Combined beam-column joint with variable cross-section T-shaped limb and construction method thereof

Abstract

A kind of combined beam column joint with variable cross-section T-shaped limb and its construction method belong to prefabricated building technical field, technical points: including the following steps: A1, stiffener is arranged in the inside of steel pipe column, double T-shaped rib plate is welded at the top of combined beam U-shaped steel bottom plate;Bolt connector is welded at the top of combined beam U-shaped steel plate;Bending anchoring section is made at the end of bottom layer reinforcement of prefabricated floor slab;Reinforcement connecting plate is welded at the end of combined beam U-shaped steel;A2, hoist and install steel pipe column, then erect temporary support, hoist combined beam U-shaped steel to temporary support, then reinforcement connecting plate, combined beam U-shaped steel top and steel pipe column are welded;A3, additional reinforcement is welded to reinforcement connecting plate according to design requirements;Through the above structure cooperation, the overall structural strength can be effectively improved, and the construction efficiency is improved, after concrete curing is completed, temporary support is dismantled for the next construction layer, with the design concept of resource saving and sustainable development.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabricated buildings, in particular to a combined beam-column joint with variable cross-section T-shaped limbs and a construction method thereof. BACKGROUND

[0002] Prefabricated structures are the main direction of green building implementation today, and are widely used in various buildings, which can significantly improve material utilization efficiency and reduce on-site wet work. In civil buildings such as schools, hospitals and office buildings, prefabricated frame structures are most widely used, which have the advantages of flexible plane layout, good structural integrity and the like. Moreover, the application rate of concrete-filled steel tube columns gradually increases in newly built buildings in recent years due to their high bearing capacity, superior seismic performance and convenient construction and the like.

[0003] In the concrete-filled steel tube column frame structure system, the concrete-filled steel tube column, the combined beam U-shaped steel and the composite slab are commonly used, and the connecting joint part of the three is a difficult point in design and construction. The connecting joint part of the concrete-filled steel tube column, the combined beam and the composite slab is usually cast in situ, and the types of steel bars are various and the workload is large, and the positioning accuracy of the steel bars is poor, and the existing connection mainly adopts the mode of opening holes in the wall of the steel tube column and anchoring and connecting part components of the combined beam into the steel tube column, and the opening holes in the wall of the steel tube column greatly weaken the bearing capacity and ductility of the steel tube column.

[0004] Therefore, the application provides a combined beam-column joint with variable cross-section T-shaped limbs and a construction method thereof. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0006] The technical scheme adopted by the application to solve the technical problems is: the combined beam-column joint with variable cross-section T-shaped limbs and the construction method thereof, comprising the following steps:

[0007] A1, a stiffening rib is arranged on the inner side of the steel tube column, and a double-T rib plate is welded on the top of the bottom plate of the combined beam U-shaped steel; a stud connector is welded on the combined beam U-shaped part; a bent anchoring section is made at the end of the bottom layer steel bar of the prefabricated floor slab; and a steel bar connecting plate is welded on the end of the combined beam U-shaped steel;

[0008] A2, hoist and install the steel tube column, then set up temporary supports, hoist and install the combined beam U-shaped steel to the temporary supports, and then weld the steel bar connecting plate, the combined beam U-shaped steel and the steel tube column;

[0009] A3, weld the additional steel bars to the steel bar connecting plate according to the design requirements;

[0010] A4, setting a floor slab support part at the bottom of the prefabricated floor support plate, hoisting the prefabricated floor support plate to the corresponding position, aligning the reinforcing steel bars with the PBL shear holes, pushing the reinforcing steel bars into the PBL shear holes, and then binding and connecting the reinforcing steel bars with the prefabricated floor support plate steel bar truss and additional steel bars;

[0011] A5, pouring the node steel pipe column, the combined beam U-shaped steel and the prefabricated floor support plate concrete, and completing the node connection of the steel pipe column concrete column, the combined beam U-shaped steel and the prefabricated floor support plate.

[0012] A combined beam column node with a variable cross-section T-shaped limb, which is applied to the combined beam column node with a variable cross-section T-shaped limb and the construction method thereof, comprises a steel pipe column, a stiffening rib, a combined beam U-shaped steel, a double T-shaped rib plate, a bolted connector, a steel bar connecting plate, a prefabricated floor support plate, additional steel bars, reinforcing steel bars, temporary supports, a floor slab support part and cast-in-place concrete.

[0013] The two ends of the stiffening rib are respectively connected with two adjacent right-angle edges of the inner wall of the steel pipe column.

[0014] The double T-shaped rib plate comprises a mid-span low rib plate, a reverse bending section high rib plate and PBL shear holes.

[0015] The mid-span low rib plate is fixedly installed in the inside of the combined beam U-shaped steel, one end of the reverse bending section high rib plate is fixedly connected with the mid-span low rib plate, and the PBL shear holes are respectively arranged in the outer walls of the mid-span low rib plate and the reverse bending section high rib plate.

[0016] The steel bar connecting plate is fixedly installed on the outer wall of the combined beam U-shaped steel, and the additional steel bars are fixedly installed on the outer wall of the steel bar connecting plate.

[0017] The reinforcing steel bars are arranged on the prefabricated floor support plate and penetrate through the PBL shear holes at one end.

[0018] The temporary supports are used for supporting the combined beam U-shaped steel.

[0019] The floor slab support part is used for supporting the prefabricated floor support plate.

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

[0021] The height of the mid-span low rib plate is not greater than 1 / 3 of the height of the combined beam U-shaped steel, a transition section is arranged between the mid-span low rib plate and the reverse bending section high rib plate, and the angle between the transition section and the horizontal plane ranges from 30° to 45°.

[0022] Preferably, a transition wing plate is arranged at the position close to the steel bar connecting plate of the reverse bending section high rib plate, and the end width of the transition wing plate is not greater than 50 mm of the steel bar connecting plate.

[0023] The PBL shear hole diameter is not less than 2.5 times the diameter of the reinforcing steel and is not less than 35 mm;

[0024] The width of the reinforcing steel connecting plate is 50-100 mm 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 part comprises a control part, a connecting cylinder and a support plate;

[0026] One end of the connecting cylinder is used to connect with the movable end of the control part, and the support plate is fixedly connected with the other end of the connecting cylinder;

[0027] The outer wall of the support plate is fixedly installed with a mounting cylinder, the inner wall of the mounting cylinder is fixedly installed with a laser emission module, and the radial outer wall of the mounting cylinder is rotatably installed with a closed cylinder, and the outer wall of the closed cylinder is provided with an avoiding hole matched with the laser emission module.

[0028] Preferably, the outer wall of the connecting cylinder is provided with a limiting pin, and the outer wall of the connecting cylinder and the outer wall of the movable end of the control part are both provided with through holes for inserting the limiting pin;

[0029] The inner wall of the connecting cylinder is elastically installed with a control plate, the inner wall of the closed cylinder is fixedly installed with a guide block, and the guide block is elastically connected with the outer wall of the mounting cylinder;

[0030] The outer wall of the control plate is fixedly installed with a traction rope connected with the guide block.

[0031] Preferably, the inner wall of the closed cylinder is fixedly installed with a wiping piece;

[0032] The inner wall of the mounting cylinder is rotatably installed with a wiping roller, and the radial outer wall of the wiping roller is in rolling fit with the outer wall of the wiping piece;

[0033] The inner wall of the mounting cylinder is fixedly installed with a storage cylinder for storing cleaning liquid, and the wiping roller is provided with cleaning liquid through the storage cylinder.

[0034] Preferably, the inner wall of the mounting cylinder is fixedly installed with a mounting table, and the inner wall of the mounting table is provided with a sponge layer in fit with the wiping roller;

[0035] The inner wall of the mounting cylinder is fixedly installed with an adapter cylinder, and the inner cavity of the adapter cylinder and the inner cavity of the mounting table are in communication with each other;

[0036] The bottom surface of the adapter cylinder is fixedly installed with a connecting pipe, and the other end of the connecting pipe is in communication with the inner cavity of the storage cylinder.

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

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

[0039] The bottom of the control wheel is fixedly mounted with a mounting shaft, the mounting shaft penetrates the wiping roller and is fixedly connected with the wiping roller, and the radial outer wall of the mounting shaft is connected with the control plug through a rope.

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

[0041] 1、The beam-column slab joint system has excellent bearing capacity and seismic performance, a double-T-shaped rib plate is welded at the top of the U-shaped steel bottom plate of the composite beam, the double-T-shaped rib plate is a high rib plate at the bending section near the beam-column slab joint part and a low rib plate at the middle section of the beam span, the steel pipe column is welded with the U-shaped steel flange of the composite beam and the reinforced connecting plate, and local stiffening ribs are welded in the pipe wall at the connecting position of the connecting joint, these connecting modes can significantly increase the bearing capacity and seismic performance of the beam-column slab joint system, strengthen the connection performance of steel and concrete, avoid local concentrated stress and weakening of the bearing capacity caused by opening of the steel pipe column wall, meet the construction requirements, and the like.

[0042] 2、The beam-column slab joint system has high construction efficiency and construction precision, there is no complex prefabrication work on 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, the reinforced connecting plate, the composite beam and the steel pipe column are welded and connected, the welding operation amount is small, the additional longitudinal reinforcement of the composite beam is welded on the reinforced connecting plate, the longitudinal reinforcement of the composite slab passes through the PBL hole of the double-T-shaped rib plate, and fast and accurate positioning and binding are realized, the whole construction process is simple to operate, and the construction efficiency is relatively high.

[0043] 3、The beam-column slab joint system does not need to construct a formwork and consumes less materials. The U-shaped steel of the composite beam and the bottom plate of the composite slab can replace the construction formwork of the beam-column slab joint, and during the construction process, only temporary supports need to be erected on the composite beam and the composite slab bottom plate to complete the whole construction process. After the concrete curing is completed, the temporary supports are dismantled and used for the next construction layer, which has the design concept of saving resources and sustainable development.

[0044] 4、The mounting cylinder and the closing plate are arranged, the inner wall of the mounting cylinder is fixedly mounted with a laser emitting module, the laser emitting module is a common laser level meter, when supporting the prefabricated floor slab, a plurality of floor support parts need to be supported at the same time, the height of each support plate is adjusted, and the laser emitting module is used to detect the level of the bottom surface of the prefabricated floor slab, compared with the prior art which can only support the floor and needs to be adjusted by manual support, the efficiency of supporting the prefabricated floor slab can be effectively improved, and the level of the bottom surface of the prefabricated floor slab can be calibrated. BRIEF DESCRIPTION OF DRAWINGS

[0045] The present application will be further described below with reference to the drawings.

[0046] Figure 1 is the flow chart of the construction method in the present application;

[0047] Figure 2 is the schematic diagram of the steel pipe column in the present application;

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

[0049] Figure 4 is the schematic diagram of the prefabricated floor support plate in the present application;

[0050] Figure 5 is the schematic diagram of the double-T-shaped ribbed slab in the present application;

[0051] Figure 6 is the schematic diagram of the installation of the U-shaped steel reinforcement cage of the composite beam in the present application;

[0052] Figure 7 is the schematic diagram of the cooperation of the U-shaped steel of the composite beam and the double-T-shaped ribbed slab in the present application

[0053] Figure 8 is the schematic diagram of the pouring completion in the present application;

[0054] Figure 9 is the schematic diagram of the overall structure of the floor support part in the present application;

[0055] Figure 10 is the schematic diagram of the guide block in the present application;

[0056] Figure 11 is the exploded view of the closing cylinder in the present application;

[0057] Figure 12 is the sectional view of the connecting cylinder in the present application;

[0058] Figure 13 is the sectional view of the installation cylinder in the present application;

[0059] Figure 14 is the sectional view of the storage cylinder in the present application;

[0060] Figure 15 is Figure 14 the enlarged view of the structure at A in the present application.

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

[0062] 2, U-shaped steel of the composite beam;

[0063] 3, double-T-shaped ribbed slab; 3a, low ribbed slab in the midspan section; 3b, high ribbed slab in the inverted section; 3c, PBL shear hole;

[0064] 4, stud connector;

[0065] 5. Steel bar connecting plate;

[0066] 6. Precast floor support plate;

[0067] 7. Additional steel bar;

[0068] 8. Reinforcing steel bar;

[0069] 9. Temporary support;

[0070] 10. Floor support part;

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

[0072] 111. Control part; 112. Connecting cylinder; 113. Limiting pin; 114. Closing cylinder; 115. Support plate; 116. Avoidance hole; 117. Storage cylinder; 118. Guide block; 119. Installation cylinder; 120. Laser emission module; 121. Wiping piece; 122. Control ring; 123. Control plate; 124. Wiping roller; 125. Control wheel; 126. Connecting pipe; 127. Switching cylinder; 128. Installation table; 129. Installation shaft; 130. Upper one-way piece; 131. Control plug; 132. Lower one-way piece; 133. Towing rope. DETAILED DESCRIPTION

[0073] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in combination with specific embodiments.

[0074] As shown in the drawings, the construction method of the combined beam column node with variable cross-section T-shaped limb of the present application comprises the following steps: Figure 1 Preparation work:

[0075] A1, stiffening ribs 1a are arranged on the inner side of the steel pipe column 1, double T-shaped rib plates 3 are welded on the top of the bottom plate of the combined beam U-shaped steel 2, bolt connectors 4 are welded on the top of the combined beam U-shaped steel 2, bent anchoring sections are made at the end of the bottom layer steel bar of the prefabricated floor support plate 6, and steel bar connecting plates 5 are welded on the ends of the combined beam U-shaped steel 2;

[0076] On-site construction:

[0077] A2, hoist and install the steel pipe column 1, then set up the temporary support 9, hoist the combined beam U-shaped steel 2 to the temporary support 9, and then weld the steel bar connecting plate 5, the combined beam U-shaped steel 2 and the steel pipe column 1;

[0078] A3, weld the additional steel bar 7 to the steel bar connecting plate 5 according to the design requirements;

[0079]

[0080] ​A4, set the floor support part 10 at the bottom of the prefabricated floor bearing plate 6, hoist the prefabricated floor bearing plate 6 to the corresponding position, align the reinforcing steel bars 8 with the PBL shear holes 3c, push the reinforcing steel bars 8 into the PBL shear holes 3c, and then bind and connect the reinforcing steel bars 8 with the prefabricated floor bearing plate 6 steel bar truss and the additional steel bars 7;

[0081] A5, pour the node steel pipe column 1, the composite beam U-shaped steel 2 and the prefabricated floor bearing plate 6 concrete, complete the steel pipe column concrete column, the composite beam U-shaped steel 2 and the prefabricated floor bearing plate 6 node connection.

[0082] As shown in Figures 2-15 A combined beam column node with variable cross-section T-shaped limbs is applied to the combined beam column node with variable cross-section T-shaped limbs and the construction method thereof, and includes a steel pipe column 1, a stiffening rib 1a, a composite beam U-shaped steel 2, a double-T-shaped rib plate 3, a mid-span low rib plate 3a, an inverted bending section high rib plate 3b, a PBL shear hole 3c, a stud connector 4, a steel bar connecting plate 5, a prefabricated floor bearing plate 6, additional steel bars 7, reinforcing steel bars 8, temporary supports 9, floor support parts 10 and cast-in-place concrete 11.

[0083] By setting the stiffening rib 1a inside the wall of the steel pipe column 1, the double-T-shaped rib plate 3 is welded to the top of the bottom plate of the composite beam U-shaped steel 2, the cross-sectional height of the double-T-shaped rib plate 3 changes along the longitudinal direction of the beam, a plurality of PBL shear holes 3c are formed on the double-T-shaped rib plate 3, the stud connector 4 is welded to the top of the top plate of the composite beam U-shaped steel 2, the bent anchoring section is made at the end of the longitudinal reinforcement of the bottom layer of the prefabricated floor bearing plate 6, and the steel bar connecting plate 5 is welded to the end of the composite beam U-shaped steel 2; the steel pipe column 1, the composite beam U-shaped steel 2 and the steel bar connecting plate 5 are fixed in position by welding, the additional steel bars 7 of the composite beam U-shaped steel on site are fixed in position with the steel bar connecting plate 5 by welding, the additional reinforcing steel bars 8 of the laminated board on site pass through the PBL shear holes 3c and are bound and connected with the additional steel bars 7 of the composite beam on site and the reinforcing steel bars 8 of the prefabricated floor bearing plate 6.

[0084] The double-T-shaped rib plate 3 is an inverted bending section high rib plate 3b near the beam-column slab node, the height of which is not less than 2 / 3 of the height of the composite beam U-shaped steel 2 and not more than the height at which the additional steel bars 7 of the composite beam U-shaped steel on site are installed, the length of which is not less than 500 mm and not more than 1 / 4 of the total length of the beam, and the double-T-shaped rib plate 3 is a mid-span low rib plate 3a on one side of the beam span, the height of which is not more than 1 / 3 of the height of the composite beam U-shaped steel, and a transition section is arranged between the inverted bending section high rib plate 3b and the mid-span low rib plate 3a, the angle between the transition section and the horizontal plane being in the range of 30-45 degrees. This arrangement ensures that there are tensile parts in the double-T-shaped rib plate 3 in the positive and negative bending moment sections, thereby avoiding excessive tensile stress of the concrete and cracking of the concrete.

[0085] The transition wing plate is arranged at the position close to the steel connecting plate 5, and the end width of the transition wing plate is not greater than 50mm of the steel connecting plate 5. The arrangement makes the end of the double-T-shaped rib plate 3 have sufficient welding length with the steel connecting plate 5, and ensures the connection quality.

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

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

[0088] The prefabricated composite slab 6 is only a steel truss floor slab selected for convenient explanation and drawing, and the application is applicable to any form of prefabricated composite slab.

[0089] As a preferred embodiment of the application, the floor slab supporting part 10 comprises a control part 111, a connecting cylinder 112 and a supporting plate 115.

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

[0091] When supporting the prefabricated floor slab 6, the supporting plate 115 is installed at the movable end of the control part 111, and the hydraulic cylinder is controlled to be elongated until the supporting plate 115 is attached to the bottom of the prefabricated floor slab 6, so that the support of the prefabricated floor slab 6 is realized. When the reinforcing steel bar 8 is inserted into the PBL shear hole 3c, the height of the reinforcing steel bar 8 is adjusted through the movable end of the control part 111, so as to facilitate the alignment of the reinforcing steel bar 8 and the PBL shear hole 3c, and improve the engineering construction efficiency.

[0092] The outer wall of the supporting plate 115 is fixedly installed with a mounting cylinder 119, and the mounting cylinder 119 is sleeved on the outer wall of the supporting plate 115. When the prefabricated floor slab 6 is supported, the axial end of the mounting cylinder 119 is not stressed.

[0093] The inner wall of the mounting cylinder 119 is fixedly installed with a laser emitting module 120, which is a common laser level. When supporting the prefabricated floor slab 6, the plurality of floor slab supporting parts 10 are simultaneously supported, the height of each supporting plate 115 is adjusted, and the laser emitting module 120 is used to detect the level of the bottom surface of the prefabricated floor slab 6. Compared with the patent CN220621208U, the housing building support device can only support the floor slab, and needs to be adjusted by manual support. The efficiency of supporting the prefabricated floor slab 6 can be effectively improved, and the level of the bottom surface of the prefabricated floor slab 6 can be calibrated.

[0094] The radial outer wall of the mounting cylinder 119 is rotatably installed with a closing cylinder 114. The outer wall of the closing cylinder 114 is provided with a avoiding hole 116 matched with 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 to be used, the closing cylinder 114 is rotated until the avoiding hole 116 moves to the laser emitting end of the laser emitting module 120, so that the laser can be emitted.

[0095] The outer wall of the connecting cylinder 112 is provided with a limiting pin 113. The outer wall of the connecting cylinder 112 and the outer wall of the movable end of the control part 111 are both provided with through holes for inserting the limiting pin 113. After the connecting cylinder 112 and the movable end of the control part 111 are inserted, the limiting pin 113 penetrates the connecting cylinder 112 to realize the connection between the connecting cylinder 112 and the movable end of the control part 111.

[0096] The inner wall of the connecting cylinder 112 is elastically installed with a control plate 123. The control plate 123 is connected with the connecting cylinder 112 through a spring. During the process of inserting the connecting cylinder 112 and the movable end of the control part 111, the movable end of the control part 111 pushes the control plate 123.

[0097] The inner wall of the closing cylinder 114 is fixedly installed with a guide block 118. The guide block 118 is elastically connected with the outer wall of the mounting cylinder 119. The guide block 118 is connected with the mounting cylinder 119 through a spring.

[0098] The outer wall of the control plate 123 is fixedly installed with a traction rope 133 connected with the guide block 118. The traction rope 133 is in a tension state in the initial state. When the movable end of the control part 111 is inserted into the connecting cylinder 112, the control plate 123 slides. At this time, the guide block 118 is driven to rotate the closing cylinder 114 by the elastic force until the avoiding hole 116 moves to the laser emitting end of the laser emitting module 120, so that the laser can be emitted. Thus, the automatic exposure of the laser emitting end of the laser emitting module 120 is realized when the movable end of the control part 111 is inserted into the connecting cylinder 112.

[0099] As a preferred embodiment of the present application, the inner wall of the closing cylinder 114 is fixedly provided with a wiping piece 121, and when the closing cylinder 114 rotates, the laser emitting end of the laser emitting module 120 is wiped by the wiping piece 121, so that the laser emitting end of the laser emitting module 120 is cleaned.

[0100] The inner wall of the mounting cylinder 119 is rotatably provided with a wiping roller 124, the radial outer wall of the wiping roller 124 is in rolling contact with the outer wall of the wiping piece 121, and after the wiping roller 124 is wetted, the wiping piece 121 is wetted, so that the cleaning efficiency of the laser emitting end of the laser emitting module 120 is improved.

[0101] The inner wall of the mounting cylinder 119 is fixedly provided with a storage cylinder 117 for storing cleaning liquid, and the wiping roller 124 is provided with cleaning liquid through the storage cylinder 117.

[0102] The inner wall of the mounting cylinder 119 is fixedly provided with a mounting table 128, and the inner wall of the mounting table 128 is provided with a sponge layer in contact with the wiping roller 124, and the sponge is wetted so as to facilitate the wiping roller 124 to absorb the cleaning liquid.

[0103] The inner wall of the mounting cylinder 119 is fixedly provided with an adapter cylinder 127, and the inner cavity of the adapter cylinder 127 and the inner cavity of the mounting table 128 are in communication with each other, and the adapter cylinder 127 is used for temporarily storing cleaning liquid, so as to provide the sponge in the mounting table 128 with cleaning liquid.

[0104] The bottom surface of the adapter cylinder 127 is fixedly provided with a connecting pipe 126, and the other end of the connecting pipe 126 is in communication with the inner cavity of the storage cylinder 117, and the adapter cylinder 127 sucks the cleaning liquid through the connecting pipe 126, and the outer wall of the storage cylinder 117 is provided with an air pressure balance port at any position.

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

[0106] The bottom of the adapter cylinder 127 is elastically provided with a lower one-way piece 132, and the bottom of the adapter cylinder 127 is provided with an inlet hole, and the lower one-way piece 132 is used for one-way closing the inlet hole, and the cleaning liquid is controlled to flow to the sponge layer in the mounting table 128 through the cooperation of the reciprocating sliding control plug 131 and the one-way communication inlet hole and discharge hole, so as to realize the supply of cleaning liquid to the wiping piece 121.

[0107] The inner wall of the mounting cylinder 119 is rotatably mounted with a control wheel 125, the inner wall of the closing cylinder 114 is fixedly mounted with a control ring 122, the inner wall of the control ring 122 is in contact with the outer wall of the control wheel 125, the closing cylinder 114 is rotated to drive 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 intermeshing gears and toothed rings);

[0108] The bottom of the control wheel 125 is fixedly mounted with a mounting shaft 129, the mounting shaft 129 penetrates the wiping roller 124 and is fixedly connected with the wiping roller 124, the radial outer wall of the mounting shaft 129 is connected with a control plug 131, the mounting shaft 129 is driven to rotate by the control wheel 125 in the process of rotating the closing cylinder 114, at this time, the control plug 131 is driven to slide by a rope, and the control plug 131 is reciprocally slid by cooperating with the elastic force received by the control plug 131, so that the automatic wetting of the wiping sheet 121 is realized.

[0109] The above front, rear, left, right, top and bottom are based on the drawings in the specification Figure 1 , and are defined as front, left, right, top and bottom according to the standard of human observation angle, and the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and the like.

[0110] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the scope of protection of the present application.

[0111] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of constructing a composite beam-column joint with a variable cross-section T-leg, characterized by: The method comprises the following steps: A1, a stiffening rib (1a) is arranged inside a steel pipe column (1), a double T-shaped rib plate (3) is welded on the top of the bottom plate of a composite beam U-shaped steel (2), PBL shear holes (3c) are opened at the web positions of the double T-shaped rib plate (3), a stud connector (4) is welded on the top of the composite beam U-shaped steel (2), a bent anchoring section is made at the end of the bottom layer steel bar of a prefabricated floor support plate (6), and a steel bar connecting plate (5) is welded on the end of the composite beam U-shaped steel (2); A2, the steel pipe column (1) is hoisted and installed, then a temporary support (9) is erected, the composite beam U-shaped steel (2) is hoisted to the temporary support (9), and then the steel bar connecting plate (5), the composite beam U-shaped steel (2) and the steel pipe column (1) are welded; A3, the additional steel bars (7) are welded to the steel bar connecting plate (5) according to the design requirements; A4, a floor support part (10) is arranged at the bottom of the prefabricated floor support plate (6), the prefabricated floor support plate (6) is hoisted to the corresponding position, the reinforcing steel bars (8) are aligned with the PBL shear holes (3c), the reinforcing steel bars (8) are pushed into the PBL shear holes (3c), and then the reinforcing steel bars (8) are bound and connected with the steel bar truss of the prefabricated floor support plate (6) and the additional steel bars (7); A5, the node steel pipe column (1), the composite beam U-shaped steel (2) and the prefabricated floor support plate (6) are poured with concrete, and the node connection of the steel pipe column concrete column, the composite beam U-shaped steel (2) and the prefabricated floor support plate (6) is completed.

2. A composite beam-column joint with a variable cross-section T-shaped leg, which is applied to the composite beam-column joint with a variable cross-section T-shaped leg and the construction method thereof according to claim 1, characterized in that: The method 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 stud connector (4), a steel bar connecting plate (5), a prefabricated floor support plate (6), additional steel bars (7), reinforcing steel bars (8), a temporary support (9), a floor support part (10) and cast-in-place concrete (11); The two ends of the stiffening rib (1a) are respectively connected with two adjacent right-angle edges 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 high rib plate (3b) and PBL shear holes (3c); The mid-span low rib plate (3a) is fixedly installed inside the composite beam U-shaped steel (2), one end of the reverse bending high rib plate (3b) is fixedly connected with the mid-span low rib plate (3a), and the PBL shear holes (3c) are respectively opened in the outer walls of the mid-span low rib plate (3a) and the reverse bending high rib plate (3b); The steel bar connecting plate (5) is fixedly installed on the outer wall of the composite beam U-shaped steel (2), and the additional steel bars (7) are fixedly installed on the outer wall of the steel bar connecting plate (5); The reinforcing steel bars (8) are arranged on the prefabricated floor support plate (6) and pass through the PBL shear holes (3c) at one end; The temporary support (9) is used for supporting the composite beam U-shaped steel (2); The floor support part (10) is used for supporting the prefabricated floor support plate (6).

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

4. A composite beam-column joint with variable cross-section T-legs according to claim 3, characterized in that: The transition wing plate is arranged at the position close to the steel bar connecting plate (5) of the high-rib plate (3b) in 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 connecting plate (5); The hole diameter of the PBL anti-shear hole (3c) is not less than 2.5 times the diameter of the reinforcing steel bar (8) and not less than 35 mm; The width of the steel bar connecting plate (5) is greater than the width of the U-shaped steel (2) of the composite beam by 50-100 mm, and the thickness is not less than the wall thickness of the steel pipe column (1).

5. A composite beam-column joint with variable cross-section T-legs according to claim 4, characterized in that: The floor support part (10) comprises a control part (111), a connecting cylinder (112) and a support plate (115); One end of the connecting cylinder (112) is connected with the movable end of the control part (111), and the support plate (115) is fixedly connected with the other end of the connecting cylinder (112); The outer wall of the support plate (115) is fixedly installed with a mounting cylinder (119), the inner wall of the mounting cylinder (119) is fixedly installed with a laser emitting module (120), the radially outer wall of the mounting cylinder (119) is rotatably installed with a closed cylinder (114), and the outer wall of the closed cylinder (114) is provided with an avoiding hole (116) matched with the laser emitting module (120).

6. A composite beam-column joint with variable cross-section T-legs according to claim 5, characterized in that: The outer wall of the connecting cylinder (112) is provided with a limiting pin (113), and the outer wall of the connecting cylinder (112) and the outer wall of the movable end of the control part (111) are both provided with through holes for inserting the limiting pin (113); The inner wall of the connecting cylinder (112) is elastically installed with a control plate (123), the inner wall of the closed cylinder (114) is fixedly installed with a guide block (118), and the guide block (118) is elastically connected with the outer wall of the mounting cylinder (119); The outer wall of the control plate (123) is fixedly installed with a traction rope (133) connected with the guide block (118).

7. A composite beam-column joint with variable cross-section T-legs according to claim 6, characterized in that: The inner wall of the closed cylinder (114) is fixedly installed with a wiping piece (121); The inner wall of the mounting cylinder (119) is rotatably installed with a wiping roller (124), and the radially outer wall of the wiping roller (124) is in rolling contact with the outer wall of the wiping piece (121); The inner wall of the mounting cylinder (119) is fixedly installed with a storage cylinder (117) for storing cleaning liquid, and the wiping roller (124) is provided with cleaning liquid through the storage cylinder (117).

8. A composite beam-column joint with variable cross-section T-legs according to claim 7, characterized in that: The inner wall of the mounting cylinder (119) is fixedly installed with a mounting table (128), and the inner wall of the mounting table (128) is provided with a sponge layer in contact with the wiping roller (124); The inner wall of the mounting cylinder (119) is fixedly installed with a switching cylinder (127), and the inner cavity of the switching cylinder (127) is in communication with the inner cavity of the mounting table (128); The bottom surface of the switching cylinder (127) is fixedly installed with a connecting pipe (126), and the other end of the connecting pipe (126) is in communication with the inner cavity of the storage cylinder (117).

9. A composite beam-column joint with variable cross-section T-legs according to claim 8, characterized in that: The inner wall of the adapter cylinder (127) is elastically mounted with a control plug (131), the upper end surface of the control plug (131) is elastically mounted with an upper one-way sheet (130), and the bottom of the adapter cylinder (127) is elastically mounted with a lower one-way sheet (132).

10. A composite beam-column joint with variable cross-section T-legs according to claim 9, characterized in that: The inner wall of the mounting cylinder (119) is rotatably mounted with a control wheel (125), the inner wall of the closing cylinder (114) is fixedly mounted with a control ring (122), and the inner wall of the control ring (122) is attached to the outer wall of the control wheel (125); The bottom of the control wheel (125) is fixedly mounted with a mounting shaft (129), the mounting shaft (129) penetrates the wiping roller (124) and is fixedly connected with the wiping roller (124), and the radial outer wall of the mounting shaft (129) is connected with the control plug (131).

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