U-shaped steel concrete composite beam-concrete filled steel tubular column lap joint type joint
By incorporating H-shaped steel beams and shear connectors within U-shaped steel beams, and utilizing shear bolts and concrete for force transfer, the welding challenges in connecting U-shaped steel-concrete composite beams with steel-concrete composite columns were resolved. This resulted in efficient and stable node connections, enhancing the load-bearing capacity and ductility of the nodes.
Patent Information
- Application Number
- CN202423161074.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In existing technologies, the connection between U-shaped steel-concrete composite beams and steel-concrete composite columns is difficult to weld, involves a large workload, and makes it hard to guarantee the quality of the weld. Welding in the cold bending zone affects the performance of the joint, resulting in a reduction in load-bearing capacity and ductility, and poses a safety hazard, especially under seismic loading.
The design employs a U-shaped steel beam with an H-shaped steel beam and shear connectors inside. Force is transferred through shear bolts and concrete, avoiding direct welding of the lower flange of the U-shaped steel beam. The H-shaped steel beam is fixed by under-welding and shear bolts to form a closed integral structure, ensuring clear transmission of internal forces.
It reduces welding difficulty and workload, improves construction efficiency and quality, enhances the stability and overall performance of the joint, reduces the adverse effects of welding in the cold bending zone, and improves the load-bearing capacity and ductility of the joint.
Smart Images
Figure CN223548718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building structure technology, specifically to a U-shaped steel-concrete composite beam-steel-concrete composite column lap joint. Background Technology
[0002] U-shaped steel-concrete composite beams, as a novel composite structure, have attracted widespread attention due to their ability to fully utilize the mechanical advantages of both steel and concrete. Steel possesses high tensile strength, while concrete excels in compressive strength; the combination of the two not only improves the load-bearing capacity and stiffness of the component but also endows it with good ductility. To reduce costs and improve production efficiency, U-shaped steel beams are typically produced in standardized batches using thin steel plates through a cold-bending process.
[0003] However, in practical applications, when connecting U-shaped steel-concrete composite beams with steel-concrete composite columns, some technical difficulties are encountered, especially the connection method in the joint area. Traditional joint connection methods mainly include inner diaphragm, through diaphragm or outer ring plate, etc. These methods mostly rely on on-site welding operations. In actual construction, the following problems exist: (1) High welding difficulty: Since U-shaped steel is a semi-closed section, it means that welding operations need to be carried out from different angles during installation, including overhead welding, vertical welding and flat welding, etc. However, these welding postures increase the complexity and difficulty of construction, especially when operating in a limited space, the skill requirements of workers are extremely high; (2) Large welding workload: Traditional connection methods require a lot of welding work, which not only prolongs the construction time, but also increases labor costs. Moreover, too many welds may introduce more defect points, affecting the overall structural quality; (3) Difficulty in guaranteeing weld quality: The on-site welding environment is unstable and easily affected by weather conditions, worker skill level, etc. The influence of factors leads to inconsistent weld quality, especially for welds in overhead welding positions, which makes inspection and repair more difficult and poses a great safety hazard; (4) Welding problems in the cold bending zone: After the U-shaped steel is cold-bent, there is stress concentration in its bending part. If welding is carried out in this area, it will further aggravate the hardening effect of the material, making the weld weak and reducing its toughness and durability. In this case, even under normal use conditions, cracks or other forms of damage may occur, thereby weakening the load-bearing performance of the node; (5) Reduced load-bearing capacity and ductility of the node: The combined effect of all the above factors may eventually lead to a decrease in the load-bearing capacity and ductility of the node, which poses a threat to the safety and reliability of the entire structure; especially under earthquake action, the node may fail prematurely and cannot effectively transfer the load, thereby endangering the safety of the building. Utility Model Content
[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a U-shaped steel-concrete composite beam-steel-concrete composite column lap joint, so as to solve the problems of high welding difficulty, large welding workload, difficulty in guaranteeing weld quality, adverse effects caused by welding in the cold bending zone, and ultimately reduced joint bearing capacity and ductility in actual construction.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] A U-shaped steel-concrete composite beam-steel-concrete composite column lap joint includes a vertically arranged steel pipe column and U-shaped steel beams spaced circumferentially around the steel pipe column. An H-shaped steel beam is installed inside the U-shaped steel beams, with the length direction of the H-shaped steel beam aligned 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 extends into the U-shaped steel beam, such that the two edges of the top of the H-shaped steel beam along its length direction are located above and fixedly connected to the two edges of the top of the U-shaped steel beam along its length direction. At the bottom of the U-shaped steel beam... The inner wall surface is also provided with multiple shear connectors, which are located on both sides of the width direction of the U-shaped steel beam and have the same length direction as the U-shaped steel beam. The bottom of the shear connector is fixedly connected to the U-shaped steel beam. Multiple shear bolts are also provided inside 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 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 U-shaped steel beam to form the node.
[0007] Preferably, the shear connector has multiple openings that penetrate the opposite side walls of the shear connector and are spaced apart along the length of the shear connector.
[0008] Preferably, the U-shaped steel beam bends inward along its length direction at both edges to form upper flanges 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, both upper flange II and lower flange are arranged in the horizontal direction, and the opposite sides of the web are fixedly connected to the upper flange II and 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 sides of the upper flange II along its width direction are fixedly connected to the upper flange I of the U-shaped steel beam respectively.
[0009] Preferably, the upper flange I of the U-shaped steel beam is fixedly connected to the outer wall of the steel pipe column.
[0010] Preferably, the lower flange of the H-shaped steel beam is located inside the U-shaped steel beam and has a gap between it and the bottom of the U-shaped steel beam.
[0011] Preferably, a plurality of shear studs are provided on the lower flange of the H-shaped steel beam. The shear studs are distributed at intervals along the length 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 is at a certain distance from the bottom of the U-shaped steel beam.
[0012] Preferably, a plurality of upper inner partitions and lower inner partitions are provided inside the steel pipe column. The upper inner partitions are fixedly connected to the inner wall of the steel pipe column, and their upper surface is flush with the upper flange II of the H-shaped steel beam. The lower inner partitions are fixedly connected to the inner wall of the steel pipe column, and their lower surface is flush with the lower flange of the H-shaped steel beam.
[0013] Preferably, through holes 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.
[0014] This utility model also provides a construction method for a U-shaped steel-concrete composite beam-steel-concrete composite column lap joint. The construction method steps for the above-mentioned joint are as follows:
[0015] (1) Process each component in the factory: weld shear studs to the lower flange of the H-shaped steel beam, and then weld one end of the H-shaped steel beam to the steel pipe column for fixation; at the same time, weld shear connectors at the bottom of the U-shaped steel beam.
[0016] (2) Transport the above components to the construction site. After the steel pipe column is installed and positioned and the concrete is poured to a certain strength, gradually lift the U-shaped steel beam from bottom to top so that the lower flange beam of the H-shaped steel on the steel pipe column passes through the gap between the upper flange (7) of the U-shaped steel beam. After slowly lifting the upper flange of the U-shaped steel beam to below the upper flange of the H-shaped steel beam, fix the U-shaped steel beam and the H-shaped steel beam together with shear bolts. Then, perform welding operation on the U-shaped steel beam to weld and fix the upper flange I of the U-shaped steel beam and the upper flange II of the H-shaped steel beam.
[0017] (3) Pour concrete inside the U-shaped steel and vibrate it until it is compacted. Once the concrete reaches a certain strength, it can be poured into the U-shaped steel.
[0018] Compared with the prior art, the present invention has the following advantages:
[0019] 1. This utility model incorporates multiple shear connectors at the bottom of the U-shaped steel beam. These connectors effectively transfer the internal force borne by the lower flange of the U-shaped steel beam to the internal concrete, which then transfers this internal force to the lower flange of the H-shaped steel beam, which is welded with shear studs. This lap-joint force transfer method avoids the need for direct welding of the lower flange of the U-shaped steel beam, thereby reducing on-site welding workload and eliminating the operational difficulties associated with overhead welding. Simultaneously, this utility model uses shear bolts to fix the H-shaped steel beam and the U-shaped steel beam, ensuring that the internal force of the U-shaped steel beam's web can be transferred to the H-shaped steel beam's web through the shear bolts. This not only replaces traditional web welding but also provides installation positioning with the shear bolts, ensuring precise alignment between the two.
[0020] 2. The improvements made to the node structure in this utility model clarify the internal force transmission mechanism. During on-site construction, the upper flange of the U-shaped steel beam and the upper flange of the H-shaped steel beam can be fixedly connected simply by welding them together. Compared with traditional welding methods, this approach greatly reduces the welding difficulty. Since welding is relatively easy to operate and less affected by environmental factors, it also reduces the time and labor costs required for welding. At the same time, the shear bolts enable rapid positioning, and with only simple welding required, the entire installation process becomes more efficient and faster, improving the convenience of construction. This is of great significance for accelerating project progress and shortening the construction period.
[0021] 3. The node described in this utility model can avoid welding in the cold bending zone. In traditional methods, welding in the cold bending area of the U-shaped steel will cause material hardening, making the weld weak and affecting the load-bearing capacity and ductility of the node. However, this utility model completely avoids this problem through reasonable force transmission path design, ensuring the stability and reliability of the node in long-term use. At the same time, this utility model also enhances the overall performance of the node. 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 integral structure. The upper and lower flanges of the H-shaped steel beam are flush with the upper and lower inner diaphragms in the steel pipe column, respectively, further enhancing the overall rigidity and bending resistance of the node.
[0022] 4. The node described in this utility model reduces unnecessary welding parts, and the corresponding amount of welding materials is also reduced. This further simplifies the construction process of the node described in this utility model, and helps to reduce labor costs and other indirect expenses. All components used in the node can be produced in a standardized mass 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. Attached Figure Description
[0023] Figure 1This is a structural schematic diagram of a U-shaped steel-concrete composite beam-steel-concrete composite column lap joint according to the present invention.
[0024] Figure 2 This is a schematic diagram of the structure after the H-shaped steel beam is connected to the steel pipe column.
[0025] Figure 3 This is a schematic diagram of a U-shaped steel beam.
[0026] Figure 4 This is a schematic diagram of the structure after the upper inner partition is connected to the steel pipe column, H-shaped steel beam, and U-shaped steel beam.
[0027] In the diagram: 1. Steel pipe column; 2. U-shaped steel beam; 4. Shear connector; 5. Shear bolt; 6. Opening; 7. Upper flange I; 8. Upper flange II; 9. Web plate; 10. Lower flange; 11. Shear stud; 12. Upper inner diaphragm; 13. Lower inner diaphragm; 14. Through hole. Detailed Implementation
[0028] This utility model will be clearly and completely described with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on this utility model are within the protection scope of this utility model.
[0029] This utility model provides a U-shaped steel-concrete composite beam-steel-concrete composite column lap joint, such as... Figures 1-4 As shown, the structure includes a vertically arranged steel pipe column 1 and U-shaped steel beams 2 spaced circumferentially around the steel pipe column. An H-shaped steel beam is installed inside the U-shaped steel beams, with its length direction aligned with that of the U-shaped steel beams. One end of the H-shaped steel beam is fixedly connected to the outer wall of the steel pipe column, and its other end extends into the U-shaped steel beam, such that the two edges of the top of the H-shaped steel beam along its length direction are above and fixedly connected to the two edges of the top of the U-shaped steel beam along its length direction. Multiple shear connectors 4 are also provided on the inner sidewall of the bottom of the U-shaped steel beams. These shear connectors are located on both sides of the width direction of the U-shaped steel beams, with their length direction aligned with that of the U-shaped steel beams. The bottom of each shear connector is fixedly connected to the U-shaped steel beams. Multiple shear bolts 5 are also provided inside the U-shaped steel beams. The length direction of each shear bolt is perpendicular to the length direction of the U-shaped steel beams, and after penetrating the web of the H-shaped steel beams, both ends of the shear bolts pass through opposite sidewalls of the U-shaped steel beams and are fixedly connected to the U-shaped steel beams.
[0030] After studying existing technologies, this invention improves the node structure to solve technical problems. The primary consideration is clarifying the force transmission process. Therefore, this invention features a shear connector on the inner sidewall of the bottom of the U-shaped steel beam. This connector transfers the internal force borne by the lower flange of the U-shaped steel beam to the internal concrete, which then transfers it to the lower flange of the H-shaped steel beam. This lap-joint force transmission design avoids the need for welding the lower flange of the U-shaped steel beam, thus eliminating the complex and quality-constrained overhead welding operation. In contrast, traditional methods require welding the lower flange of the U-shaped steel beam, which not only increases construction difficulty but also easily leads to welding quality problems. After installation and positioning, only overhead welding of the upper flange of the U-shaped steel beam to the upper flange of the H-shaped steel beam is required on site. Because overhead welding is relatively easy to operate and less affected by environmental factors, it can greatly improve welding quality and efficiency. In contrast, traditional methods often require multiple welding methods such as overhead welding, vertical welding, and flat welding to achieve an effective connection between the U-shaped steel beam and the steel pipe column. This places higher demands on the workers' technical skills and increases construction time and costs. This invention also incorporates shear bolts that penetrate the web of the H-shaped steel beam and are fixedly connected to the side walls of the U-shaped steel beam. This ensures that the internal forces of the U-shaped steel beam's web can be transferred to the web of the H-shaped steel beam through the shear bolts. In existing technologies, extensive welding is typically required to ensure the connection strength of the web, which is time-consuming, labor-intensive, and increases construction costs. This invention replaces traditional web welding, simplifying the on-site construction process. Furthermore, the shear bolts also serve a positioning function, making the connection between the U-shaped and H-shaped steel beams more precise and reducing the risk of rework due to positional deviations.
[0031] In some embodiments of this utility model, the shear connector has multiple openings 6, which penetrate the opposite side walls of the shear connector and are spaced apart along the length of the shear connector. After concrete is poured into the U-shaped steel beam, the presence of the openings on the shear connector allows the concrete to form a PBL connection with the shear connector, enabling the internal force borne by the lower flange of the U-shaped steel beam to be more clearly transmitted to the internal concrete through the shear connector, and then transmitted by the concrete to the lower flange of the H-shaped steel beam through shear studs.
[0032] In some embodiments of this utility model, the U-shaped steel beam bends inward along its two edges along its length 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 flanges of the U-shaped steel < the width of the upper flange of the H-shaped steel. This is to ensure that the H-shaped steel beam can be fitted into the U-shaped steel beam, thereby ensuring smooth installation on site. Meanwhile, the relationship between the thickness of the lower flange of the H-beam, the thickness of the upper flange II, and the thickness of the upper flange of the U-beam is: lower flange thickness of the H-beam > upper flange thickness of the H-beam > upper flange thickness of the U-beam. This is to achieve a strong connection, that is, to ensure that the tensile bearing capacity of the lower flange of the H-beam is greater than that of the lower flange of the U-beam, and the tensile bearing capacity of the upper flange of the H-beam is greater than that of the upper flange of the U-beam. Both the upper flange II and the lower flange are set horizontally, 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-beam is located above the two upper flanges I of the U-beam, and the upper flange II can cover the gap between the two upper flanges I. The opposite edges of the upper flange II along its width direction are fixedly connected to the upper flange I of the U-beam. The upper flange I of the U-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 has a gap between it and the bottom of the U-shaped steel beam. This gap is to allow sufficient concrete between the H-shaped and U-shaped steel beams for force transfer through the overlap. Multiple shear studs 11 are provided on the lower flange of the H-shaped steel beam. These shear studs are spaced apart along the length of the lower flange of the H-shaped steel beam. One end of each shear stud is fixedly connected to the lower flange of the H-shaped steel beam, while the other end is spaced apart from the bottom of the U-shaped steel beam. The shear studs are anchored in the concrete between the H-shaped and U-shaped steel beams, further enhancing the force transfer effect through the overlap between the two beams. Multiple upper inner diaphragms 12 and lower inner diaphragms 13 are installed inside the steel pipe column. The upper inner diaphragms are fixedly connected to the inner wall of the steel pipe column, and their upper surface is flush with the upper flange II of the H-shaped steel beam. The lower inner diaphragms are also fixedly connected to the inner wall of the steel pipe column, and their lower surface is flush with the lower flange of the H-shaped steel beam. The upper and lower inner diaphragms ensure the continuity of force transmission around the column, enhancing the load-bearing capacity and overall integrity of the joint. Through holes 14 are provided on both the upper and lower inner diaphragms, penetrating the opposite side walls of the upper and lower inner diaphragms. These through holes ensure continuous pouring of concrete inside the column, improving the overall integrity of the steel-concrete composite column. This invention forms a closed, integrated 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 and lower inner diaphragms inside the steel pipe column, further enhancing the overall stiffness and bending resistance of the joint.
[0033] Specific construction process: First, in the factory, shear studs are welded to 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, shear connectors are welded to 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, positioned, and the concrete is poured to a certain strength, the U-shaped steel beam is gradually lifted from bottom to top, so that the lower flange beam of the H-shaped steel 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 connected. After the flange is slowly raised to below the upper flange of the H-shaped steel beam, the U-shaped steel beam and the H-shaped steel beam are fixed together using shear bolts. Next, welding is performed on the U-shaped steel beam, welding the upper flange I of the U-shaped steel beam to the upper flange II of the H-shaped steel beam. Only the upper flange of the U-shaped steel beam needs to be welded to the H-shaped steel beam; welding the U-shaped steel beam to the steel pipe column is not required. Finally, concrete is poured inside the U-shaped steel beam and vibrated to ensure compaction. Once the concrete reaches a certain strength, the beam-column joint can be lapped to transfer force. Throughout the entire on-site construction process, only the above welding operations are required, significantly reducing the amount of welding work.
[0034] This utility model is not limited to the above-described embodiments. Any structure that is the same as or similar to the above-described embodiments of this utility model is within the protection scope of this utility model.
[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.
Claims
1. A U-shaped steel-concrete composite beam-steel-concrete composite column lap joint, characterized in that, It includes a vertically arranged steel pipe column (1) and U-shaped steel beams (2) distributed circumferentially around the steel pipe column; an H-shaped steel beam is provided 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 wall of the steel pipe column, and the other end extends into the U-shaped steel beam, so that the two sides of the top of the H-shaped steel beam along its length direction are located above the two sides of the top of the U-shaped steel beam along its length direction and are fixedly connected to it; Multiple shear connectors (4) are provided on the inner sidewall surface at 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 connectors is fixedly connected to the U-shaped steel beam. Multiple shear bolts (5) are also provided inside 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 pass through the opposite sidewalls 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 U-shaped steel beam to form the node.
2. The node according to claim 1, characterized in that, The shear connector has multiple openings (6) that penetrate the opposite side walls of the shear connector and are spaced apart along the length of the shear connector.
3. The node according to claim 1, characterized in that, The U-shaped steel beam bends inward along its length direction at both sides 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), both the upper flange II and the lower flange are set 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 sides of the upper flange II along its width direction are fixedly connected to the upper flange I of the U-shaped steel beam respectively.
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 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 gap between it and the bottom of the U-shaped steel beam.
6. The node according to claim 5, characterized in that, Multiple shear studs (11) are provided on the lower flange of the H-shaped steel beam. The shear studs are distributed at intervals along the length 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 is at a certain distance from the bottom of the U-shaped steel beam.
7. The node according to claim 3, characterized in that, Multiple upper inner partitions (12) and lower inner partitions (13) are provided inside the steel pipe column. The upper inner partitions are fixedly connected to the inner wall of the steel pipe column, and their upper surface is flush with the upper flange II of the H-shaped steel beam. The lower inner partitions are fixedly connected to the inner wall of the steel pipe column, and their lower surface is flush with the lower flange of the H-shaped steel beam. 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.