Combined beam-column joint adopting variable cross-section T-shaped limb and construction method of combined beam-column joint

Abstract

The invention discloses a combined beam-column joint adopting a variable-cross-section T-shaped limb and a construction method thereof, and belongs to the technical field of fabricated buildings, the technical key points are as follows: the construction method comprises the following steps: A1, arranging a stiffening rib on the inner side of a steel pipe column, and welding a double-T-shaped rib plate on the top of a U-shaped steel bottom plate of a combined beam; welding a stud connecting piece at the top of the U-shaped steel plate of the composite beam; manufacturing a bent anchoring section at the end part of the bottom layer steel bar of the prefabricated floor support plate; welding a steel bar connecting plate at the end part of the U-shaped steel of the composite beam; a2, the steel pipe column is hoisted and installed, then a temporary support is erected, the composite beam U-shaped steel is hoisted to the temporary support, and then the steel bar connecting plate, the top of the composite beam U-shaped steel and the steel pipe column are welded; a3, the additional steel bars are welded to the steel bar connecting plates according to design requirements; through the structural cooperation, the overall structural strength can be effectively improved, meanwhile, the construction efficiency is improved, meanwhile, after concrete curing is completed, the temporary supports are detached and used for the next construction layer, and the design concepts of resource saving and sustainable development are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled buildings, and in particular to a connection node between a steel-concrete composite beam and a steel tube concrete column 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, which is labor-intensive. The positioning accuracy of steel bar tying is often poor, and the existing connection mainly adopts the method of opening holes in the wall of steel tube columns and extending some components of composite beams into steel tube columns for anchoring connection. However, the hole opening in the wall of this method greatly weakens the bearing capacity and ductility of steel tube columns.

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

[0005] In order to make up for the shortcomings of the prior art and solve at least one technical problem raised in the background technology, a composite beam-column node using a variable-section T-shaped limb and a construction method thereof are provided. The present invention is a connection node between a steel-concrete composite beam and a steel tube concrete column using a variable-section T-shaped limb and a construction method thereof.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a composite beam-column node using a variable-section T-shaped limb and a construction method thereof according to the present invention comprises the following steps:

[0007] A1. Set stiffening ribs on the inner side of the steel pipe column, weld double T-shaped ribs on the top of the U-shaped steel bottom plate of the composite beam; weld stud connectors on the top of the U-shaped steel of the composite beam; make bent anchor sections at the ends of the bottom steel bars of the prefabricated floor slab; weld steel bar connection plates at the ends of the U-shaped steel of the composite beam;

[0008] A2. Hoist and install the steel pipe column, then set up temporary support, hoist the composite beam U-shaped steel to the temporary support, and then weld the steel bar connecting plate, composite beam U-shaped steel top and steel pipe column;

[0009] A3. Weld the additional steel bars to the steel bar connection plate according to the design requirements;

[0010] A4. Install the floor support at the bottom of the prefabricated floor deck, hoist the prefabricated floor deck to the corresponding position, align the reinforcing steel bars with the PBL shear holes, push the reinforcing steel bars into the PBL shear holes, and then tie and connect the reinforcing steel bars with the prefabricated floor deck steel trusses and additional steel bars;

[0011] A5. Pour the node steel tube column, composite beam U-shaped steel and precast floor slab concrete to complete the node connection of steel tube column concrete column, composite beam U-shaped steel and precast floor slab.

[0012] A connection node between a steel-concrete composite beam and a steel tube concrete column, the connection node being applied to the construction method of the connection node between the steel-concrete composite beam and the steel tube concrete column, comprising a steel tube column, a stiffening rib, a composite beam U-shaped steel, a double T-shaped rib plate, a stud connector, a steel bar connection plate, a prefabricated floor deck, additional steel bars, reinforced steel bars, a temporary support, a floor support portion and cast-in-place concrete;

[0013] The two ends of the stiffening rib are respectively connected to two adjacent right-angle sides of the inner wall of the steel pipe column;

[0014] The double T-shaped rib plate includes a low rib plate in the mid-span section, a high rib plate in the inflection section, and PBL shear holes;

[0015] The low rib plate in the middle of the span is fixedly installed inside the U-shaped steel of the composite beam, one end of the high rib plate in the anti-bending section is fixedly connected to the low rib plate in the middle of the span, and the PBL shear holes are respectively opened on the outer walls of the low rib plate in the middle of the span and the high rib plate in the anti-bending section;

[0016] The steel bar connection plate is fixedly installed on the outer wall of the U-shaped steel of the composite beam, and the additional steel bar is fixedly installed on the outer wall of the steel bar connection plate;

[0017] The reinforcing steel bar is set on the prefabricated floor deck, and one end passes through the PBL shear hole;

[0018] Temporary supports are used to support the U-shaped steel of the composite beam;

[0019] The floor support part is used to support the prefabricated floor decking.

[0020] Preferably, the height of the high rib plate in the reverse bending section is not less than 2 / 3 of the height of the U-shaped steel of the composite beam and not greater than the height of the additional steel bars, and the length of the high rib plate in the reverse bending section is not less than 500 mm and not greater than 1 / 4 of the total length of the beam;

[0021] The height of the low rib plate in the mid-span section is not greater than 1 / 3 of the height of the U-shaped steel of the composite beam. A transition section is provided between the low rib plate in the mid-span section and the high rib plate in the anti-bend section. The angle between the transition section and the horizontal plane is in the range of 30°-45°.

[0022] Preferably, a transition wing plate is provided near the steel bar connection plate at the high rib plate of the reverse bending section, and the width of the end of the transition wing plate is not greater than 50 mm of the steel bar connection plate;

[0023] The diameter of the PBL shear hole shall not be less than 2.5 times the diameter of the reinforcement bar and not less than 35mm;

[0024] The width of the steel bar connecting plate is 50-100mm larger than the width of the U-shaped steel of the composite beam, and the thickness is not less than the wall thickness of the steel pipe column.

[0025] Preferably, the floor support portion includes a control portion, a connecting tube and a support plate;

[0026] One end of the connecting tube is used to connect with the movable end of the control unit, and the supporting plate is fixedly connected with the other end of the connecting tube;

[0027] The outer wall of the support plate is fixedly mounted with a mounting cylinder, the inner wall of the mounting cylinder is fixedly mounted with a laser emitting module, the radial outer wall of the mounting cylinder is rotatably mounted with a closing cylinder, and the outer wall of the closing cylinder is provided with an avoidance hole adapted to the laser emitting module.

[0028] Preferably, a limit pin is provided on the outer wall of the connecting tube, and both the outer wall of the connecting tube and the outer wall of the movable end of the control part have through holes for the limit pin to be inserted into;

[0029] A control plate is elastically mounted on the inner wall of the connecting cylinder, a guide block is fixedly mounted on the inner wall of the closing cylinder, and the guide block is elastically connected to the outer wall of the mounting cylinder;

[0030] A traction rope connected with the guide block is fixedly installed on the outer wall of the control panel.

[0031] Preferably, a wiping sheet is fixedly mounted on the inner wall of the sealing cylinder;

[0032] A wiping roller is rotatably mounted on the inner wall of the mounting cylinder, and the radial outer wall of the wiping roller is in rolling contact with the outer wall of the wiping sheet;

[0033] A storage cylinder for storing cleaning liquid is fixedly installed on the inner wall of the installation cylinder, and the cleaning liquid is provided to the wiping roller through the storage cylinder.

[0034] Preferably, a mounting platform is fixedly mounted on the inner wall of the mounting cylinder, and a sponge layer that fits the wiping roller is provided on the inner wall of the mounting platform;

[0035] A transfer cylinder is fixedly mounted on the inner wall of the mounting cylinder, and the inner cavity of the transfer cylinder is communicated with the inner cavity of the mounting platform;

[0036] A connecting tube is fixedly mounted on the bottom surface of the adapter tube, and the other end of the connecting tube is communicated with the inner cavity of the storage tube.

[0037] Preferably, a control plug is elastically mounted on the inner wall of the adapter tube, an upper one-way piece is elastically mounted on the upper end surface of the control plug, and a lower one-way piece is elastically mounted on the bottom of the adapter tube.

[0038] Preferably, a control wheel is rotatably mounted on the inner wall of the mounting cylinder, a control ring is fixedly mounted on the inner wall of the closing cylinder, and the inner wall of the control ring fits with the outer wall of the control wheel;

[0039] A mounting shaft is fixedly installed at the bottom of the control wheel. The mounting shaft penetrates the wiping roller and is fixedly connected with the wiping roller. A radial outer wall rope of the mounting shaft is connected with the control plug.

[0040] The beneficial effects of the present invention are as follows:

[0041] 1. The beam-column-slab node system proposed in the present invention has excellent bearing capacity and seismic performance. A double T-shaped rib plate is welded on the top of the U-shaped steel bottom plate of the composite beam. The double T-shaped rib plate is a high rib plate in the anti-bend section near the beam-column-slab node, and a low rib plate in the mid-span section at the mid-span of the beam. The steel pipe column is welded to the U-shaped steel flange and the steel bar connecting plate of the composite beam. The steel pipe column is welded with local stiffening ribs inside the pipe wall at the connection position of the connection node. These connection methods can significantly increase the bearing capacity and seismic performance of the beam-column-slab node system, strengthen the connection performance between steel and concrete, and avoid local concentrated force and the weakening of the bearing capacity by opening holes in the column wall of the steel pipe column, so as to meet the construction requirements;

[0042] 2. The beam-column-slab node system proposed by the present invention has high construction efficiency and construction accuracy. There is no complicated prefabrication work for the inner wall of the steel pipe column in the factory prefabrication work. After the prefabrication work is completed, the components are hoisted to the site, and the steel bar connecting plate, the composite beam and the steel pipe column are welded and connected. The welding workload is small. The composite beam is welded to the steel bar connecting plate on site with additional longitudinal reinforcement. The longitudinal reinforcement of the composite plate passes through the double T-shaped rib plate PBL holes, which is quickly and accurately positioned and tied. The entire construction process is simple to operate and the construction efficiency is high.

[0043] 3. The beam-column-slab node system proposed by the present invention does not require construction templates and consumes less materials. The composite beam U-shaped steel and the composite slab bottom plate can replace the beam-column-slab node construction template. During the construction process, only temporary supports need to be set up on the composite beam and the composite slab bottom plate to complete the entire construction process. After the concrete curing is completed, the temporary supports are dismantled for use in the next construction layer, which has the design concept of saving resources and sustainable development;

[0044] 4. The present invention arranges an installation tube and a closing plate, and a laser emitting module is fixedly installed on the inner wall of the installation tube. The laser emitting module is a common laser level. When supporting the prefabricated floor decking, it is necessary to support it simultaneously through multiple floor support parts, and by adjusting the height of each support plate, and using the laser emitting module to detect the horizontal condition of the bottom surface of the prefabricated floor decking. Compared with the prior art that can only support the floor and requires manual support and adjustment, it can not only effectively improve the efficiency of supporting the prefabricated floor decking, but also can calibrate the level of the bottom surface of the prefabricated floor decking. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] Figure 1 It is a flow chart of the construction method in the present invention;

[0047] Figure 2 is a schematic diagram of a steel pipe column of the present invention;

[0048] Figure 3 It is a schematic diagram of the U-shaped steel prefabricated part of the composite beam of the present invention;

[0049] Figure 4 is a schematic diagram of a prefabricated floor deck of the present invention;

[0050] Figure 5 It is a schematic diagram of a double T-shaped rib plate of the present invention;

[0051] Figure 6 This is a schematic diagram of the U-shaped steel reinforcement cage for installing a composite beam of the present invention;

[0052] Figure 7 Schematic diagram of the combination of U-shaped steel and double T-shaped ribs of the composite beam of the present invention

[0053] Figure 8 This is a schematic diagram of the pouring completion of the present invention;

[0054] Fig. 9 It is a schematic diagram of the overall structure of the floor support part of the present invention;

[0055] Fig.10 is a schematic diagram of a guide block in the present invention;

[0056] Fig.11 is an exploded view of the closed cylinder in the present invention;

[0057] Fig.12 is a cross-sectional view of the connecting tube in the present invention;

[0058] Fig.13 is a cross-sectional view of the installation tube in the present invention;

[0059] Fig.14 is a cross-sectional view of the storage tube in the present invention;

[0060] Fig.15 yes Fig.14 A magnified view of the structure in the middle.

[0061] In the figure: 1, steel pipe column; 1a, stiffening rib;

[0062] 2. Composite beam U-shaped steel;

[0063] 3. Double T-shaped ribs; 3a. Low ribs in the mid-span section; 3b. High ribs in the anti-bend section; 3c. PBL shear holes;

[0064] 4. Stud connector;

[0065] 5. Steel bar connection plate;

[0066] 6. Prefabricated floor decking;

[0067] 7. Additional reinforcement;

[0068] 8. Strengthen steel bars;

[0069] 9. Temporary support;

[0070] 10. Floor support;

[0071] 11. Cast-in-place concrete;

[0072] 111. Control unit; 112. Connecting cylinder; 113. Limit pin; 114. Closing cylinder; 115. Support plate; 116. Avoidance hole; 117. Storage cylinder; 118. Guide block; 119. Mounting cylinder; 120. Laser emission module; 121. Wiping sheet; 122. Control ring; 123. Control board; 124. Wiping roller; 125. Control wheel; 126. Connecting tube; 127. Adapter cylinder; 128. Mounting table; 129. Mounting shaft; 130. Upper one-way sheet; 131. Control plug; 132. Lower one-way sheet; 133. Traction rope. DETAILED DESCRIPTION

[0073] 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.

[0074] like Figure 1 As shown, the construction method of the connection node between the steel-concrete composite beam and the steel tube concrete column of the present invention comprises the following steps:

[0075] Prefabrication work:

[0076] A1. Set stiffening ribs 1a on the inner side of the steel pipe column 1, weld double T-shaped ribs 3 on the top of the bottom plate of the composite beam U-shaped steel 2; weld stud connectors 4 on the top of the composite beam U-shaped steel top 2; make bent anchor sections at the ends of the bottom steel bars of the prefabricated floor deck 6; weld steel bar connection plates 5 at the ends of the composite beam U-shaped steel 2;

[0077] On-site construction:

[0078] A2, hoist and install the steel pipe column 1, then set up the temporary support 9, hoist the composite beam U-shaped steel 2 to the temporary support 9, and then weld the steel bar connecting plate 5, the composite beam U-shaped steel top 2 and the steel pipe column 1;

[0079] A3. Weld the additional steel bars 7 to the steel bar connection plate 5 according to the design requirements;

[0080] A4. Set a floor support part 10 at the bottom of the prefabricated floor deck 6, hoist the prefabricated floor deck 6 to the corresponding position, align the reinforcing steel bar 8 with the PBL shear hole 3c, push the reinforcing steel bar 8 into the PBL shear hole 3c, and then tie and connect the reinforcing steel bar 8 with the prefabricated floor deck 6 steel bar truss and the additional steel bar 7;

[0081] A5. Pour concrete into the node steel tube column 1, the composite beam U-shaped steel 2 and the prefabricated floor deck 6 to complete the node connection of the steel tube column 1 concrete column, the composite beam U-shaped steel 2 and the prefabricated floor deck 6.

[0082] like Figure 2-15 As shown, a connection node between a steel-concrete composite beam and a steel tube concrete column, which is applied to the construction method of the connection node between a steel-concrete composite beam and a steel tube concrete column, includes a steel tube column 1, a stiffening rib 1a, a composite beam U-shaped steel 2, a double T-shaped rib plate 3, a low rib plate 3a at the mid-span section, a high rib plate 3b at the anti-bend section, a PBL shear hole 3c, a bolt connector 4, a steel bar connection plate 5, a prefabricated floor deck 6, additional steel bars 7, reinforcing steel bars 8, a temporary support 9, a floor support portion 10, and cast-in-place concrete 11.

[0083] By arranging stiffening ribs 1a on the inner side of the steel pipe column 1, welding double T-shaped ribs 3 on the top of the bottom plate of the composite beam U-shaped steel 2, the cross-sectional height of the double T-shaped ribs 3 changes along the longitudinal direction of the beam, and opening a plurality of PBL shear holes 3c on the double T-shaped ribs 3, welding stud connectors 4 on the top of the top plate of the composite beam U-shaped steel 2, making a bent anchoring section at the end of the bottom longitudinal reinforcement of the prefabricated floor deck 6, and welding a steel bar connecting plate 5 on the end of the composite beam U-shaped steel 2; the relative positions of the steel pipe column 1, the composite beam U-shaped steel 2, and the steel bar connecting plate 5 are fixed by welding, the relative positions of the composite beam U-shaped steel additional steel bars 7 and the steel bar connecting plate 5 are fixed by welding, the composite beam U-shaped steel additional steel bars 8 on site on the composite slab pass through the PBL shear holes 3c, and are tied and connected with the composite beam additional steel bars 7 and the prefabricated floor deck 6 reinforcement steel bars 8.

[0084] The double T-shaped rib 3 is a high rib 3b of the reverse bending section on the side close to the beam-column-slab node, and its height is not less than 2 / 3 of the U-shaped steel 2 of the composite beam, and not greater than the height of the additional steel bars 7 installed on site of the U-shaped steel 2 of the composite beam, and its length is not less than 500mm, and not greater than 1 / 4 of the total length of the beam. The double T-shaped rib 3 is a low rib 3a of the mid-span section on the side of the beam span, and its height is not greater than 1 / 3 of the height of the U-shaped steel of the composite beam. A transition section is provided between the high rib 3b of the reverse bending section and the low rib 3a of the mid-span section, and the angle between the transition section and the horizontal plane is in the range of 30-45 degrees. This setting ensures that the double T-shaped rib 3 has a tensile part in both the positive and negative bending moment sections, and avoids excessive tensile stress on the concrete and cracking.

[0085] A transition wing plate is arranged near the steel bar connecting plate 5 at the high rib plate 3b of the reverse bending section, and the width of the transition wing plate end is not greater than 550mm of the steel bar connecting plate. This arrangement ensures that the end of the double T-shaped rib plate 3 and the steel bar connecting plate 5 have sufficient welding length to ensure the connection quality.

[0086] The PBL shear hole 3c formed in the double T-shaped rib plate 3 has a hole diameter not less than 2.5 times the diameter of the reinforcing steel bar 8 and not less than 35 mm. This arrangement ensures that concrete can enter the PBL shear hole 3c to form a concrete tenon of sufficient strength.

[0087] The steel bar connecting plate 5 is 50-100 mm wider than the width of the composite beam U-shaped steel 2 and its thickness is not less than the wall thickness of the steel pipe column 1. This arrangement facilitates welding and ensures welding quality.

[0088] The composite slab precast plate 6 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 plates.

[0089] As a preferred embodiment of the present invention, the floor support part 10 includes a control part 111 , a connecting tube 112 and a support plate 115 .

[0090] One end of the connecting tube 112 is used to connect to the movable end of the control unit 111, wherein the control unit 111 is composed of a hydraulic cylinder and a control box, and the support plate 115 is fixedly connected to the other end of the connecting tube 112, and the support plate 115 is installed on the movable end of the hydraulic cylinder through the connecting tube 112.

[0091] When supporting the prefabricated floor deck 6, the support plate 115 is installed on the movable end of the control unit 111, and the hydraulic cylinder is controlled to extend until the support plate 115 is in contact with the bottom of the prefabricated floor deck 6 to support the prefabricated floor deck 6. When the reinforcing steel bar 8 is inserted into the PBL shear hole 3c, the height of the reinforcing steel bar 8 is adjusted by adjusting the movable end of the control unit 111 to facilitate the alignment of the auxiliary reinforcing steel bar 8 and the PBL shear hole 3c, thereby improving the construction efficiency.

[0092] The outer wall of the support plate 115 is fixedly mounted with a mounting tube 119 , which is sleeved on the outer wall of the support plate 115 . When supporting the prefabricated floor decking plate 6 , the axial end of the mounting tube 119 is not subjected to force.

[0093] A laser emitting module 120 is fixedly installed on the inner wall of the mounting tube 119. The laser emitting module 120 is a common laser level. When supporting the prefabricated floor decking 6, it is necessary to support it simultaneously through multiple floor support parts 10, and by adjusting the height of each support plate 115, and using the laser emitting module 120 to detect the horizontal condition of the bottom surface of the prefabricated floor decking 6. Compared with the patent CN220621208U, a building construction support device can only support floor slabs and requires manual support and adjustment. It can not only effectively improve the efficiency of supporting the prefabricated floor decking 6, but also calibrate the level of the bottom surface of the prefabricated floor decking 6.

[0094] The radial outer wall of the mounting cylinder 119 is rotatably mounted with a closing cylinder 114, and the outer wall of the closing cylinder 114 is provided with an avoidance hole 116 adapted to the laser emitting module 120. The laser emitting end of the laser emitting module 120 is closed by the closing cylinder 114 to prevent the laser emitting end of the laser emitting module 120 from being scratched. When it is needed, the closing cylinder 114 is rotated until the avoidance hole 116 moves to the laser emitting end of the laser emitting module 120 to facilitate laser emission.

[0095] A limit pin 113 is provided on the outer wall of the connecting tube 112. Both the outer wall of the connecting tube 112 and the outer wall of the movable end of the control part 111 have through holes for the limit pin 113 to be inserted into. After the connecting tube 112 and the movable end of the control part 111 are inserted into each other, the limit pin 113 penetrates the connecting tube 112 to realize the connection between the connecting tube 112 and the movable end of the control part 111.

[0096] A control board 123 is elastically mounted on the inner wall of the connecting tube 112 . The control board 123 is connected to the connecting tube 112 via a spring. When the connecting tube 112 is plugged into the movable end of the control unit 111 , the movable end of the control unit 111 pushes the control board 123 .

[0097] A guide block 118 is fixedly mounted on the inner wall of the sealing cylinder 114 . The guide block 118 is elastically connected to the outer wall of the mounting cylinder 119 . The guide block 118 is connected to the mounting cylinder 119 via a spring.

[0098] A traction rope 133 connected to the guide block 118 is fixedly installed on the outer wall of the control board 123. The traction rope 133 is in a tensioned state in the initial state. When the movable end of the control part 111 is inserted into the connecting tube 112, the control board 123 slides. At this time, the guide block 118 drives the closing tube 114 to rotate under the elastic force until the avoidance hole 116 moves to the laser emitting end of the laser emitting module 120 to facilitate laser emission, and then the laser emitting end of the laser emitting module 120 is automatically exposed when the movable end of the control part 111 is inserted into the connecting tube 112.

[0099] As a preferred embodiment of the present invention, a wiping sheet 121 is fixedly installed on the inner wall of the closed cylinder 114. When the closed cylinder 114 is rotated, the laser emitting end of the laser emitting module 120 is wiped by the wiping sheet 121 to clean the laser emitting end of the laser emitting module 120.

[0100] A wiping roller 124 is rotatably mounted on the inner wall of the mounting cylinder 119 , and the radial outer wall of the wiping roller 124 rolls in contact with the outer wall of the wiping sheet 121 , so that the wiping roller 124 is moistened, thereby moistening the wiping sheet 121 , thereby improving the cleaning efficiency of the laser emitting end of the laser emitting module 120 .

[0101] A storage cylinder 117 for storing cleaning liquid is fixedly mounted on the inner wall of the mounting cylinder 119 , and the cleaning liquid is provided to the wiping roller 124 through the storage cylinder 117 .

[0102] The inner wall of the mounting cylinder 119 is fixedly mounted with a mounting platform 128 , and the inner wall of the mounting platform 128 is provided with a sponge layer that fits the wiping roller 124 , and after the sponge is wetted, it is convenient for the wiping roller 124 to absorb the cleaning liquid.

[0103] A transfer cylinder 127 is fixedly mounted on the inner wall of the mounting cylinder 119 . The inner cavity of the transfer cylinder 127 is communicated with the inner cavity of the mounting platform 128 . The interior of the transfer cylinder 127 is used to transfer and temporarily store cleaning liquid, thereby providing cleaning liquid for the sponge inside the mounting platform 128 .

[0104] A connecting tube 126 is fixedly installed on the bottom surface of the adapter tube 127 , and the other end of the connecting tube 126 is communicated with the inner cavity of the storage tube 117 . The adapter tube 127 absorbs cleaning liquid through the connecting tube 126 . An air pressure balance port is provided at any position of the outer wall of the storage tube 117 .

[0105] A control plug 131 is elastically mounted on the inner wall of the adapter cylinder 127, an upper one-way piece 130 is elastically mounted on the upper end surface of the control plug 131, a discharge hole is opened on the outer wall of the control plug 131, and the upper one-way piece 130 is a rubber piece for one-way closing the discharge hole.

[0106] A lower one-way sheet 132 is elastically installed at the bottom of the adapter cylinder 127. A feed hole is opened at the bottom of the adapter cylinder 127. The lower one-way sheet 132 is used to unidirectionally close the feed hole. By reciprocatingly sliding the control plug 131 and cooperating with the one-way conducting feed hole and discharge hole, the cleaning liquid is controlled to flow to contact the sponge layer inside the mounting platform 128, thereby realizing the supply of cleaning liquid to the wiping sheet 121.

[0107] A control wheel 125 is rotatably mounted on the inner wall of the mounting cylinder 119, and a control ring 122 is fixedly mounted on the inner wall of the closing cylinder 114. The inner wall of the control ring 122 fits the outer wall of the control wheel 125. The closing cylinder 114 rotates, driving the control ring 122 to rotate, thereby driving the control wheel 125 to rotate (the control ring 122 and the control wheel 125 can be replaced by mutually meshing gears and gear rings);

[0108] A mounting shaft 129 is fixedly installed at the bottom of the control wheel 125. The mounting shaft 129 passes through the wiping roller 124 and is fixedly connected to the wiping roller 124. The radial outer wall rope of the mounting shaft 129 is connected to the control plug 131. During the rotation of the closing cylinder 114, the mounting shaft 129 is driven to rotate by the control wheel 125. At this time, the control plug 131 is driven to slide by the rope, and the elastic force exerted on the control plug 131 is cooperated to control the reciprocating sliding of the control plug 131, thereby realizing automatic wetting of the wiping sheet 121.

[0109] 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.

[0110] 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.

[0111] 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 construction method for a composite beam-column node using a variable-section T-shaped limb, characterized in that: The following steps are involved: A1. A stiffening rib (1a) is provided inside the steel pipe column (1), and a double T-shaped rib plate (3) is welded on the top of the bottom plate of the composite beam U-shaped steel (2); a stud connector (4) is welded on the top of the composite beam U-shaped steel top (2); a bent anchoring section is made at the end of the bottom steel bar of the prefabricated floor deck (6); and a steel bar connection plate (5) is welded at the end of the composite beam U-shaped steel (2); A2, hoisting and installing the steel pipe column (1), then setting up a temporary support (9), hoisting the composite beam U-shaped steel (2) to the temporary support (9), and then welding the steel bar connecting plate (5), the composite beam U-shaped steel top (2) and the steel pipe column (1); A3. Welding the additional steel bars (7) to the steel bar connecting plate (5) according to design requirements; A4. A floor support portion (10) is arranged at the bottom of the prefabricated floor deck (6), the prefabricated floor deck (6) is hoisted to a corresponding position, the reinforcing steel bar (8) is aligned with the PBL anti-shear hole (3c), the reinforcing steel bar (8) is pushed into the PBL anti-shear hole (3c), and then the reinforcing steel bar (8) is tied and connected with the steel bar truss and the additional steel bar (7) of the prefabricated floor deck (6); A5. Cast the node steel pipe column (1), the composite beam U-shaped steel (2) and the prefabricated floor deck (6) concrete to complete the node connection of the steel pipe column (1), the concrete column, the composite beam U-shaped steel (2) and the prefabricated floor deck (6).

2. A composite beam-column node using a variable-section T-shaped limb, which is applied to the construction method of the steel-concrete composite beam and steel tube concrete column connection node according to claim 1, characterized in that: It comprises a steel pipe column (1), a stiffening rib (1a), a composite beam U-shaped steel (2), a double T-shaped rib plate (3), a bolt connector (4), a steel bar connecting plate (5), a prefabricated floor deck (6), additional steel bars (7), reinforcing steel bars (8), a temporary support (9), a floor support portion (10) and cast-in-place concrete (11); The two ends of the stiffening rib (1a) are respectively connected to two adjacent right-angled sides of the inner wall of the steel pipe column (1); The double T-shaped rib plate (3) comprises a mid-span low rib plate (3a), a reverse bending section high rib plate (3b) and a PBL shear-resistant hole (3c); The mid-span low rib plate (3a) is fixedly installed inside the composite beam U-shaped steel (2), one end of the anti-bending section high rib plate (3b) is fixedly connected to the mid-span low rib plate (3a), and the PBL anti-shear holes (3c) are respectively opened on the outer walls of the mid-span low rib plate (3a) and the anti-bending section high rib plate (3b); The steel bar connecting plate (5) is fixedly mounted on the outer wall of the composite beam U-shaped steel (2), and the additional steel bar (7) is fixedly mounted on the outer wall of the steel bar connecting plate (5); The reinforcing steel bar (8) is arranged on the prefabricated floor deck (6), and one end thereof passes through the PBL anti-shear hole (3c); The temporary support (9) is used to support the composite beam U-shaped steel (2); The floor slab support portion (10) is used to support the prefabricated floor decking slab (6).

3. A composite beam-column node using a variable-section T-shaped limb according to claim 2, characterized in that: The height of the high rib plate (3b) in the reverse bending section is not less than 2 / 3 of the height of the U-shaped steel (2) of the composite beam, and is not greater than the height of the additional steel bars (7); the length of the high rib plate (3b) in the reverse bending section is not less than 500 mm, and is not greater than 1 / 4 of the total length of the beam; The height of the mid-span low rib plate (3a) is not greater than 1 / 3 of the height of the composite beam U-shaped steel (2), and a transition section is provided between the mid-span low rib plate (3a) and the reverse bending section high rib plate (3b), and the angle between the transition section and the horizontal plane is in the range of 30°-45°.

4. A composite beam-column node using a variable-section T-shaped limb according to claim 3, characterized in that: The high rib plate (3b) of the reverse bending section is provided with a transition wing plate near the steel bar connecting plate (5), and the width of the end of the transition wing plate is not greater than 50 mm of the steel bar connecting plate (5); The diameter of the PBL anti-shear hole (3c) is not less than 2.5 times the diameter of the reinforcing steel bar (8) and is not less than 35 mm; The width of the steel bar connecting plate (5) is 50-100 mm greater than the width of the composite beam U-shaped steel (2), and the thickness is not less than the wall thickness of the steel pipe column (1).

5. A composite beam-column node using a variable-section T-shaped limb according to claim 4, characterized in that: The floor support part (10) comprises a control part (111), a connecting tube (112) and a support plate (115); One end of the connecting tube (112) is used to be connected to the movable end of the control unit (111), and the supporting plate (115) is fixedly connected to the other end of the connecting tube (112); A mounting cylinder (119) is fixedly mounted on the outer wall of the support plate (115), a laser emitting module (120) is fixedly mounted on the inner wall of the mounting cylinder (119), a closing cylinder (114) is rotatably mounted on the radial outer wall of the mounting cylinder (119), and an avoidance hole (116) adapted to the laser emitting module (120) is provided on the outer wall of the closing cylinder (114).

6. A composite beam-column node using a variable-section T-shaped limb according to claim 5, characterized in that: The outer wall of the connecting tube (112) is provided with a limit pin (113), and the outer wall of the connecting tube (112) and the outer wall of the movable end of the control part (111) both have through holes for the limit pin (113) to be inserted into; A control plate (123) is elastically mounted on the inner wall of the connecting cylinder (112), a guide block (118) is fixedly mounted on the inner wall of the closing cylinder (114), and the guide block (118) is elastically connected to the outer wall of the mounting cylinder (119); A traction rope (133) connected to the guide block (118) is fixedly mounted on the outer wall of the control panel (123).

7. A composite beam-column node using a variable-section T-shaped limb according to claim 6, characterized in that: A wiping sheet (121) is fixedly mounted on the inner wall of the sealing cylinder (114); A wiping roller (124) is rotatably mounted on the inner wall of the mounting cylinder (119), and the radial outer wall of the wiping roller (124) is in rolling contact with the outer wall of the wiping sheet (121); A storage cylinder (117) for storing cleaning liquid is fixedly mounted on the inner wall of the mounting cylinder (119), and the cleaning liquid is provided to the wiping roller (124) through the storage cylinder (117).

8. A composite beam-column node using a variable-section T-shaped limb according to claim 7, characterized in that: A mounting platform (128) is fixedly mounted on the inner wall of the mounting cylinder (119), and a sponge layer that fits the wiping roller (124) is provided on the inner wall of the mounting platform (128); A switching cylinder (127) is fixedly mounted on the inner wall of the mounting cylinder (119), and the inner cavity of the switching cylinder (127) is communicated with the inner cavity of the mounting platform (128); A connecting tube (126) is fixedly mounted on the bottom surface of the adapter tube (127), and the other end of the connecting tube (126) is in communication with the inner cavity of the storage tube (117).

9. A composite beam-column node using a variable-section T-shaped limb according to claim 8, characterized in that: A control plug (131) is elastically mounted on the inner wall of the adapter tube (127), an upper one-way piece (130) is elastically mounted on the upper end surface of the control plug (131), and a lower one-way piece (132) is elastically mounted on the bottom of the adapter tube (127).

10. A composite beam-column node using a variable-section T-shaped limb according to claim 9, characterized in that: A control wheel (125) is rotatably mounted on the inner wall of the mounting cylinder (119), and a control ring (122) is fixedly mounted on the inner wall of the closing cylinder (114), wherein the inner wall of the control ring (122) is in contact with the outer wall of the control wheel (125); A mounting shaft (129) is fixedly mounted at the bottom of the control wheel (125); the mounting shaft (129) penetrates the wiping roller (124) and is fixedly connected to the wiping roller (124); a radial outer wall rope of the mounting shaft (129) is connected to a control plug (131).

Images