Concrete-filled steel tube column, composite beam and laminated slab connecting joint and construction method thereof

Abstract

The invention belongs to the technical field of fabricated buildings, and particularly relates to a concrete filled steel tubular column, composite beam and laminated slab connecting node and a construction method thereof.The concrete filled steel tubular column, composite beam and laminated slab connecting node comprises a steel tubular column, composite beam U-shaped steel, a laminated slab prefabricated slab, a first temporary support and a second temporary support, and steel bar anchoring special-shaped holes and reinforcing plate limiting holes are formed in the steel tubular column; a stud connecting piece is welded to the top end of the composite beam U-shaped steel, split bolt mounting holes are formed in the two sides of the composite beam U-shaped steel, a steel bar truss is arranged on the laminated slab prefabricated slab, and a reinforcing plate used for being inserted into a reinforcing plate limiting hole is welded to the bottom end of the interior of the composite beam U-shaped steel. The bearing capacity and anti-seismic performance of the composite beam U-shaped steel, the steel pipe column and the composite slab prefabricated slab node system can be effectively improved, the connecting performance of the steel pipe column and concrete is enhanced, local concentrated stress and weakening of the bearing capacity due to hole opening in the wall of the steel pipe column are avoided, and the construction requirement is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated buildings, and in particular 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 the main direction of green building promotion today. They are widely used in various types of buildings, which can significantly improve the efficiency of material utilization and reduce on-site wet operations. In civil buildings such as schools, hospitals, and office buildings, prefabricated frame structures are the most widely used, with advantages such as flexible layout and good structural integrity. In addition, due to its high bearing capacity, superior seismic performance, and convenient construction, the application rate of steel tube concrete columns in new buildings has gradually increased in recent years.

[0003] In the steel tube concrete column frame structure system, steel tube concrete columns, composite beam U-shaped steel and composite slabs are commonly used combinations, and the connection nodes of the three are the key and difficult points in design and construction. The connection nodes of steel tube concrete columns, composite beams and composite slabs are usually cast on site, and there are many types of steel bars tied on site, and the workload is large. The positioning accuracy of steel bar tying is often poor. In addition, the existing structure is mainly supported by the connection between the composite beam U-shaped steel and the steel tube column wall. The connection between the composite slab and the steel tube column, and the composite beam U-shaped steel and the core concrete of the steel tube concrete column is weak. In the elastic working stage of steel tube concrete, the synergistic working effect of steel tube and concrete is weak, which makes the outer plate of the steel tube column prone to local yielding and cannot meet the design requirements of "strong node, weak component".

[0004] To this end, the present invention provides a steel tube concrete column, a composite beam and a 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 comprises 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 column is provided with steel bar anchoring special-shaped holes and reinforcing plate limiting holes, the top of the composite beam U-shaped steel is welded with bolt connectors, both sides of the composite beam U-shaped steel are provided with tension bolt installation holes, and the composite plate prefabricated plate is provided with steel bar trusses;

[0008] A reinforcing plate for inserting the reinforcing plate limiting hole is welded at the inner bottom end of the composite beam U-shaped steel, the reinforcing plate is arranged in an L-shape, a plurality of reinforcing plate PBL anti-shear holes are opened on the reinforcing plate, and a rib plate is welded at the inner bottom end of the composite beam U-shaped steel, and a rib plate PBL anti-shear hole is opened on the rib plate;

[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 with a composite special-shaped steel bar anchor plate through threads;

[0010] The ends of the bottom longitudinal reinforcements of the composite slab precast slab are connected with round steel 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] A semi-ring stirrup for fixing the first longitudinal reinforcement is welded to the top of the U-shaped steel of the composite beam;

[0013] The tension bolt installation hole is slidably installed inside with tension bolts for penetrating the shear holes of the rib plate PBL and the shear holes of the reinforcing plate PBL;

[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 shear hole of the rib plate PBL shall correspond to the position of the tension bolt installation hole.

[0016] The length of one end of the reinforcing plate extending into the steel pipe column is less than 0.5 times the short side length of the steel pipe column, the length of the reinforcing 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 reinforcing 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 extended 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, and 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, a worm wheel is fixedly installed on one end of the first cross bar and the second cross bar close to the support rod, the worm wheel is meshed with the worm, and the first cross bar and the second cross bar are in the same horizontal plane.

[0020] A base is fixedly installed at the bottom ends of the plurality of support rods, a wire take-up roller is rotatably installed inside the base, and connecting wires are arranged 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 plate, comprising the following steps:

[0024] S1: Open multiple steel bar anchoring special-shaped holes and reinforcing plate limiting holes on the steel pipe column, open tension bolt installation holes on both sides of the composite beam U-shaped steel, weld ribs on 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 on the top plate of the composite beam U-shaped steel;

[0025] S2: adding a first longitudinal reinforcement to the composite beam U-shaped steel and a second longitudinal reinforcement to the composite slab precast plate on site, and connecting 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 reinforcement plate PBL shear holes, 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 reinforcing plate with the reinforcing plate limit hole opened on the steel pipe column, and push it into the steel pipe column, and weld the contact parts of the steel pipe column, the reinforcing plate and the composite beam U-shaped steel;

[0028] S5: Beam reinforcement binding: Add the first longitudinal reinforcement on site to the composite beam U-shaped steel with composite special-shaped steel bar anchor plate, align the first longitudinal reinforcement with the steel bar anchor special-shaped hole, and push it into the steel pipe column, so that the third special-shaped steel bar anchor plate enters the steel bar anchor special-shaped hole, rotate the first longitudinal reinforcement on the composite beam U-shaped steel, and tighten the fourth special-shaped steel bar anchor plate close to the inner side of the steel pipe column wall to 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 bind it with 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 plate: set up a second temporary support, hoist the composite slab precast plate onto the second temporary support, align the second longitudinal reinforcement of the composite slab precast plate extending into the steel pipe column with the steel bar anchoring 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 plate 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 stirrup to complete the connection between the composite slab precast plate 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. A steel tube concrete column, composite beam and composite slab connection node and its construction method described in the present invention, wherein a reinforcing 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 slab prefabricated plate, and a composite special-shaped steel bar anchor plate is arranged at the end, and the steel bar anchor special-shaped hole with a similar shape to the special-shaped steel bar anchor plate is opened on the inner wall of the steel tube column for installation, 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 opening 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 top of 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 slab precast plate node system, strengthen the connection performance between the steel pipe column and concrete, avoid local concentrated force and weakening of the bearing capacity due to the opening in the steel pipe column wall, and meet the construction requirements.

[0033] 2. The present invention discloses a steel tube concrete column, composite beam and composite slab connection node and a construction method thereof. After the prefabrication work is completed, the components are hoisted to the site, and the reinforcing plate, the steel tube column and the composite beam U-shaped steel are welded and connected. The welding workload is small. The first longitudinal reinforcement is arranged on the composite beam U-shaped steel and the second longitudinal reinforcement on the composite slab prefabricated plate is 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 in the shear holes of the rib plate PBL, which can effectively solve the problem of difficult positioning of the through-steel in the PBL shear holes and poor effect. The whole construction process is simple to operate and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0036] Figure 2 It is a structural schematic 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 is a schematic structural diagram of a reinforcing plate in the present invention;

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

[0040] Figure 6 It is a schematic diagram of the structure of the semi-ring stirrup in the present invention;

[0041] Figure 7 It 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] Fig. 9 It is a schematic diagram of the structure of the rotating ring in the present invention;

[0044] Fig.10 The present invention Fig. 9 A in the enlarged view;

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

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

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

[0048] Figure: 1, steel pipe column; 1a, steel bar anchoring special-shaped hole; 1b, reinforcing plate limiting hole; 2, composite beam U-shaped steel; 2a, tension bolt installation hole; 3, rib plate; 4, stud connector; 5, composite plate precast plate; 6, tension bolt; 7, semi-ring stirrup; 8, first longitudinal reinforcement; 9, second longitudinal reinforcement; 10, reinforcing plate; 10a, reinforcing plate PBL shear hole; 11, composite special-shaped steel bar anchor plate; 11a, first special-shaped steel bar anchor plate; 11b, second special-shaped steel bar anchor plate 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 rod. DETAILED DESCRIPTION

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

[0050] Embodiment 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 a steel tube column 1, a composite beam U-shaped steel 2 and a composite plate precast plate 5, including a steel bar anchoring special-shaped hole 1a and a reinforcing plate limiting hole 1b, a plurality of local stiffening ribs are fixed by welding around the reinforcing plate limiting hole 1b 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, a bolt connection rib is fixed by welding on the top of the top plate of the composite beam U-shaped steel 2 The connector 4 is provided with a tension bolt installation hole 2a at the web of the composite beam U-shaped steel 2 near the bottom, a thread is made at the end of the bottom longitudinal reinforcement of the composite plate precast plate 5 and a circular steel bar anchor plate 14 is connected, and a composite special-shaped steel bar anchor plate 11 is threadedly connected to the first longitudinal reinforcement 8 of the composite beam U-shaped steel 2 and the second longitudinal reinforcement 9 of the composite plate precast plate 5, which are respectively 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 combined special-shaped steel bar anchor plate 11, and 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-annular stirrups 7 and steel bar anchoring special-shaped holes 1a.

[0052] The rib plate PBL shear hole opened on the rib plate 3 has an opening diameter not less than 2.5 times the diameter of the tension bolt 6 and not less than 35mm. The tension bolt installation hole 2a opened on the composite beam U-shaped steel 2 has an opening diameter not more than 0.5mm larger than the diameter of the tension bolt 6. The opening positions of the rib plate PBL shear hole and the tension bolt installation 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 with 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 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. 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 slab precast 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-ended. 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 5-10mm 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 steel bar anchoring special-shaped 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 and the second longitudinal reinforcement 9 extending into the composite beam U-shaped steel 2 of the composite slab precast plate 5 are the same, and the positions are corresponding. 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 installation holes 2a are arranged along the longitudinal direction of the composite beam U-shaped steel 2 in the node area near the steel pipe column 1 according to needs and are not 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 precast panel 5 is only a steel bar truss floor deck selected for the convenience of explanation and drawing. The present invention is applicable to any form of composite slab precast panel 5.

[0060] Embodiment 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, and can be connected by common bolts, such as Figure 8 shown.

[0063] A rotating rod 25 is rotatably installed inside each of the multiple 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, a worm wheel 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 24 is meshed with the worm wheel 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 meshed 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 drive the first cross bar 18 and the second cross bar 19 to rotate on the support rod 17 at the same time. 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 wire take-up roller 26 is rotatably mounted inside the base 21 , and a connecting line 22 is disposed on both the base 21 and the wire take-up roller 26 .

[0066] There are four bases 21 and four support rods 17 for easy 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 wire-taking 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 wire-taking 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 wire-taking 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 wire-taking 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 wire-taking roller 26 in each base 21 is wound, the four bases 21 will be close to each other for easy and orderly 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] A coil spring 23 is fixedly connected to the top of the take-up roller 26, 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 lever 28 releases the obstruction 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 the multiple bases 21.

[0070] like Figure 12-13 As shown, a construction method for connecting a steel tube concrete column, a composite beam and a composite plate, the method adopts the above-mentioned steel tube concrete column, the composite beam and the composite plate connection node, and comprises the following steps:

[0071] Prefabrication work:

[0072] S1: A plurality of steel bar anchoring special-shaped holes 1a and reinforcing plate limiting holes 1b are opened on the steel pipe column 1, tension bolt installation holes 2a are opened on both sides of the composite beam U-shaped steel 2, ribs 3 are welded on the bottom plate of the composite beam U-shaped steel 2, and a plurality of ribs PBL shear holes are opened, tension bolt installation holes 2a are opened on the side wall of the composite beam U-shaped steel 2, and stud connectors 4 are welded on 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: 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;

[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 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;

[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 reinforcement anchor plate 11, align the first longitudinal reinforcement 8 with the reinforcement anchor special-shaped hole 1a, and push it into 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 tighten the fourth special-shaped reinforcement anchor plate 11d close to the inner side of the steel pipe column 1 toward the outer side of the pipe wall, then weld the semi-annular stirrup 7 to the top plate of the composite beam U-shaped steel 2, and bind it with the first longitudinal reinforcement 8 on the composite beam U-shaped steel 2, then pass the tension bolt 6 through the tension bolt installation hole 2a, the rib plate PBL shear hole and the reinforcement plate PBL shear hole 10a, and 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 plate 5: set up a second temporary support 13, hoist the composite slab precast plate 5 onto the second temporary support 13, align the second longitudinal reinforcement 9 of the composite slab precast plate 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 plate 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-annular stirrup 7 to complete the connection between the composite slab precast plate 5 and the composite beam U-shaped steel 2;

[0079] 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 to complete the connection of the steel tube concrete column, the composite beam and the composite slab node.

[0080] Working principle: by arranging multiple bases 21 in a rectangular array, controlling 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 connecting multiple first cross bars 18 and second cross bars 19 through bolts to form a first temporary support 12, hoisting the composite beam U-shaped steel 2 to the top of the first temporary support 12, aligning the reinforcing plate 10 with the reinforcing plate limiting hole 1b opened on the steel pipe column 1, and pushing it into the steel pipe column 1, the steel pipe column 1. The contact parts of the reinforcing plate 10 and the composite beam U-shaped steel 2 are welded, and the first longitudinal reinforcement 8 is added on site to the composite beam U-shaped steel 2 with the composite special-shaped steel bar anchor plate 11. The first longitudinal reinforcement 8 is aligned with the steel bar anchoring special-shaped hole 1a and pushed into the interior of the steel pipe column 1, so that the third special-shaped steel bar anchor plate 11c enters the steel bar anchoring special-shaped hole 1a, the first longitudinal reinforcement 8 on the composite beam U-shaped steel 2 is rotated, and the fourth special-shaped steel bar anchor plate 11d close to the inner side of the steel pipe column 1 is tightened toward the outer side of the pipe wall, and then The semi-annular stirrups 7 are 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. 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 precast panel 5 is hoisted onto the second temporary support 13. The second longitudinal reinforcement 9 of the composite plate precast panel 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 precast panel 5 and the steel pipe column 1. Finally, the second longitudinal reinforcement 9 extending into the U-shaped steel 2 of the composite beam is tied to the semi-annular stirrups 7 to complete the connection between the precast panel 5 and the U-shaped steel 2 of the composite beam. Concrete 15 is poured to the nodes of the steel pipe column 1, the U-shaped steel 2 of the composite beam and the precast panel 5 of the composite panel to complete the node connection of the steel tube concrete column, the composite beam and the composite panel.

[0081] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 should not be understood as limiting the scope of protection of the present invention.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A connection node of a steel tube concrete column, a composite beam and a composite plate, characterized in that: 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 a rib plate PBL anti-shear hole is provided on the rib plate (3); The composite beam U-shaped steel (2) is provided with a first longitudinal reinforcement (8), the composite slab prefabricated 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 threads; 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 prefabricated plate (5), and the second temporary support (13) is used to support the composite beam U-shaped steel (2).

2. A 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. The rib plate PBL anti-shear hole corresponds to the tension bolt mounting hole (2a) in position.

3. A 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. A connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 3, characterized in that: The extended 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. A connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 4, characterized in that: The first temporary support (12) comprises a plurality of support rods (17), on each of 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).

6. A 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 wheel (16) is fixedly mounted on one end of the first cross bar (18) and the second cross bar (19) close to the support rod (17), the worm wheel (24) is meshed with the worm wheel (16), and the first cross bar (18) and the second cross bar (19) are in the same horizontal plane.

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

8. A connection node of a steel tube concrete column, a composite beam and a composite slab according to claim 7, characterized in that: A ratchet wheel (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. A connection node of a steel tube concrete column, a composite beam and a 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 construction method for a connection node of a steel tube concrete column, a composite beam and a composite plate, the method using the steel tube concrete column, the composite beam and the composite plate connection node as claimed in 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), a rib plate (3) is welded on the bottom plate of the composite beam U-shaped steel (2), a plurality of rib plate 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 a bolt connector (4) is welded on 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 means of threads; S3: manufacturing an L-shaped reinforcement plate (10), opening a plurality of reinforcement plate PBL shear holes (10a), and manufacturing 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) on site to the composite beam U-shaped steel (2) with the composite special-shaped reinforcement anchor plate (11), 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 close to 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), so as to complete the connection between the composite beam U-shaped steel (2) and the steel pipe column (1); S6: Installation of the composite slab precast plate (5): a second temporary support (13) is provided, the composite slab precast plate (5) is hoisted onto the second temporary support (13), the second longitudinal reinforcement (9) of the composite slab precast plate (5) extending into the steel pipe column (1) is aligned with the steel bar anchoring special-shaped hole (1a), 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 and connected with the steel bar truss, and the composite slab precast plate 5 is connected with the steel pipe column 1, and finally the second longitudinal reinforcement (9) extending into the composite beam U-shaped steel (2) is tied and connected with the semi-annular stirrup (7), and the composite slab precast plate (5) is connected with 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 precast plate of the composite slab (5), completing the connection of the steel tube concrete column, the composite beam and the composite slab node.

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