A connection node of steel tube concrete column, composite beam and composite plate and its construction method

Abstract

The present invention belongs to the technical field of prefabricated buildings, specifically a steel tube concrete column, composite beam and composite plate connection node and its construction method, including a steel tube column, a composite beam U-shaped steel, a composite plate precast plate, a first temporary support and a second temporary support, the steel tube column is provided with a steel bar anchoring special-shaped hole and a reinforcing plate limiting hole, the top of the composite beam U-shaped steel is welded with a bolt connector, both sides of the composite beam U-shaped steel are provided with tension bolt mounting holes, a steel bar truss is provided on the composite plate precast plate, and a reinforcing plate for inserting the reinforcing plate limiting hole is welded to the inner bottom end of the composite beam U-shaped steel. Through the coordinated use of the above structures, the bearing capacity and seismic performance of the composite beam U-shaped steel, steel tube column and composite plate precast plate node system can be effectively increased, the connection performance of the steel tube column and concrete can be strengthened, and local concentrated force and the weakening of the bearing capacity by the opening of the steel tube column wall can be avoided, thereby meeting construction requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated buildings, and in particular relates to a connection node of a steel tube concrete column, a composite beam and a composite plate, and a construction method thereof. Background Art

[0002] Prefabricated structures are a major trend in green building promotion today. Widely used in various types of buildings, they significantly improve material efficiency and reduce on-site wet work. Prefabricated frame structures are the most widely used in civil structures such as schools, hospitals, and office buildings, offering advantages such as flexible floor plans and strong structural integrity. Furthermore, concrete-filled steel tube columns have seen a gradual increase in their use in new buildings in recent years due to their high bearing capacity, superior seismic performance, and ease of construction.

[0003] In a concrete-filled steel tube (CFST) column frame structure, CFST columns, composite beam U-shaped steel sections, and composite slabs are commonly used. The connection points between these three elements are key challenges in design and construction. The connection points between CFST columns, composite beams, and composite slabs are typically cast on-site, requiring numerous types of steel reinforcement and requiring a high workload. The positioning accuracy of the reinforcement binding is often poor, and the existing structure is primarily supported by the connection between the composite beam U-shaped steel sections and the steel tube column walls. The connections between the composite slab and steel tube columns, and between the composite beam U-shaped steel sections and the core concrete of the CFST columns, are relatively weak. Furthermore, the synergistic effect between the steel tube and concrete during the elastic working phase of CFST is weak, making the outer slabs of the steel tube columns susceptible to local yielding and failing to meet the design requirement of "strong nodes, weak components."

[0004] To this end, the present invention provides a steel tube concrete column, composite beam and composite plate connection node and a construction method thereof. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a steel tube concrete column, composite beam and composite plate connection node described in the present invention includes a steel tube column, a composite beam U-shaped steel, a composite plate prefabricated plate, a first temporary support and a second temporary support;

[0007] The steel pipe columns are provided with special-shaped holes for steel bar anchorage and limiting holes for the reinforcement plates. The top of the composite beam U-shaped steel is welded with stud connectors. Both sides of the composite beam U-shaped steel are provided with holes for mounting tension bolts. The prefabricated plates of the composite slabs are provided with steel bar trusses.

[0008] A reinforcement plate for inserting the reinforcement plate limit hole is welded to the inner bottom end of the composite beam U-shaped steel. The reinforcement plate is set to L-shaped and has multiple reinforcement plate PBL shear holes. A rib plate is welded to the inner bottom end of the composite beam U-shaped steel and has rib plate PBL shear holes.

[0009] The U-shaped steel of the composite beam is provided with a first longitudinal reinforcement, the precast plate of the composite plate is provided with a second longitudinal reinforcement, and both ends of the first longitudinal reinforcement and the second longitudinal reinforcement are connected to the composite special-shaped steel bar anchor plate by screw threads;

[0010] The ends of the longitudinal reinforcements in the bottom layer of the composite slab precast slab are connected to circular reinforcement anchor plates through threads;

[0011] The combined special-shaped steel bar anchor plate is composed of a first special-shaped steel bar anchor plate, a second special-shaped steel bar anchor plate, a third special-shaped steel bar anchor plate and a fourth special-shaped steel bar anchor plate;

[0012] The top of the U-shaped steel of the composite beam is welded with a semi-ring stirrup for fixing the first longitudinal reinforcement;

[0013] Tension bolts for penetrating the shear holes of the rib plate PBL and the shear holes of the reinforcement plate PBL are slidably installed inside the tension bolt installation holes;

[0014] The first temporary support is used to support the composite slab precast plate, and the second temporary support is used to support the composite beam U-shaped steel.

[0015] The diameter of the shear hole of the rib plate PBL shall not be less than 2.5 times the diameter of the tension bolt and not less than 35mm. The diameter of the tension bolt installation hole shall not be greater than the bolt diameter by more than 0.5mm. The position of the shear hole of the rib plate PBL corresponds to that of the tension bolt installation hole.

[0016] The length of one end of the reinforcement plate extending into the steel pipe column is less than 0.5 times the length of the short side of the steel pipe column, the length of the reinforcement plate extending into the composite beam U-shaped steel is greater than 0.3 times the height of the composite beam U-shaped steel, and the reinforcement plate (height is not less than the height of the rib plate and not greater than 0.5 times the height of the composite beam U-shaped steel).

[0017] The protruding length of the two welded ends of the semi-ring stirrups shall not exceed 0.6 times the width of the U-shaped steel top plate of the composite beam and shall not be less than 30mm.

[0018] The first temporary support includes a plurality of support rods, on which a first cross bar and a second cross bar are rotatably mounted. The plurality of support rods cooperate with the first cross bar and the second cross bar to form the first temporary support.

[0019] A rotating rod is rotatably installed inside each of the multiple support rods, a rotating ring for controlling the rotation of the rotating rod is rotatably installed on the support rod, a worm is rotatably installed on the rotating rod, and a worm gear is fixedly installed on one end of the first cross bar and the second cross bar close to the support rod, the worm gear is meshed with the worm gear, and the first cross bar and the second cross bar are in the same horizontal plane.

[0020] The bottom ends of the multiple support rods are all fixedly installed with a base, the inner part of the base is rotatably installed with a wire take-up roller, and connecting lines are provided on the base and the wire take-up roller.

[0021] A ratchet is fixedly installed on the outer wall of the take-up roller, a ratchet rod is elastically installed inside the base, a control rod is fixedly installed on the top of the ratchet rod, and one end of the control rod extends out of the outer wall of the base.

[0022] The top end of the take-up roller is fixedly connected with a coil spring, and the other end of the coil spring is fixedly connected to the inner wall of the base.

[0023] A construction method for connecting a steel tube concrete column, a composite beam and a composite slab comprises the following steps:

[0024] S1: Open multiple special-shaped steel bar anchor holes and reinforcement plate limit holes on the steel pipe column, open tension bolt installation holes on both sides of the composite beam U-shaped steel, weld ribs to the bottom plate of the composite beam U-shaped steel, and open multiple rib PBL shear holes, open tension bolt installation holes on the side wall of the composite beam U-shaped steel, and weld stud connectors to the top plate of the composite beam U-shaped steel;

[0025] S2: Add the first longitudinal reinforcement to the composite beam U-shaped steel and the second longitudinal reinforcement to the composite slab precast plate on site, and connect the ends of the first longitudinal reinforcement and the second longitudinal reinforcement with a composite special-shaped steel bar anchor plate by screw thread;

[0026] S3: Make an L-shaped reinforcement plate, open multiple PBL shear holes in the reinforcement plate, and make multiple semi-ring stirrups;

[0027] S4: Installation of beam and column components: hoist and install the steel pipe column, set up the first temporary support, hoist the composite beam U-shaped steel to the top of the first temporary support, align the reinforcement plate with the reinforcement plate limit holes opened on the steel pipe column, and push it into the steel pipe column, and weld the contact parts of the steel pipe column, reinforcement plate and composite beam U-shaped steel;

[0028] S5: Beam reinforcement binding: Attach the first longitudinal reinforcement to the composite beam U-shaped steel with the composite special-shaped reinforcement anchor plate on site, align the first longitudinal reinforcement with the reinforcement anchor special-shaped hole, and push it into the interior of the steel pipe column, so that the third special-shaped reinforcement anchor plate enters the reinforcement anchor special-shaped hole, rotate the first longitudinal reinforcement on the composite beam U-shaped steel, and tighten the fourth special-shaped reinforcement anchor plate close to the inner side of the steel pipe column wall toward the outer side of the pipe wall, then weld the semi-ring stirrups to the top plate of the composite beam U-shaped steel, and tie it to the first longitudinal reinforcement on the composite beam U-shaped steel, then pass the tension bolts through the tension bolt installation holes, the rib plate PBL shear holes, and the reinforcement plate PBL shear holes to complete the connection between the composite beam U-shaped steel and the steel pipe column;

[0029] S6: Installation of the composite slab precast panel: Set up a second temporary support, hoist the composite slab precast panel onto the second temporary support, align the second longitudinal reinforcement of the composite slab precast panel extending into the steel pipe column with the steel bar anchorage special-shaped hole, push the second longitudinal reinforcement into the inside of the steel pipe column, rotate the second longitudinal reinforcement and tie it to the steel bar truss to complete the connection between the composite slab precast panel 5 and the steel pipe column 1, and finally tie the second longitudinal reinforcement extending into the U-shaped steel of the composite beam to the semi-ring stirrups to complete the connection between the composite slab precast panel and the U-shaped steel of the composite beam;

[0030] S7: Pour concrete to the nodes of steel tube columns, composite beam U-shaped steel and composite slab precast panels to complete the connection of steel tube concrete columns, composite beams and composite slab nodes.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. The present invention discloses a connection node of steel tube concrete column, composite beam and composite plate and its construction method, wherein a reinforcement plate is arranged between the composite beam U-shaped steel and the core concrete of the steel tube column for effective connection, a first longitudinal reinforcement is arranged on the composite beam U-shaped steel, a second longitudinal reinforcement is arranged on the composite plate prefabricated plate, and a composite special-shaped steel bar anchor plate is arranged at the end, which is installed through a steel bar anchor special-shaped hole with a similar shape to the special-shaped steel bar anchor plate opened on the inner wall of the steel tube column, wherein the first special-shaped steel bar anchor plate near the inner side of the steel tube column is connected to the core concrete of the steel tube column, and the second special-shaped steel bar is connected to the core concrete of the steel tube column. The anchor plate locally strengthens the inner wall of the steel pipe column. The third special-shaped steel bar anchor plate is installed in the hole in the pipe wall to reduce the cross-sectional weakening caused by the hole in the pipe wall. The fourth special-shaped steel bar anchor plate is screwed on the outside of the pipe wall. Studs and T-shaped ribs are connected to the top of the U-shaped steel top plate and the bottom plate of the composite beam by welding respectively. These connection methods can significantly increase the bearing capacity and seismic performance of the composite beam U-shaped steel, steel pipe column and composite plate precast plate node system, strengthen the connection performance between the steel pipe column and concrete, and avoid local concentrated force and the weakening of the bearing capacity by the opening in the steel pipe column wall, thus meeting construction requirements.

[0033] 2. The present invention describes a connection node for steel tube concrete columns, composite beams, and composite slabs, and a construction method thereof. After prefabrication, the components are hoisted to the site, and the reinforcing plate, steel tube column, and composite beam U-shaped steel are welded together. The amount of welding work is small. The first longitudinal reinforcement provided on the composite beam U-shaped steel and the second longitudinal reinforcement on the composite slab prefabricated plate are quickly and accurately positioned and tied through semi-annular stirrups and steel tube steel bar anchoring special-shaped holes. The tension bolts fixed on both sides of the composite beam U-shaped steel form through-steel bars in the shear holes of the rib plate PBL, which can effectively solve the problem of difficult and poor positioning of through-steel bars in the shear holes of the PBL. The entire construction process is simple to operate and has high construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] Figure 1 It is a structural diagram of the steel pipe column in the present invention;

[0036] Figure 2 It is a structural diagram of the U-shaped steel of the composite beam in the present invention;

[0037] Figure 3 It is a structural schematic diagram of the composite slab prefabricated plate in the present invention;

[0038] Figure 4 It is a structural schematic diagram of the reinforcement plate in the present invention;

[0039] Figure 5 This is a schematic diagram of installing the U-shaped steel of the composite beam in the present invention;

[0040] Figure 6 Schematic diagram of the structure of the semi-ring stirrups in the present invention;

[0041] Figure 7 This is a schematic diagram of pouring completion in the present invention;

[0042] Figure 8 It is a structural schematic diagram of the support rod in the present invention;

[0043] Figure 9 It is a structural schematic diagram of the rotating ring in the present invention;

[0044] Figure 10 In the present invention Figure 9 A magnified view of point A in the figure;

[0045] Figure 11 It is a schematic structural diagram of the coil spring in the present invention;

[0046] Figure 12 is a flow chart of the first method in the present invention;

[0047] Figure 13 This is a flow chart of the second method in the present invention.

[0048] Figure: 1, steel pipe column; 1a, special-shaped anchor hole for steel bar; 1b, limiting hole for reinforcing plate; 2, U-shaped steel for composite beam; 2a, mounting hole for tension bolt; 3, rib plate; 4, stud connector; 5, precast plate for composite slab; 6, tension bolt; 7, semi-ring stirrup; 8, first longitudinal bar; 9, second longitudinal bar; 10, reinforcing plate; 10a, shear hole for reinforcing plate PBL; 11, anchor plate for composite special-shaped steel bar; 11a, anchor plate for first special-shaped steel bar; 11b, anchor plate for second special-shaped steel bar Fixed plate; 11c, third special-shaped steel bar anchor plate; 11d, fourth special-shaped steel bar anchor plate; 12, first temporary support; 13, second temporary support; 14, round steel bar anchor plate; 15, concrete; 16, worm gear; 17, support rod; 18, first cross bar; 19, second cross bar; 20, swivel; 21, base; 22, connecting line; 23, winding spring; 24, worm; 25, rotating rod; 26, take-up roller; 27, ratchet; 28, ratchet rod; 29, control lever. DETAILED DESCRIPTION

[0049] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0050] Example 1: Figures 1 to 7 As shown, a connection node of a steel tube concrete column, a composite beam and a composite plate according to an embodiment of the present invention is provided with a plurality of holes at corresponding positions of the steel tube column 1, the composite beam U-shaped steel 2 and the composite plate precast plate 5, including a special-shaped hole 1a for anchoring steel bars and a limiting hole 1b for the reinforcing plate. A plurality of local stiffening ribs are fixed by welding around the limiting hole 1b of the reinforcing plate of the steel tube column 1, a rib plate 3 is fixed by welding on the top of the bottom plate of the composite beam U-shaped steel 2, a plurality of rib plate PBL shear holes are provided on the rib plate 3, and a bolt connection is fixed by welding on the top of the top plate of the composite beam U-shaped steel 2. The connector 4 has a tension bolt mounting hole 2a opened near the bottom of the web of the composite beam U-shaped steel 2, and a threaded end portion of the bottom longitudinal reinforcement of the composite slab precast plate 5 is made and connected with a circular steel bar anchor plate 14. The first longitudinal reinforcement 8 of the composite beam U-shaped steel 2 and the second longitudinal reinforcement 9 of the composite slab precast plate 5 are threadedly connected with a composite special-shaped steel bar anchor plate 11, which are the first special-shaped steel bar anchor plate 11a, the second special-shaped steel bar anchor plate 11b, the third special-shaped steel bar anchor plate 11c and the fourth special-shaped steel bar anchor plate 11d, which can reduce the anchoring length and avoid bending the steel bars;

[0051] The relative positions of the steel pipe column 1 and the composite beam U-shaped steel 2 are fixed by welding, and a reinforcing plate 10 is arranged between the composite beam U-shaped steel 2 and the core concrete 15 of the steel pipe column 1 for effective connection. The first longitudinal reinforcement 8 of the composite beam U-shaped steel 2, the second longitudinal reinforcement 9 of the composite slab precast plate 5 and the core concrete 15 of the steel pipe column 1 are reliably anchored by the end composite special-shaped steel bar anchor plate 11. The first longitudinal reinforcement 8 on the composite beam U-shaped steel 2 and the second longitudinal reinforcement 9 on the composite slab precast plate 5 are positioned and tied by semi-ring stirrups 7 and steel bar anchor special-shaped holes 1a.

[0052] The rib plate PBL shear hole opened on the rib plate 3 has an opening diameter of not less than 2.5 times the diameter of the tension bolt 6 and not less than 35 mm. The tension bolt mounting hole 2a opened on the composite beam U-shaped steel 2 has an opening diameter not more than 0.5 mm larger than the diameter of the tension bolt 6. The opening positions of the rib plate PBL shear hole and the tension bolt mounting hole 2a are completely corresponding. This setting ensures that the concrete 15 can enter the rib plate PBL shear hole to form a concrete tenon of sufficient strength, and the tension bolt 6 can be installed smoothly, while realizing the fixation of the steel bars passing through the rib plate PBL shear hole.

[0053] The length of the reinforcing plate 10 extending into the steel pipe column 1 is less than 0.5 times the length of the short side of the steel pipe column 1, and the length extending into the composite beam U-shaped steel 2 is greater than 0.3 times the height of the composite beam U-shaped steel 2. The height of the reinforcing plate 10 is not less than the height of the rib plate 3 and not greater than 0.5 times the height of the composite beam U-shaped steel 2, ensuring that the positions of the reinforcing plates 10 in all directions in the steel pipe column 1 do not conflict, and that there is sufficient weld connection length between the reinforcing plate 10 and the composite beam U-shaped steel 2.

[0054] The extended length of the welded joints at both ends of the semi-ring stirrups 7 is not greater than 0.6 times the width of the top plate of the composite beam U-shaped steel 2 and not less than 30 mm, ensuring that the semi-ring stirrups 7 have sufficient weld connection length and do not affect the installation of the composite plate prefabricated panel 5.

[0055] The material of the combined special-shaped steel bar anchor plate 11 is the same as that of the steel bar, and the basic form is round-end shaped. The straight length of its long side is greater than 1.5 times the arc diameter of the short side, and the length of the short side is 5-10 mm larger than the diameter of the steel bar. The shape can also be elliptical, rectangular, etc., which is convenient for forming a reliable anchor in the steel pipe column 1.

[0056] The special-shaped steel bar anchoring hole 1a has the same shape as the combined special-shaped steel bar anchoring plate 11, and its size is no more than 0.5mm larger than that of the combined special-shaped steel bar anchoring plate 11, so as to minimize the weakening of the cross section of the steel pipe column 1.

[0057] The number of semi-annular stirrups 7 is the same as the second longitudinal reinforcement 9 of the composite slab precast plate 5 extending into the composite beam U-shaped steel 2, and their positions correspond to each other. This arrangement facilitates the rapid positioning and binding of the second longitudinal reinforcement 9 of the composite slab precast plate 5 to form a whole with the composite beam U-shaped steel 2.

[0058] The tension bolts 6 and the corresponding tension bolt mounting holes 2a are arranged in the longitudinal direction of the composite beam U-shaped steel 2 near the steel pipe column 1 at the node according to needs and are no less than two. This arrangement strengthens the connection performance between the steel inside the composite beam U-shaped steel 2 and the concrete 15 in the node area.

[0059] The composite slab prefabricated panel 5 is only a steel truss floor deck selected for the convenience of explanation and drawing. The present invention is applicable to any form of composite slab prefabricated panel 5.

[0060] Example 2: Figures 8 to 11 As shown in Comparative Example 1, another embodiment of the present invention is:

[0061] The first temporary support 12 includes a plurality of support rods 17 , on which a first cross bar 18 and a second cross bar 19 are rotatably mounted. The plurality of support rods 17 cooperate with the first cross bar 18 and the second cross bar 19 to form the first temporary support 12 .

[0062] There are four support rods 17, which are arranged in a rectangular array on the ground. Each support rod 17 is provided with a first cross bar 18 and a second cross bar 19. Every two support rods 17 are connected by two first cross bars 18 or two second cross bars 19, which can be connected by common bolts, such as Figure 8 shown.

[0063] A rotating rod 25 is rotatably installed inside each of the support rods 17, a rotating ring 20 for controlling the rotation of the rotating rod 25 is rotatably installed on the support rod 17, a worm 24 is rotatably installed on the rotating rod 25, and a worm gear 16 is fixedly installed on one end of the first cross bar 18 and the second cross bar 19 close to the support rod 17, the worm gear 16 is engaged with the worm gear 16, and the first cross bar 18 and the second cross bar 19 are in the same horizontal plane.

[0064] The worm 24 provided on each support rod 17 is engaged with the worm gear 16 on the first cross bar 18 and the second cross bar 19 at the same time. Therefore, when the worm 24 rotates, it will simultaneously drive the first cross bar 18 and the second cross bar 19 to rotate on the support rod 17. The rotation of the rotating rod 25 can be controlled by the rotating ring 20. By controlling the rotation direction of the rotating ring 20, the rotation trajectory of the first cross bar 18 and the second cross bar 19 can be controlled.

[0065] A base 21 is fixedly mounted on the bottom ends of the plurality of support rods 17 , a take-up roller 26 is rotatably mounted inside the base 21 , and a connecting line 22 is provided on both the base 21 and the take-up roller 26 .

[0066] There are four bases 21 and support rods 17. For the convenience of understanding (for example, the four bases 21 are the first base a, the second base b, the third base c and the fourth base d), the connecting line 22 set on the take-up roller 26 in the first base a is fixedly connected to the outer wall of the second base b, the connecting line 22 set on the take-up roller 26 in the second base b is fixedly connected to the outer wall of the third base c, the connecting line 22 set on the take-up roller 26 in the third base c is fixedly connected to the outer wall of the fourth base d, and the connecting line 22 set on the take-up roller 26 in the fourth base d is fixedly connected to the outer wall of the first base a. When the connecting line 22 of the take-up roller 26 in each base 21 is wound, the four bases 21 will be close to each other, which is convenient for regular storage.

[0067] A ratchet 27 is fixedly mounted on the outer wall of the take-up roller 26 , a ratchet rod 28 is elastically mounted inside the base 21 , a control rod 29 is fixedly mounted on the top of the ratchet rod 28 , and one end of the control rod 29 extends out of the outer wall of the base 21 .

[0068] The control rod 29 is rotatably installed inside the base 21 through a torsion spring. The setting of the torsion spring can make the control rod 29 drive the ratchet rod 28 to always keep blocking the ratchet 27. The set ratchet 27 can block the counterclockwise rotation of the take-up roller 26. When the four bases 21 are away from each other, the connecting line 22 will drive the take-up roller 26 to rotate clockwise. At this time, the ratchet rod 28 will not block the ratchet 27. Therefore, when you want to retract multiple bases 21, you need to rotate the control rod 29 to release the blocking of the ratchet rod 28 on the ratchet 27.

[0069] The top end of the take-up roller 26 is fixedly connected to a coil spring 23, and the other end of the coil spring 23 is fixedly connected to the inner wall of the base 21. When the multiple bases 21 move away from each other, the connecting line 22 will drive the take-up roller 26 to rotate clockwise. At this time, the coil spring 23 will be deformed and store elastic potential energy. At this time, by rotating the control lever 29, the ratchet rod 28 releases the blockage of the ratchet wheel 27, and the coil spring 23 will release the elastic potential energy, driving the take-up roller 26 to rotate counterclockwise and reel in the connecting line 22, thereby assisting in the storage of multiple bases 21.

[0070] like Figure 12-13 As shown, a construction method for a connection node of a steel tube concrete column, a composite beam and a composite plate is provided. The method uses the above-mentioned connection node of the steel tube concrete column, the composite beam and the composite plate, and includes the following steps:

[0071] Prefabrication work:

[0072] S1: Open multiple special-shaped steel bar anchor holes 1a and reinforcement plate limiting holes 1b on the steel pipe column 1, open tension bolt installation holes 2a on both sides of the composite beam U-shaped steel 2, weld ribs 3 to the bottom plate of the composite beam U-shaped steel 2, and open multiple rib PBL shear holes, open tension bolt installation holes 2a on the side wall of the composite beam U-shaped steel 2, and weld stud connectors 4 to the top plate of the composite beam U-shaped steel 2;

[0073] S2: Add the first longitudinal reinforcement 8 to the composite beam U-shaped steel 2 and the second longitudinal reinforcement 9 to the composite slab precast plate 5 on site, and connect the ends of the first longitudinal reinforcement 8 and the second longitudinal reinforcement 9 with a composite special-shaped steel bar anchor plate 11 by screw thread;

[0074] S3: Make an L-shaped reinforcement plate 10, open a plurality of reinforcement plate PBL shear holes 10a, and make a plurality of semi-ring stirrups 7;

[0075] On-site construction:

[0076] S4: Installation of beam and column components: hoist and install the steel pipe column 1, set up the first temporary support 12, hoist the composite beam U-shaped steel 2 to the top of the first temporary support 12, align the reinforcement plate 10 with the reinforcement plate limiting hole 1b opened on the steel pipe column 1, and push it into the steel pipe column 1, and weld the contact parts of the steel pipe column 1, the reinforcement plate 10 and the composite beam U-shaped steel 2;

[0077] S5: Beam reinforcement binding: Add the first longitudinal reinforcement 8 on site to the composite beam U-shaped steel 2 with the composite special-shaped steel bar anchor plate 11, align the first longitudinal reinforcement 8 with the steel bar anchor special-shaped hole 1a, and push it into the interior of the steel pipe column 1, so that the third special-shaped steel bar anchor plate 11c enters the steel bar anchor special-shaped hole 1a, rotate the first longitudinal reinforcement 8 on the composite beam U-shaped steel 2, and tighten the fourth special-shaped steel bar anchor plate 11d close to the inner side of the steel pipe column 1 wall toward the outer side of the pipe wall, then weld the semi-annular stirrups 7 to the top plate of the composite beam U-shaped steel 2, and tie it to the first longitudinal reinforcement 8 on the composite beam U-shaped steel 2, then pass the tension bolts 6 through the tension bolt installation holes 2a, the rib plate PBL shear holes and the reinforcement plate PBL shear holes 10a to complete the connection between the composite beam U-shaped steel 2 and the steel pipe column 1;

[0078] S6: Installation of the composite slab precast panel 5: Set up a second temporary support 13, hoist the composite slab precast panel 5 onto the second temporary support 13, align the second longitudinal reinforcement 9 of the composite slab precast panel 5 extending into the steel pipe column 1 with the steel bar anchoring special-shaped hole 1a, push the second longitudinal reinforcement 9 into the inside of the steel pipe column 1, rotate the second longitudinal reinforcement 9 and tie it to the steel bar truss to complete the connection between the composite slab precast panel 5 and the steel pipe column 1, and finally tie the second longitudinal reinforcement 9 extending into the composite beam U-shaped steel 2 to the semi-ring stirrup 7 to complete the connection between the composite slab precast panel 5 and the composite beam U-shaped steel 2;

[0079] S7: pour concrete 15 to the nodes of the steel tube column 1, the composite beam U-shaped steel 2 and the composite slab precast plate 5 to complete the connection of the steel tube concrete column, the composite beam and the composite slab node.

[0080] Working principle: Arrange multiple bases 21 in a rectangular array, control the rotation of the rotating rod 25 through the rotating ring 20, so that the worm 24 drives the first cross bar 18 and the second cross bar 19 to rotate on the support rod 17, and connect multiple first cross bars 18 and second cross bars 19 through bolts to form a first temporary support 12, hoist the composite beam U-shaped steel 2 to the top of the first temporary support 12, align the reinforcement plate 10 with the reinforcement plate limit hole 1b opened on the steel pipe column 1, and push it into the steel pipe column 1, so that the steel pipe column 1. Weld the contact parts of the reinforcement plate 10 and the composite beam U-shaped steel 2, attach the first longitudinal reinforcement 8 to the composite beam U-shaped steel 2 with the composite special-shaped steel bar anchor plate 11 on site, align the first longitudinal reinforcement 8 with the steel bar anchor special-shaped hole 1a, and push it into the interior of the steel pipe column 1, so that the third special-shaped steel bar anchor plate 11c enters the steel bar anchor special-shaped hole 1a, rotate the first longitudinal reinforcement 8 on the composite beam U-shaped steel 2, and tighten the fourth special-shaped steel bar anchor plate 11d on the inner side of the steel pipe column 1 wall to the outer side of the pipe wall, and then The semi-ring stirrups 7 are welded to the top plate of the composite beam U-shaped steel 2, and tied to the first longitudinal reinforcement 8 on the composite beam U-shaped steel 2. Then, the tension bolts 6 are passed through the tension bolt installation holes 2a, the rib plate PBL shear holes and the reinforcement plate PBL shear holes 10a to complete the connection between the composite beam U-shaped steel 2 and the steel pipe column 1. The second temporary support 13 is set, and the composite plate prefabricated plate 5 is hoisted onto the second temporary support 13. The second longitudinal reinforcement 9 of the composite plate prefabricated plate 5 extending into the steel pipe column 1 is connected to the steel bar anchoring special-shaped reinforcement. The holes 1a are aligned, and the second longitudinal reinforcement 9 is pushed into the inside of the steel pipe column 1. The second longitudinal reinforcement 9 is rotated and tied to the steel truss to complete the connection between the composite slab precast plate 5 and the steel pipe column 1. Finally, the second longitudinal reinforcement 9 extending into the composite beam U-shaped steel 2 is tied to the semi-annular stirrups 7 to complete the connection between the composite slab precast plate 5 and the composite beam U-shaped steel 2. Concrete 15 is poured to the nodes of the steel pipe column 1, the composite beam U-shaped steel 2 and the composite slab precast plate 5 to complete the node connection of the steel tube concrete column, the composite beam and the composite slab.

[0081] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0083] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A connection node of a steel tube concrete column, a composite beam and a composite slab, characterized by: It comprises a steel pipe column (1), a composite beam U-shaped steel (2), a composite plate prefabricated plate (5), a first temporary support (12) and a second temporary support (13); The steel pipe column (1) is provided with a steel bar anchoring special-shaped hole (1a) and a reinforcing plate limiting hole (1b); a bolt connector (4) is welded to the top of the composite beam U-shaped steel (2); tension bolt mounting holes (2a) are provided on both sides of the composite beam U-shaped steel (2); and a steel bar truss is provided on the composite plate prefabricated plate (5); A reinforcing plate (10) for inserting into a reinforcing plate limiting hole (1b) is welded to the inner bottom end of the composite beam U-shaped steel (2); the reinforcing plate (10) is arranged in an L-shape; a plurality of reinforcing plate PBL anti-shear holes (10a) are provided on the reinforcing plate (10); a rib plate (3) is welded to the inner bottom end of the composite beam U-shaped steel (2); and the rib plate (3) is provided with a rib plate PBL anti-shear hole; The composite beam U-shaped steel (2) is provided with a first longitudinal reinforcement (8), the composite slab precast plate (5) is provided with a second longitudinal reinforcement (9), and both ends of the first longitudinal reinforcement (8) and the second longitudinal reinforcement (9) are connected to a composite special-shaped steel bar anchoring plate (11) via a thread; The ends of the bottom longitudinal reinforcements of the composite slab prefabricated plate (5) are connected to circular reinforcement anchor plates (14) via threads; The combined special-shaped steel bar anchoring plate (11) is composed of a first special-shaped steel bar anchoring plate (11a), a second special-shaped steel bar anchoring plate (11b), a third special-shaped steel bar anchoring plate (11c), and a fourth special-shaped steel bar anchoring plate (11d); A semi-annular stirrup (7) for fixing the first longitudinal reinforcement (8) is welded to the top end of the composite beam U-shaped steel (2); A tension bolt (6) for penetrating the rib plate PBL anti-shear hole and the reinforcement plate PBL anti-shear hole (10a) is slidably installed inside the tension bolt installation hole (2a); The first temporary support (12) is used to support the composite slab precast plate (5), and the second temporary support (13) is used to support the composite beam U-shaped steel (2).

2. The connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 1, characterized in that: The diameter of the rib plate PBL anti-shear hole is not less than 2.5 times the diameter of the tension bolt (6) and not less than 35 mm, the diameter of the tension bolt mounting hole (2a) is not more than 0.5 mm larger than the bolt diameter, and the rib plate PBL anti-shear hole corresponds to the position of the tension bolt mounting hole (2a).

3. The connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 2, characterized in that: The length of one end of the reinforcing plate (10) extending into the steel pipe column (1) is less than 0.5 times the length of the short side of the steel pipe column (1), the length of the reinforcing plate (10) extending into the composite beam U-shaped steel (2) is greater than 0.3 times the height of the composite beam U-shaped steel (2), and the height of the reinforcing plate (10) is not less than the height of the rib plate (3) and not greater than 0.5 times the height of the composite beam U-shaped steel (2).

4. The connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 3, characterized in that: The outward extension length of the two welded ends of the semi-annular stirrups (7) is no more than 0.6 times the width of the top plate of the composite beam U-shaped steel (2) and no less than 30 mm.

5. The connection node of steel tube concrete column, composite beam and composite slab according to claim 4, characterized in that: The first temporary support (12) includes a plurality of support rods (17), each of which is rotatably mounted with a first cross bar (18) and a second cross bar (19). The plurality of support rods (17) cooperate with the first cross bar (18) and the second cross bar (19) to form the first temporary support (12).

6. The connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 5, characterized in that: A rotating rod (25) is rotatably mounted inside each of the plurality of support rods (17), a rotating ring (20) for controlling the rotation of the rotating rod (25) is rotatably mounted on the support rod (17), a worm (24) is rotatably mounted on the rotating rod (25), a worm gear (16) is fixedly mounted on one end of each of the first cross bar (18) and the second cross bar (19) close to the support rod (17), the worm gear (24) is meshed with the worm gear (16), and the first cross bar (18) and the second cross bar (19) are in the same horizontal plane.

7. The connection node of steel tube concrete column, composite beam and composite slab according to claim 6, characterized in that: The bottom ends of the plurality of support rods (17) are fixedly mounted with a base (21), a take-up roller (26) is rotatably mounted inside the base (21), and a connecting line (22) is provided on both the base (21) and the take-up roller (26).

8. The connection node of steel tube concrete column, composite beam and composite slab according to claim 7, characterized in that: A ratchet (27) is fixedly mounted on the outer wall of the take-up roller (26), a ratchet rod (28) is elastically mounted inside the base (21), a control rod (29) is fixedly mounted on the top end of the ratchet rod (28), and one end of the control rod (29) extends out of the outer wall of the base (21).

9. The connection node of steel tube concrete column, composite beam and composite slab according to claim 8, characterized in that: The top end of the take-up roller (26) is fixedly connected to a coil spring (23), and the other end of the coil spring (23) is fixedly connected to the inner wall of the base (21).

10. A method for constructing a connection node of a concrete-filled steel tube column, a composite beam, and a composite slab, the method using the connection node of the concrete-filled steel tube column, the composite beam, and the composite slab according to claim 9, characterized in that: The following steps are involved: S1: a plurality of steel bar anchoring special-shaped holes (1a) and reinforcing plate limiting holes (1b) are provided on the steel pipe column (1), tension bolt installation holes (2a) are provided on both sides of the composite beam U-shaped steel (2), ribs (3) are welded to the bottom plate of the composite beam U-shaped steel (2), and a plurality of rib PBL shear holes are provided, tension bolt installation holes (2a) are provided on the side wall of the composite beam U-shaped steel (2), and stud connectors (4) are welded to the top plate of the composite beam U-shaped steel (2); S2: adding a first longitudinal reinforcement (8) to the composite beam U-shaped steel (2) and adding a second longitudinal reinforcement (9) to the composite slab precast plate (5) on site, and connecting the ends of the first longitudinal reinforcement (8) and the second longitudinal reinforcement (9) with a composite special-shaped reinforcement anchor plate (11) by screw thread; S3: Making an L-shaped reinforcement plate (10), opening a plurality of reinforcement plate PBL shear holes (10a), and making a plurality of semi-annular stirrups (7); S4: Installation of beam and column components: hoist and install the steel pipe column (1), set up the first temporary support (12), hoist the composite beam U-shaped steel (2) to the top of the first temporary support (12), align the reinforcing plate (10) with the reinforcing plate limiting hole (1b) opened on the steel pipe column (1), and push it into the steel pipe column (1), and weld the contact parts of the steel pipe column (1), the reinforcing plate (10) and the composite beam U-shaped steel (2); S5: Beam reinforcement binding: attach the first longitudinal reinforcement (8) to the composite beam U-shaped steel (2) with the composite special-shaped reinforcement anchor plate (11) on site, align the first longitudinal reinforcement (8) with the reinforcement anchor special-shaped hole (1a), and push it into the interior of the steel pipe column (1), so that the third special-shaped reinforcement anchor plate (11c) enters the reinforcement anchor special-shaped hole (1a), rotate the first longitudinal reinforcement (8) on the composite beam U-shaped steel (2), and place it against the inner wall of the steel pipe column (1). The fourth special-shaped steel bar anchor plate (11d) in the direction is screwed to the outside of the pipe wall, and then the semi-annular stirrup (7) is welded to the top plate of the composite beam U-shaped steel (2), and tied and connected with the first longitudinal reinforcement (8) on the composite beam U-shaped steel (2), and then the tension bolt (6) is passed through the tension bolt installation hole (2a), the rib plate PBL shear hole and the reinforcement plate PBL shear hole (10a), completing the connection between the composite beam U-shaped steel (2) and the steel pipe column (1); S6: Installation of the composite plate precast plate (5): Set up a second temporary support (13), hoist the composite plate precast plate (5) onto the second temporary support (13), align the second longitudinal reinforcement (9) of the composite plate precast plate (5) inserted into the steel pipe column (1) with the steel bar anchoring special-shaped hole (1a), push the second longitudinal reinforcement (9) into the inside of the steel pipe column (1), rotate the second longitudinal reinforcement (9) and tie it with the steel bar truss to complete the connection between the composite plate precast plate 5 and the steel pipe column 1, and finally tie the second longitudinal reinforcement (9) inserted into the composite beam U-shaped steel (2) with the semi-ring stirrup (7) to complete the connection between the composite plate precast plate (5) and the composite beam U-shaped steel (2); S7: pouring concrete (15) to the nodes of the steel tube column (1), the composite beam U-shaped steel (2) and the composite slab precast plate (5), completing the connection of the steel tube concrete column, the composite beam and the composite slab node.

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