one side of the steel tube concrete column body 1, and a second reinforced concrete beam 5 is arranged on the other side of the steel tube concrete column body 1, two ends of one side of the first reinforced concrete beam 4 are respectively connected to two ends of one side of the first mounting frame 12, and two ends of one side of the second reinforced concrete beam 5 are respectively connected to two ends of one side of the second mounting frame 13, first steel brackets 6 are arranged on both sides of the connection between the first reinforced concrete beam 4 and the first mounting frame 12, and second steel brackets 7 are arranged on both sides of the connection between the second reinforced concrete beam 5 and the second mounting frame 13, and a plurality of shear bolts 8 are threadedly connected to the surfaces of the two first steel brackets 6 and the surfaces of the two second steel brackets 7.

[0037] The two first steel corbels 6 are fixedly connected to the first reinforced concrete beam 4 via shear studs 8 .

[0038] The two second steel corbels 7 are both fixedly connected to the second reinforced concrete beam 5 via shear studs 8 .

[0039] A first stiffening rib 9 is fixedly installed between the first mounting frame 12 and the first reinforced concrete beam 4 .

[0040] The second mounting frame 13 and the second reinforced concrete beam 5 support a second stiffening rib 10 fixedly mounted thereon.

[0041] The steel tube concrete column body 1 includes a soil column tube 101 and a main beam ring reinforcement 102. The outer side of the soil column tube 101 is fixedly connected to the inner side of the main beam ring reinforcement 102. A plurality of frame beam longitudinal reinforcements 103 are fixedly installed on the outer side of the main beam ring reinforcement 102. A plurality of concrete pouring holes 105 are opened on the surface of the main beam ring reinforcement 102. A plurality of ring beam stirrups 104 are fixedly installed inside the main beam ring reinforcement 102.

[0042] Steel sleeves 11 are installed between several frame beam longitudinal reinforcements 103, the bottom end of the first mounting frame 12 is fixedly connected to the top end of the second mounting frame 13 by screws, one end of the first reinforced concrete beam 4 is fixedly installed with a first reinforcement ring 2 located on the steel tube concrete column body 1, and one end of the second reinforced concrete beam 5 is fixedly installed with a second reinforcement ring 3 located on the steel tube concrete column body 1.

[0043] The first mounting frame 12 and the second mounting frame 13 each include a fixing ring 121 and a connecting platform 125. A screw rod 129 is rotatably connected to the middle of the top of the fixing ring 121. A lifting shell 126 is threadedly connected to the top of the screw rod 129. The top of the lifting shell 126 is fixedly connected to the middle of the bottom of the connecting platform 125. Length rods 122 are fixedly installed on both sides of the top of the fixing ring 121. A height block 128 is slidably connected to the middle of the two length rods 122. One side of the two height blocks 128 is rotatably connected to a push rod 123. Support platforms 124 are slidably connected to the tops of the two push rods 123, respectively. The middle part of the bottom end is rotatably connected, and two telescopic rod bodies 127 are fixedly installed between the fixing ring 121 and the connecting platform 125, which are respectively located on both sides of the lifting shell 126. The vertical height between the fixing ring 121 located on the first mounting frame 12 and the connecting platform 125 is equal to the beam width of the first reinforced concrete beam 4, and the vertical height between the fixing ring 121 located on the second mounting frame 13 and the connecting platform 125 is equal to the beam width of the second reinforced concrete beam 5. One side of the fixing ring 121 located on the first mounting frame 12 is connected to the first reinforced concrete beam 4, and one side of the fixing ring 121 located on the second mounting frame 13 is connected to the second reinforced concrete beam 5.

[0044] The construction process of the connection node between the steel tube concrete column and the reinforced concrete beams of different heights of the present invention comprises the following steps:

[0045] Step 1: Install the first mounting frame 12: fix the first mounting frame 12 on the outer side of the steel tube concrete column body 1;

[0046] Step 2: Install the second mounting frame 13: The second mounting frame 13 is fixedly installed outside the steel tube concrete column body 1;

[0047] Step 3: Assemble the mounting frame: Assemble the first mounting frame 12 and the second mounting frame 13 together by screws;

[0048] Step 4, connecting the first reinforced concrete beam 4: installing the first reinforced concrete beam 4 on one side of the first mounting frame 12, and a first transition section exists at the connection between the two;

[0049] Step 5: Reinforcement of the first transition section: The shear studs 8 and the first steel corbels 6 cooperate with each other to reinforce the first transition section;

[0050] Step 6, connecting the second reinforced concrete beam 5: installing the second reinforced concrete beam 5 on one side of the second mounting frame 13, and a second transition section exists at the connection between the two;

[0051] Step 7: Reinforcement of the second transition section: The shear studs 8 and the second steel corbel 7 cooperate with each other to reinforce the second transition section.

[0052] In the present invention, a first mounting frame 12 is fixedly installed on the outside of the steel tube concrete column body 1; a second mounting frame 13 is fixedly installed on the outside of the steel tube concrete column body 1; the first mounting frame 12 and the second mounting frame 13 are assembled together by screws; a first reinforced concrete beam 4 is installed on one side of the first mounting frame 12, and a first transition section exists at the connection between the two; the shear bolts 8 and the first steel corbel 6 cooperate with each other to reinforce the first transition section; the second reinforced concrete beam 5 is installed on one side of the second mounting frame 13, and a second transition section exists at the connection between the two; the shear bolts 8 and the second steel corbel 7 cooperate with each other to reinforce the second transition section.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A connection node between a steel tube concrete column and reinforced concrete beams of different heights, comprising a steel tube concrete column body (1), characterized in that: A first mounting frame (12) is fixedly mounted in the middle of the steel tube concrete column body (1), and a second mounting frame (13) located at the bottom end of the first mounting frame (12) is fixedly mounted on the steel tube concrete column body (1). A first reinforced concrete beam (4) is provided on one side of the steel tube concrete column body (1), and a second reinforced concrete beam (5) is provided on the other side of the steel tube concrete column body (1). Two ends of one side of the first reinforced concrete beam (4) are respectively connected to two ends of one side of the first mounting frame (12), and two ends of one side of the second reinforced concrete beam (5) are respectively connected to two ends of one side of the second mounting frame (13). First steel brackets (6) are provided on both sides of the connection between the first reinforced concrete beam (4) and the first mounting frame (12), and second steel brackets (7) are provided on both sides of the connection between the second reinforced concrete beam (5) and the second mounting frame (13). A plurality of shear bolts (8) are threadedly connected to the surfaces of the two first steel brackets (6) and the surfaces of the two second steel brackets (7).

2. The connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to claim 1 is characterized in that: The two first-type steel brackets (6) are fixedly connected to the first reinforced concrete beam (4) via shear bolts (8).

3. The connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to claim 1 is characterized by: The two second-type steel brackets (7) are fixedly connected to the second reinforced concrete beam (5) via shear studs (8).

4. The connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to claim 1 is characterized by: A first stiffening rib (9) is fixedly mounted between the first mounting frame (12) and the first reinforced concrete beam (4).

5. The connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to claim 1 is characterized in that: The second mounting frame (13) and the second reinforced concrete beam (5) support are fixedly mounted with a second stiffening rib (10).

6. The connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to claim 1 is characterized by: The steel tube concrete column body (1) comprises a soil column tube (101) and a main beam ring reinforcement (102); the outer side of the soil column tube (101) is fixedly connected to the inner side of the main beam ring reinforcement (102); a plurality of frame beam longitudinal reinforcements (103) are fixedly installed on the outer side of the main beam ring reinforcement (102); a plurality of concrete pouring holes (105) are opened on the surface of the main beam ring reinforcement (102); and a plurality of ring beam stirrups (104) are fixedly installed inside the main beam ring reinforcement (102).

7. The connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to claim 6 is characterized by: A steel sleeve (11) is installed between a plurality of the frame beam longitudinal bars (103); the bottom end of the first mounting frame (12) is fixedly connected to the top end of the second mounting frame (13) by means of screws; a first reinforcement ring (2) located on the steel tube concrete column body (1) is fixedly installed on one end of the first reinforced concrete beam (4); and a second reinforcement ring (3) located on the steel tube concrete column body (1) is fixedly installed on one end of the second reinforced concrete beam (5).

8. The connection node between the steel tube concrete column and reinforced concrete beams of different heights according to claim 1, characterized in that: The first mounting frame (12) and the second mounting frame (13) both comprise a fixing ring (121) and a connecting platform (125); a screw rod (129) is rotatably connected to the middle of the top of the fixing ring (121); a lifting shell (126) is threadedly connected to the top of the screw rod (129); the top of the lifting shell (126) is fixedly connected to the middle of the bottom of the connecting platform (125); length rods (122) are fixedly installed on both sides of the top of the fixing ring (121); the middle of the two length rods (122) are slidably connected to height blocks (128); one side of the two height blocks (128) is rotatably connected to push rods (123); both sides of the connecting platform (125) are slidably connected to the supporting platform (124); the tops of the two push rods (123) are respectively connected to the supporting platform (124); The middle parts of the bottom ends of the two support platforms (124) are rotatably connected, and two telescopic rod bodies (127) are fixedly installed between the fixing ring (121) and the connecting platform (125) and are respectively located on both sides of the lifting shell (126). The vertical height between the fixing ring (121) and the connecting platform (125) on the first mounting frame (12) is equal to the beam width of the first reinforced concrete beam (4), and the vertical height between the fixing ring (121) and the connecting platform (125) on the second mounting frame (13) is equal to the beam width of the second reinforced concrete beam (5). One side of the fixing ring (121) on the first mounting frame (12) is connected to the first reinforced concrete beam (4), and one side of the fixing ring (121) on the second mounting frame (13) is connected to the second reinforced concrete beam (5).

9. The construction process of the connection node between the steel tube concrete column and the reinforced concrete beams of different heights according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Install the first mounting frame (12): fix the first mounting frame (12) on the outside of the steel tube concrete column body (1); Step 2: Install the second mounting frame (13): fix the second mounting frame (13) on the outside of the steel tube concrete column body (1); Step 3, assembling the mounting frame: assembling the first mounting frame (12) and the second mounting frame (13) together by screws; Step 4, connecting the first reinforced concrete beam (4): installing the first reinforced concrete beam (4) on one side of the first mounting frame (12), and a first transition section is formed at the connection between the two; Step 5: Reinforcement of the first transition section: the shear studs (8) and the first steel corbel (6) cooperate with each other to reinforce the first transition section; Step 6, connecting the second reinforced concrete beam (5): installing the second reinforced concrete beam (5) on one side of the second mounting frame (13), and a second transition section is provided at the connection between the two; Step 7: Reinforcement of the second transition section: The shear studs (8) and the second steel corbel (7) cooperate with each other to reinforce the second transition section.

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