U-shaped steel concrete composite beam-concrete filled steel tubular column lap joint type joint
By using lap node design of shear joints, shear studs and shear bolts at the connection of U-shaped steel concrete composite beams and steel pipe concrete columns, the problems of high welding difficulties, large workload and difficult to guarantee quality are solved, the bearing capacity and ductility of the nodes are improved, and the construction process is simplified.
Patent Information
- Application Number
- CN202411892230.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-03-04
AI Technical Summary
When the prior art connects U-shaped steel concrete composite beams and steel pipe concrete columns, there are problems such as high welding difficulty, large welding workload, difficulty in ensuring the quality of the weld, and welding in cold bend area will lead to adverse effects, resulting in reduced node bearing capacity and ductility.
A U-shaped steel concrete composite beam-steel pipe concrete column overlapping node is adopted. By setting shear joints at the bottom of the U-shaped steel beam and setting shear nails on the lower flange of the H-shaped steel beam, direct welding is avoided, internal force is transmitted using shear bolts, and nodes are formed by pouring concrete.
It reduces the workload and difficulty of on-site welding, improves welding quality and efficiency, avoids the adverse effects of welding in cold bend area, enhances the bearing capacity and ductility of the nodes, and reduces construction costs and time.
Smart Images
Figure CN119553775A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of building structures, and in particular to a U-shaped steel-concrete composite beam-steel tube concrete column lap joint. Background Art
[0002] As a new type of composite structure, U-shaped steel-concrete composite beams have attracted widespread attention because they can give full play to the mechanical advantages of steel and concrete. Steel has high tensile strength, while concrete performs well in compression. The combination of the two not only improves the bearing capacity and stiffness of the component, but also gives it good ductility. In order to reduce costs and improve production efficiency, U-shaped steel is usually produced in standardized batches using thin steel plates through cold-bending forming processes.
[0003] However, in practical applications, when U-shaped steel-concrete composite beams are connected to steel tube concrete columns, some technical difficulties are encountered, especially the connection method of the node area. Traditional node connection methods mainly include inner partitions, through partitions or outer ring plates. Most of these methods rely on on-site welding operations to complete. In actual construction, there are the following problems: (1) High welding difficulty: Since the U-shaped steel is a semi-closed section, this means that welding operations need to be performed from different angles during the installation process, including overhead welding, vertical welding and flat welding, etc., but these welding postures increase the complexity and difficulty of construction, especially when operating in a limited space, which requires extremely high skills of workers; (2) Large welding workload: Traditional connection methods require a lot of welding work, which not only prolongs the construction time and increases labor costs, but also too many welds may introduce more defects and affect the quality of the overall structure; (3) Weld quality is difficult to guarantee: The on-site welding environment is unstable and is easily affected by weather conditions, workers' technical level, etc. The influence of various factors leads to uneven quality of welds, especially for welds in overhead welding positions, which become more difficult to inspect and repair, posing a great safety hazard; (4) Welding problems in the cold bending area: U-shaped steel after cold bending has stress concentration in its bending part. If welding is performed in this area, the hardening effect of the material will be further aggravated, making the weld brittle and reducing its toughness and durability. In this case, cracks or other forms of damage may occur even under normal conditions of use, thereby weakening the bearing capacity of the node; (5) Reduced bearing capacity and ductility of the node: The combined effect of all the above factors may eventually lead to a decrease in the bearing capacity and ductility of the node, which poses a threat to the safety and reliability of the entire structure; especially under the action of earthquakes, the node may be damaged prematurely and unable to effectively transfer loads, thus endangering the safety of the building. Summary of the invention
[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a U-shaped steel-concrete composite beam-steel tube concrete column lap joint to solve the problems of high welding difficulty, large welding workload, difficulty in ensuring weld quality, adverse effects caused by welding in the cold bending zone, and ultimately reduced node bearing capacity and ductility in the prior art during actual construction.
[0005] In order to solve the above technical problems, this application adopts the following technical solutions: A U-shaped steel-concrete composite beam-steel tube concrete column lap joint, comprising a vertically arranged steel tube column and U-shaped steel beams circumferentially spaced around the steel tube column; an H-shaped steel beam is arranged inside the U-shaped steel beam, the length direction of the H-shaped steel beam is consistent with the length direction of the U-shaped steel beam, one end of the H-shaped steel beam is fixedly connected to the outer side wall of the steel tube column, and the other end thereof extends into the U-shaped steel beam, so that the two side edges of the top of the H-shaped steel beam along the length direction are located above the two side edges of the top of the U-shaped steel beam along the length direction and are fixedly connected to the U-shaped steel beam; at the bottom of the U-shaped steel beam The inner wall surface is also provided with a plurality of shear connectors, which are located on both sides of the width direction of the U-shaped steel beam, and whose length direction is consistent with that of the U-shaped steel beam, and the bottom of the shear connector is fixedly connected to the U-shaped steel beam; a plurality of shear bolts are also provided in the U-shaped steel beam, and the length direction of the shear bolts is perpendicular to the length direction of the U-shaped steel beam, and after the shear bolts penetrate the web of the H-shaped steel beam, the two ends of the shear bolts respectively pass through the opposite side walls of the U-shaped steel beam and are fixedly connected to the U-shaped steel beam; concrete is poured into the steel pipe column and the inside of the U-shaped steel beam to form the node.
[0006] Preferably, the shear-resistant connector is provided with a plurality of openings, which penetrate through two opposite side walls of the shear-resistant connector and are spaced apart along the length direction of the shear-resistant connector.
[0007] Preferably, the two side edges of the U-shaped steel beam along its length direction are bent inward and then continue to extend to form an upper flange I, and there is a gap between the two upper flanges I of the U-shaped steel beam; the H-shaped steel beam has an upper flange II, a web and a lower flange, the upper flange II and the lower flange are both arranged in the horizontal direction, and the opposite sides of the web are fixedly connected to the upper flange II and the lower flange respectively; the upper flange II of the H-shaped steel beam is located above the two upper flanges I of the U-shaped steel beam, and the upper flange II can cover the gap between the two upper flanges I; the opposite side edges of the upper flange II along its width direction are fixedly connected to the upper flange I of the U-shaped steel beam respectively.
[0008] Preferably, the upper flange I of the U-shaped steel beam is fixedly connected to the outer side wall of the steel pipe column.
[0009] Preferably, the lower flange of the H-shaped steel beam is located inside the U-shaped steel beam and has a spacing with the bottom of the U-shaped steel beam.
[0010] Preferably, a plurality of shear bolts are provided on the lower flange of the H-shaped steel beam, and the shear bolts are spaced apart along the length direction of the lower flange of the H-shaped steel beam. One end of the shear bolt is fixedly connected to the lower flange of the H-shaped steel beam, and the other end thereof has a certain distance from the bottom of the U-shaped steel beam.
[0011] Preferably, a plurality of upper inner partitions and lower inner partitions are provided in the steel pipe column, wherein the upper inner partition is fixedly connected to the inner wall of the steel pipe column, and its upper surface is flush with the upper flange II of the H-shaped steel beam; the lower inner partition is fixedly connected to the inner wall of the steel pipe column, and its lower surface is flush with the lower flange of the H-shaped steel beam.
[0012] Preferably, through holes are provided on both the upper inner partition plate and the lower inner partition plate, and the through holes penetrate the opposite side walls of the upper inner partition plate and the lower inner partition plate.
[0013] The present application also provides a construction method for a U-shaped steel-concrete composite beam-steel tube concrete column overlap joint, and the construction method steps of the above-mentioned node are as follows: (1) Processing of each component in the factory: welding shear studs on the lower flange of the H-shaped steel beam, and then welding and fixing one end of the H-shaped steel beam to the steel pipe column; at the same time, welding a shear connector at the bottom of the U-shaped steel beam; (2) After the above components are transported to the construction site, the steel pipe column is installed and positioned, and the concrete is poured to a certain strength, the U-shaped steel beam is gradually lifted from the bottom to the top, so that the H-shaped steel lower flange beam on the steel pipe column passes through the gap between the upper flange (7) of the U-shaped steel beam, and the upper flange of the U-shaped steel beam is slowly lifted to the bottom of the upper flange of the H-shaped steel beam, and the U-shaped steel beam and the H-shaped steel beam are fixed by shear bolts; then, the U-shaped steel beam is welded to fix the upper flange I of the U-shaped steel beam to the upper flange II of the H-shaped steel beam; (3) Pour concrete inside the U-shaped steel and vibrate it to make it dense until the concrete reaches a certain strength.
[0014] Compared with the prior art, this application has the following beneficial effects: 1. The present application sets a plurality of shear connectors at the bottom of the U-shaped steel beam, which can effectively transfer the internal force borne by the lower flange of the U-shaped steel beam to the internal concrete, and then the concrete transfers this part of the internal force to the lower flange of the H-shaped steel beam welded with shear bolts. This overlapping force transmission method avoids the need to directly weld the lower flange of the U-shaped steel beam, thereby reducing the workload of on-site welding and eliminating the operational difficulty caused by overhead welding; at the same time, the present application uses shear bolts to fix the H-shaped steel beam and the U-shaped steel beam, ensuring that the internal force of the web of the U-shaped steel beam can be transmitted to the web of the H-shaped steel beam through the shear bolts; this not only replaces the traditional web welding, but the shear bolts also play a role in installation and positioning, ensuring the precise docking between the two.
[0015] 2. The present application makes improvements on the node structure and clarifies the internal force transmission mechanism. During on-site construction, it is only necessary to weld the upper flange of the U-shaped steel beam and the upper flange of the H-shaped steel beam to complete the fixed connection. Compared with traditional welding methods, this approach greatly reduces the difficulty of welding. Since forward welding is relatively easy to operate and is not easily affected by environmental factors, it also reduces the time and labor costs required for welding. At the same time, rapid positioning is achieved through shear bolts, and only simple forward welding operations are required. The entire installation process becomes more efficient and quick, which improves the convenience of construction, which is of great significance for accelerating project progress and shortening construction period.
[0016] 3. The node described in the present application can avoid welding of the cold-bending area. In the traditional method, welding in the cold-bending area of the U-shaped steel will cause the material to harden, making the weld fragile, and further affecting the bearing capacity and ductility of the node; however, the present application completely avoids this problem through a reasonable force transmission path design, ensuring the stability and reliability of the node in long-term use; at the same time, the present application also enhances the overall performance of the node, and the upper flange of the H-shaped steel beam covers and is fixed above the gap between the two upper flanges I of the U-shaped steel beam, forming a closed overall structure; the upper and lower flanges of the H-shaped steel beam are flush with the upper inner partition and the lower inner partition in the steel pipe column, respectively, further enhancing the overall stiffness and bending resistance of the node.
[0017] 4. The nodes described in the present application reduce unnecessary welding parts, and the corresponding amount of welding materials is also reduced, which further simplifies the construction process of the nodes described in the present application, helping to reduce labor costs and other indirect costs; each component used in the node can be produced in a standardized batch production mode, which can achieve higher production efficiency and more consistent product quality, and is conducive to promoting the industrialization process of the construction industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a structural schematic diagram of a U-shaped steel-concrete composite beam-steel tube concrete column lap joint in this application.
[0019] Figure 2 This is a schematic diagram of the structure after the H-shaped steel beam is connected to the steel pipe column.
[0020] Figure 3 It is a structural schematic diagram of a U-shaped steel beam.
[0021] Figure 4 It is a schematic diagram of the structure after the upper inner partition is connected with the steel pipe column, H-shaped steel beam and U-shaped steel beam.
[0022] In the figure: steel pipe column 1, U-shaped steel beam 2, shear connector 4, shear bolt 5, opening 6, upper flange I 7, upper flange II 8, web 9, lower flange 10, shear stud 11, upper inner partition 12, lower inner partition 13, through hole 14. DETAILED DESCRIPTION
[0023] This application will combine the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of this application.
[0024] The present application provides a U-shaped steel-concrete composite beam-steel tube concrete column lap joint, such as Figures 1 to 4 As shown, it includes a vertically arranged steel pipe column 1 and a U-shaped steel beam 2 distributed at intervals around the steel pipe column; an H-shaped steel beam is arranged in the U-shaped steel beam, the length direction of the H-shaped steel beam is consistent with the length direction of the U-shaped steel beam, one end of the H-shaped steel beam is fixedly connected to the outer wall of the steel pipe column, and the other end thereof extends into the U-shaped steel beam, so that the two side edges of the top of the H-shaped steel beam along its length direction are located above the two side edges of the top of the U-shaped steel beam along its length direction and are fixedly connected thereto; a plurality of shear connectors 4 are also arranged on the inner side wall surface of the bottom of the U-shaped steel beam, the shear connectors are located on both sides of the width direction of the U-shaped steel beam, the length direction of the shear connectors is consistent with the U-shaped steel beam, and the bottom of the shear connectors is fixedly connected to the U-shaped steel beam; a plurality of shear bolts 5 are also arranged in the U-shaped steel beam, the length direction of the shear bolts is perpendicular to the length direction of the U-shaped steel beam, and after the shear bolts penetrate the web of the H-shaped steel beam, the two ends of the shear bolts respectively pass through the opposite two side walls of the U-shaped steel beam and are fixedly connected to the U-shaped steel beam.
[0025] After studying the prior art, the present application improves the node structure in order to solve the technical problem. The primary consideration is to clarify the force transmission process. Therefore, the shear connector provided on the inner wall surface of the bottom of the U-shaped steel beam can transmit the internal force borne by the lower flange of the U-shaped steel beam to the internal concrete, and then the concrete transmits it to the lower flange of the H-shaped steel beam. This overlapping force transmission design avoids the need to weld the lower flange of the U-shaped steel beam, thereby eliminating the overhead welding, which is a complex and difficult to ensure quality operation. In contrast, the traditional method requires welding the lower flange of the U-shaped steel beam, which not only increases the construction difficulty, but also easily leads to welding quality problems. After the installation and positioning is completed, only the upper flange of the U-shaped steel beam and the upper flange of the H-shaped steel beam need to be welded downward on site. Since downward welding is relatively easy to operate and is not easily affected by environmental factors, it can greatly improve the welding quality and efficiency. In the traditional method, in order to achieve the effective connection between the U-shaped steel beam and the steel pipe column, multiple welding methods such as overhead welding, vertical welding and flat welding are often required, which puts higher requirements on the technical level of the workers and also increases the construction time and cost. The present application also provides shear bolts, which penetrate the web of the H-shaped steel beam and are fixedly connected to the two side walls of the U-shaped steel beam, ensuring that the internal force of the web of the U-shaped steel beam can be transmitted to the web of the H-shaped steel beam through the shear bolts. In the prior art, in order to ensure the connection strength of the web, a large amount of welding work is usually required, which is not only time-consuming and labor-intensive, but also increases the construction cost. The method of the present application replaces the traditional web welding and simplifies the on-site construction process. In addition, the shear bolts also play a role in installation positioning, making the docking between the U-shaped steel beam and the H-shaped steel beam more precise, reducing the risk of rework due to position deviation.
[0026] In some embodiments of the present application, the shear connector is provided with a plurality of openings 6, which penetrate the opposite side walls of the shear connector and are spaced apart along the length direction of the shear connector. After pouring concrete in the U-shaped steel beam, due to the presence of the openings on the shear connector, the concrete can form a PBL connection with the shear connector, so that the internal force borne by the lower flange of the U-shaped steel beam can be more clearly transmitted to the internal concrete through the shear connector, and then transmitted from the concrete to the lower flange of the H-shaped steel beam through the shear studs.
[0027] In some embodiments of the present application, the two side edges of the U-shaped steel beam along its length direction are bent inward and then continue to extend to form an upper flange I 7, and there is a gap between the two upper flanges I of the U-shaped steel beam; the H-shaped steel beam has an upper flange II 8, a web 9 and a lower flange 10, wherein the relationship between the width of the lower flange of the H-shaped steel, the width of the upper flange II and the width of the gap between the upper flanges of the U-shaped steel is: the width of the lower flange of the H-shaped steel < the width of the gap between the upper flange of the U-shaped steel < the width of the upper flange of the H-shaped steel, which is to ensure that the H-shaped steel beam can be inserted into the U-shaped steel beam, thereby ensuring smooth installation on site. At the same time, the relationship between the thickness of the lower flange of the H-shaped steel, the thickness of the upper flange II and the thickness of the upper flange of the U-shaped steel is: the thickness of the lower flange of the H-shaped steel> the thickness of the upper flange of the H-shaped steel> the thickness of the upper wing of the U-shaped steel, which is to achieve a strong connection, that is, to ensure that the tensile bearing capacity of the lower wing of the H-shaped steel is greater than the tensile bearing capacity of the lower flange of the U-shaped steel, and the tensile bearing capacity of the upper wing of the H-shaped steel is greater than the tensile bearing capacity of the upper flange of the U-shaped steel. The upper flange II and the lower flange are both arranged in the horizontal direction, and the opposite sides of the web are fixedly connected to the upper flange II and the lower flange respectively; the upper flange II of the H-shaped steel beam is located above the two upper flanges I of the U-shaped steel beam, and the upper flange II can cover the gap between the two upper flanges I; the opposite side edges of the upper flange II along its width direction are fixedly connected to the upper flange I of the U-shaped steel beam respectively. The upper flange I of the U-shaped steel beam is fixedly connected to the outer wall of the steel pipe column. The lower flange of the H-shaped steel beam is located inside the U-shaped steel beam, and there is a distance between the lower flange of the H-shaped steel beam and the bottom of the U-shaped steel beam. The distance is to ensure that there is enough concrete between the H-shaped steel beam and the U-shaped steel beam for lap joint force transmission. A plurality of shear studs 11 are arranged on the lower flange of the H-shaped steel beam. The shear studs are spaced along the length direction of the lower flange of the H-shaped steel beam. One end of the shear stud is fixedly connected to the lower flange of the H-shaped steel beam, and the other end thereof is spaced a certain distance from the bottom of the U-shaped steel beam. The shear studs are anchored in the concrete between the H-shaped steel beam and the U-shaped steel, which can further enhance the lap joint force transmission effect between the U-shaped steel and the H-shaped steel. A plurality of upper inner partitions 12 and lower inner partitions 13 are arranged in the steel pipe column. The upper inner partition is fixedly connected to the inner wall of the steel pipe column, and its upper surface is flush with the upper flange II of the H-shaped steel beam; the lower inner partition is fixedly connected to the inner wall of the steel pipe column, and its lower surface is flush with the lower flange of the H-shaped steel beam. The upper and lower inner partitions ensure the continuity of the force transmission of the beams around the column, and enhance the bearing capacity and integrity of the node. Through holes 14 are provided on both the upper inner partition and the lower inner partition, and the through holes penetrate the opposite side walls of the upper inner partition and the lower inner partition. The through holes can ensure the continuous pouring of concrete inside the column, so that the integrity of the steel pipe concrete column is better. The present application forms a closed integral structure by covering and fixing the upper flange of the H-shaped steel beam above the gap between the two upper flanges I of the U-shaped steel beam. The upper and lower flanges of the H-shaped steel beam are flush with the upper inner partition and the lower inner partition in the steel pipe column, respectively, further enhancing the overall stiffness and bending resistance of the node.
[0028] The specific construction process is as follows: First, in the factory, shear studs are welded on the lower flange of the H-shaped steel beam, and then one end of the H-shaped steel beam is welded and fixed to the steel pipe column; at the same time, a shear connector is welded on the lower flange of the U-shaped steel beam; then, the above components are transported to the construction site, and after the steel pipe column is installed and positioned and poured with concrete to a certain strength, the U-shaped steel beam is gradually lifted from bottom to top, so that the H-shaped steel lower flange beam on the steel pipe column passes through the gap between the upper flanges (7) of the U-shaped steel beam, and the upper flanges of the U-shaped steel beam are fixed to the upper flanges (7) of the U-shaped steel beam. After the flange is slowly lifted to the bottom of the upper flange of the H-shaped steel beam, the U-shaped steel beam and the H-shaped steel beam are fixed by shear bolts; then, the U-shaped steel beam is welded and the upper flange I of the U-shaped steel beam is welded and fixed with the upper flange II of the H-shaped steel beam. It is only necessary to weld the upper flange of the U-shaped steel to the H-shaped steel beam, and there is no need to weld the U-shaped steel to the steel pipe column; finally, concrete is poured inside the U-shaped steel and vibrated to make it dense. When the concrete reaches a certain strength, the beam-column node can be overlapped and force transmitted. During the entire on-site construction process, only the above welding operations need to be performed, and the welding workload is greatly reduced.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent substitutions of the technical solution of the present application that do not depart from the purpose and scope of the technical solution of the present application should be included in the scope of the claims of the present application.
Claims
1. A U-shaped steel-concrete composite beam-steel tube concrete column lap joint, characterized in that: It comprises a vertically arranged steel pipe column (1), and U-shaped steel beams (2) circumferentially spaced and distributed around the steel pipe column; an H-shaped steel beam is arranged inside the U-shaped steel beam, the length direction of the H-shaped steel beam is consistent with the length direction of the U-shaped steel beam, one end of the H-shaped steel beam is fixedly connected to the outer side wall of the steel pipe column, and the other end of the H-shaped steel beam extends into the U-shaped steel beam, so that the two side edges of the top of the H-shaped steel beam along the length direction are located above the two side edges of the top of the U-shaped steel beam along the length direction and are fixedly connected thereto; A plurality of shear connectors (4) are also provided on the inner wall surface of the bottom of the U-shaped steel beam. The shear connectors are located on both sides of the width direction of the U-shaped steel beam, and their length direction is consistent with that of the U-shaped steel beam. The bottom of the shear connector is fixedly connected to the U-shaped steel beam. A plurality of shear bolts (5) are also provided in the U-shaped steel beam. The length direction of the shear bolts is perpendicular to the length direction of the U-shaped steel beam. After the shear bolts penetrate the web of the H-shaped steel beam, the two ends of the shear bolts respectively penetrate the opposite side walls of the U-shaped steel beam and are fixedly connected to the U-shaped steel beam. Concrete is poured into the steel pipe column and the inside of the U-shaped steel beam to form the node.
2. The node according to claim 1, characterized in that: The shear-resistant connector is provided with a plurality of openings (6), the openings penetrating two opposite side walls of the shear-resistant connector and being distributed at intervals along the length direction of the shear-resistant connector.
3. The node according to claim 1, characterized in that: The U-shaped steel beam is bent inwardly at both side edges along its length direction and then continues to extend to form an upper flange I (7), and a gap is provided between the two upper flanges I of the U-shaped steel beam; the H-shaped steel beam comprises an upper flange II (8), a web (9) and a lower flange (10), the upper flange II and the lower flange are both arranged in a horizontal direction, and opposite sides of the web are respectively fixedly connected to the upper flange II and the lower flange; the upper flange II of the H-shaped steel beam is located above the two upper flanges I of the U-shaped steel beam, and the upper flange II can cover the gap between the two upper flanges I; the opposite side edges of the upper flange II along its width direction are respectively fixedly connected to the upper flange I of the U-shaped steel beam.
4. The node according to claim 3, characterized in that: The upper flange I of the U-shaped steel beam is fixedly connected to the outer side wall of the steel pipe column.
5. The node according to claim 3, characterized in that: The lower flange of the H-shaped steel beam is located inside the U-shaped steel beam and has a spacing from the bottom of the U-shaped steel beam.
6. The node according to claim 5, characterized in that: A plurality of shear studs (11) are provided on the lower flange of the H-shaped steel beam. The shear studs are spaced apart along the length direction of the lower flange of the H-shaped steel beam. One end of the shear stud is fixedly connected to the lower flange of the H-shaped steel beam, and the other end of the shear stud is spaced a certain distance from the bottom of the U-shaped steel beam.
7. The node according to claim 3, characterized in that: A plurality of upper inner baffles (12) and lower inner baffles (13) are provided in the steel pipe column, wherein the upper inner baffles are fixedly connected to the inner side wall of the steel pipe column, and the upper side surface thereof is flush with the upper flange II of the H-shaped steel beam; and the lower inner baffles are fixedly connected to the inner side wall of the steel pipe column, and the lower side surface thereof is flush with the lower flange of the H-shaped steel beam; Through holes (14) are provided on both the upper inner partition plate and the lower inner partition plate, and the through holes penetrate the opposite side walls of the upper inner partition plate and the lower inner partition plate.
8. A construction method for a U-shaped steel-concrete composite beam-steel tube concrete column lap joint, characterized in that: The steps of the construction method of any node described in claims 1 to 7 are as follows: (1) Processing of each component in the factory: welding shear studs on the lower flange of the H-shaped steel beam, and then welding and fixing one end of the H-shaped steel beam to the steel pipe column; at the same time, welding a shear connector at the bottom of the U-shaped steel beam; (2) After the above components are transported to the construction site, the steel pipe column is installed and positioned, and the concrete is poured to a certain strength, the U-shaped steel beam is gradually lifted from the bottom to the top, so that the H-shaped steel lower flange beam on the steel pipe column passes through the gap between the upper flange (7) of the U-shaped steel beam, and the upper flange of the U-shaped steel beam is slowly lifted to the bottom of the upper flange of the H-shaped steel beam, and the U-shaped steel beam and the H-shaped steel beam are fixed by shear bolts; then, the U-shaped steel beam is welded to fix the upper flange I of the U-shaped steel beam to the upper flange II of the H-shaped steel beam; (3) Pour concrete inside the U-shaped steel and vibrate it to make it dense until the concrete reaches a certain strength.