A MiC system for steel-concrete structures based on composite constraints

Abstract

The present invention provides a composite-constraint steel-concrete MiC system, which relates to the field of modular integrated building technology. The system comprises several steel-concrete container-type frames and a connecting plate structure. The steel-concrete container-type frames include support columns, upper crossbeams, lower crossbeams, upper longitudinal beams, and lower longitudinal beams. The upper longitudinal beams are connected to the upper ends of the support columns, and the lower longitudinal beams are connected to the lower ends of the support columns. The upper crossbeams are connected to the upper ends of the support columns via upper beam-column node members, and the lower crossbeams are connected to the lower ends of the support columns via lower beam-column node members. The support columns, upper crossbeams, lower crossbeams, and upper longitudinal beams all comprise coaxially arranged outer steel pipes and inner steel pipes, with concrete filling between them. The present invention "productizes" and "industrializes" buildings, offering advantages such as simple structure, easy installation, good stability, and low production cost, achieving a more efficient, higher-quality, safer, and more environmentally friendly construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of modular integrated buildings, in particular to a steel-concrete structure MiC system based on composite constraints. Background Art

[0002] In recent years, with the continued transformation and upgrading of the construction industry, prefabricated buildings have gradually become a mainstream market trend. As a new form of prefabricated construction, prefabricated steel containerized housing shifts much of the traditional on-site construction work to the factory. Building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) are manufactured in the factory and transported to the construction site for assembly and installation, forming a complete building system. This construction model not only significantly reduces construction waste on site but also offers advantages such as rapid construction, high recycling rates, and multiple uses, making it widely popular.

[0003] However, in the context of the rapid development of prefabricated buildings, the existing technology still has many shortcomings, especially in the field of modular integrated construction (MiC). For example, Chinese patent publication No. CN116427531A proposes a new type of laminated beam concrete MiC structural system, the core of which is to achieve a reliable connection between the upper and lower modules through a tie rod type connection node. Specifically, the technical solution includes at least two bottom concrete modules and at least two upper concrete modules, wherein the bottom concrete modules are arranged horizontally and connected to each other, and the upper concrete modules are arranged above the bottom concrete modules and are also connected to each other. It is worth noting that the connection between the bottom concrete module and the upper concrete module is completed through a tie rod type connection node.

[0004] According to the aforementioned patent, the core structure of the tie-rod connection node is as follows: a connecting screw is inserted through an inner steel tube, and its ends are screwed into two screw sleeves located above and below. During installation, the first modular column is fixed to the building foundation. The screw sleeve, fixed to the building foundation, extends into the inner steel tube through the expanded bore tube at the bottom of the first modular column. Subsequently, a connecting screw located inside the first or second modular column is screwed into the screw sleeve, and the column end plate is connected to the building foundation via a bottom fixing plate. While this design achieves a certain degree of rapid assembly and reliable connection for modular buildings, it still has several significant drawbacks. First, the tie-rod connection node comprises multiple materials and components (such as the modular connection plate, column end plate, and expanded bore tube), resulting in a complex structure and cumbersome installation. Furthermore, to achieve complete installation and fixation, a connecting screw must be substantially the same length as the first or second modular column. This means that the connecting screw must be as long as the entire height of the modular column, which not only increases material costs but also may result in unnecessary resource waste during actual construction. Summary of the Invention

[0005] The present invention overcomes the shortcomings of the prior art and provides a steel-concrete structure MiC system based on composite constraints, which has the advantages of simple structure, convenient installation, good stability and low production cost, and realizes a more efficient, higher quality, safer and more environmentally friendly construction process.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] A composite-constraint-based steel-concrete MiC system includes several steel-concrete container frames and a connecting plate structure connecting adjacent frames.

[0008] The steel-concrete container frame includes support columns, upper crossbeams, lower crossbeams, upper longitudinal beams and lower longitudinal beams;

[0009] The upper longitudinal beam is connected to the upper end of the support column, and the lower longitudinal beam is connected to the lower end of the support column;

[0010] The upper cross beam is connected to the upper end of the support column through an upper beam-column node member, and the lower cross beam is connected to the lower end of the support column through a lower beam-column node member;

[0011] The support columns, upper cross beams, lower cross beams and upper longitudinal beams all comprise coaxially arranged outer steel pipes and inner lining steel pipes, and the space between the two is filled with concrete;

[0012] The upper surface of the connecting plate structure is provided with a first positioning pin and a second positioning pin, and the lower surface is provided with a third positioning pin and a fourth positioning pin;

[0013] The first positioning pin is coaxial with the third positioning pin, and the second positioning pin is coaxial with the fourth positioning pin;

[0014] Plate connecting holes are provided on both sides of the connecting plate structure;

[0015] The upper beam-column node member is provided with a pin hole and a first connection hole, the lower beam-column node member is provided with a second connection hole, and the pin hole corresponds to the axis of the support column;

[0016] The ratio of the distance L1 between the first or third positioning pin and the connecting hole of the same side panel, the distance L2 between the center of the cross section of the support column and the first connecting hole, and the distance L3 between the center of the cross section of the support column and the second connecting hole is 1:1:1.

[0017] The upper beam-column node member is provided with a first cavity with a height of H1, and the lower beam-column node member is provided with a second cavity with a height of H2;

[0018] The invention also includes a fastener, which passes through the first connecting hole and the second connecting hole to fix the upper beam-column node member and the lower beam-column node member of the upper and lower adjacent steel-concrete structure container-type frames;

[0019] And the height H3 of the fastener satisfies: H3 <min(H1,H2)。

[0020] Furthermore, the distance L4 between the first positioning pin and the second positioning pin, or the distance L4 between the third positioning pin and the fourth positioning pin, satisfies: L4≥2L5, where L5 is the distance from the center of the cross section of the support column to the boundary.

[0021] Furthermore, the outer protective steel pipe is in the shape of a square tube, and its inner wall is provided with rough texture;

[0022] The outer wall of the lining steel pipe is spirally welded with convex ribs, the rib pitch is 200mm~500mm, and the height is 6mm~12mm;

[0023] The radius R of the inner lining steel pipe and the side length L6 of the outer protective steel pipe satisfy: R: L6=1:(3.2~3.6).

[0024] Furthermore, the bottom and top of the steel-concrete container-type frame are respectively provided with middle connecting plates, on which third connecting holes are opened;

[0025] A cross bar group is also provided on the top of the steel-concrete structure container-type frame, and the cross bar group is connected with a supporting plate to form a supporting surface.

[0026] Furthermore, the first chamber and the second chamber are arranged outward and in the same direction.

[0027] Furthermore, the heads of the first positioning pin, the second positioning pin, the third positioning pin and the fourth positioning pin are truncated cone-shaped;

[0028] The length of each positioning pin is greater than the depth of the pin hole to enhance the lateral anti-slip capability.

[0029] Furthermore, the lower longitudinal beam is in an I-shape, with concrete-filled spaces formed on both sides for pouring to form concrete side blocks; wherein the middle portion of the lower longitudinal beam has a hollow position to allow the concrete side blocks on both sides to be connected and fixed as one;

[0030] A T-shaped floor slab is provided between the lower longitudinal beams on both sides, and its edges are overlapped on the lower longitudinal beams.

[0031] Furthermore, the fastener is a hexagonal bolt; the second connecting hole is formed with a hexagonal countersink, the depth of the hexagonal countersink is 1 / 3 to 1 / 2 of the total depth of the second connecting hole, which is used to limit the rotation of the hexagonal bolt.

[0032] Furthermore, the inner wall of the hexagonal countersunk position is provided with an inclined wedge, and when tightened, the side surface of the hexagonal bolt forms a surface contact with the inclined surface of the inclined wedge.

[0033] Furthermore, the area on the outer wall of the lined steel pipe where the ribs are formed is covered with an anti-corrosion layer; the anti-corrosion layer is a zinc-based or epoxy resin anti-corrosion layer with a thickness of 0.1~0.3mm.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention has the significant advantages of simple structure and convenient installation. The positioning pin design adopted by the connecting plate structure provides a strong guarantee for the precise positioning and efficient installation of adjacent steel-concrete container frames. In the actual construction process, after the hole positions of the connecting plate structure, the upper beam-column node component and the lower beam-column node component are accurately aligned, it is only necessary to install the fasteners and tighten them to complete the connection. The whole process is simple and easy. In addition, the number of connecting parts of the invention is relatively small, which effectively reduces the use of raw materials and processing steps, thereby significantly reducing the production cost.

[0036] 2. The rough texture and ribbed design between the outer steel pipe and the inner lining greatly enhances the bond with the concrete. The ribs not only increase the supporting strength of the inner lining pipe itself but also form a synergistic working mechanism with other structures. The interaction and synergy between these structures significantly improves the overall performance and stability of the structure, enabling it to better withstand various loads and external forces, providing a solid foundation for the safe and reliable operation of the building structure.

[0037] 3. The innovative design of hexagonal countersunk and beveled wedges greatly facilitates the installation and locking of fasteners. During construction, fastener installation and locking operations can be completed quickly and accurately, effectively reducing construction time and labor intensity, and significantly improving construction efficiency. This design not only helps accelerate project progress but also ensures the stability and reliability of construction quality, providing strong support for the smooth implementation of construction projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present invention and are used to explain the present invention together with the embodiments of the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is an overall diagram of the steel-concrete structure MiC system based on composite constraints;

[0040] Figure 2 This is a schematic diagram of the separation of T-shaped floor slabs and concrete side blocks in the steel-concrete structure MiC system based on composite constraints;

[0041] Figure 3 This is a schematic diagram of the steel-concrete MiC system based on composite constraints, with the T-shaped floor slab and concrete side blocks removed;

[0042] Figure 4 This is an enlarged view of the support column;

[0043] Figure 5 This is a diagram of four steel-concrete container frames connected by connecting plate structures. Figure 1 ;

[0044] Figure 6 This is a diagram of four steel-concrete container frames connected by connecting plate structures. Figure 2 ;

[0045] Figure 7 This is an enlarged view of the lower longitudinal beam;

[0046] Figure 8 1. It is a structural diagram of the first embodiment of the lower beam-column node component;

[0047] Figure 9 2 is a structural diagram of a second embodiment of a lower beam-column node member;

[0048] Figure 10 2 is a schematic diagram of the initial state after the fastener is installed in the second connection hole of the lower beam-column node member in the second embodiment;

[0049] Figure 11 This is a schematic diagram of the locking process after the fastener is installed in the second connection hole of the second embodiment of the lower beam-column node component.

[0050] In the figure: 1. Support column; 101. External steel pipe; 102. Lining steel pipe; 103. Concrete; 2. Upper crossbeam; 3. Lower crossbeam; 4. Upper longitudinal beam; 5. Lower longitudinal beam; 501. Concrete filling space; 502. Hollow position; 6. Upper beam-column node component; 601. Pin hole; 602. First connecting hole; 603. First cavity; 7. Lower beam-column node component; 701. Second connecting hole; 7011. Hexagonal countersunk position; 702. Second cavity; 8. Connecting plate structure; 801. First locating pin; 802. Second locating pin; 803. Third locating pin; 804. Fourth locating pin; 805. Plate connecting hole; 9. Middle connecting plate; 901. Third connecting hole; 10. Cross rod group; 11. Supporting plate; 12. T-shaped floor; 13. Wedge; 14. Fastener; 15. Concrete side block. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] The present invention discloses a composite-constraint steel-concrete MiC system, primarily composed of several steel-concrete container-like frames and a connecting plate structure 8 connecting adjacent frames. This structural design fully utilizes the material properties of steel and concrete, improving the overall performance and stability of the structure and making it suitable for a variety of building scenarios, such as residential and commercial buildings.

[0053] Specifically, if Figures 1 to 6 As shown, the steel-concrete container frame includes a support column 1, an upper crossbeam 2, a lower crossbeam 3, an upper longitudinal beam 4, and a lower longitudinal beam 5. The upper longitudinal beam 4 is connected to the upper end of the support column 1, the lower longitudinal beam 5 is connected to the lower end of the support column 1, the upper crossbeam 2 is connected to the upper end of the support column 1 through an upper beam-column node member 6, and the lower crossbeam 3 is connected to the lower end of the support column 1 through a lower beam-column node member 7.

[0054] The support column 1 , the upper cross beam 2 , the lower cross beam 3 and the upper longitudinal beam 4 all use a coaxially arranged outer protective steel pipe 101 and an inner lining steel pipe 102 , with concrete 103 filled between the two. Figure 4Taking the support column 1 as an example, the outer protective steel pipe 101 is a square tube, and its inner wall is provided with rough texture. This rough texture can be formed by inserting a rolling head into the inner wall of the outer protective steel pipe 101 and squeezing the inner wall of the pipe by a hydraulic pushing roller; the outer wall of the lining steel pipe 102 is spirally welded with ribs, the rib pitch is 200mm~500mm, and the height is 6mm~12mm. In this embodiment, the rib pitch is 250mm and the height is 8mm; the setting of rough texture and ribs can further enhance the bonding force between the lining steel pipe 102, the outer protective steel pipe 101 and the concrete 103, and improve the bearing capacity of the structure. In addition, the setting of the ribs itself also helps to enhance the supporting strength of the lining steel pipe 102, thereby enhancing the overall performance of the structure through the collaborative working ability of various structures.

[0055] The above combination of the outer steel pipe 101, the inner lining steel pipe 102 and the concrete 103 has the following advantages:

[0056] 1. High bearing capacity: The steel tube's restraining effect on the concrete fill places it under triaxial compression, helping to enhance its compressive strength. Furthermore, the concrete fill effectively suppresses local buckling of the thin-walled steel tube under compression, allowing the tube's full strength to be fully utilized. Compared to pure concrete components, the shear and torsional bearing capacities of concrete-filled steel tube components are also significantly improved.

[0057] 2. Achieve the equivalent effect of high-strength concrete: When Q235 steel pipes are used for the outer sheath steel pipe 101 and inner lining steel pipe 102, the standard compressive strength of the C30 and C40 concrete filled therein increases from 20MPa and 27MPa to 49MPa and 58MPa, respectively. When Q355 steel pipes are used for the outer sheath steel pipe 101 and inner lining steel pipe 102 and C40 concrete filled therein, the standard compressive strength increases from 27MPa to 70MPa. For steel tube concrete-filled compression components, the actual strength grade of the C30-C60 concrete inside the pipe is equivalent to that of C60-C120, achieving the application effect of high-strength concrete.

[0058] 3. Relaxation of axial compression ratio restrictions: CFST members do not need to strictly limit the axial compression ratio, which is equivalent to further improving the design potential of their compressive bearing capacity.

[0059] 4. Small cross-sectional dimensions: Compared to reinforced concrete columns, CFST columns, due to their high bearing capacity and lack of axial compression ratio restrictions, can reduce their cross-sectional dimensions by over 50%, and their cross-sectional area is also significantly reduced. This is because the bearing capacity of a steel-concrete column is approximately equal to the sum of the bearing capacities of its internal steel and the outer concrete; whereas the bearing capacity of a CFST column is nearly twice the sum of the bearing capacities of the steel tube and the core concrete.

[0060] 5. Excellent ductility: Under the restraint of the steel tube, the core concrete compressive failure mode changes from brittle to ductile. For steel tube concrete-filled compressive members with a hoop index θ ≥ 0.9, they exhibit excellent ductility under reciprocating horizontal loads, with a significantly improved ductility coefficient value (e.g., μ > 5).

[0061] 6. Avoid using thick steel plates with Z-direction performance requirements: Even when used in high-rise buildings, the wall thickness of the steel tubes used in steel tube concrete components usually does not exceed 40mm, and there is no need to use thick steel plates with Z-direction (plate thickness direction) performance requirements.

[0062] 7. Superior fire resistance: Because the core concrete of steel tube concrete columns absorbs a large amount of heat, it can effectively prolong the column's fire resistance in the event of a fire. Test data shows that to meet the first-level fire resistance requirement of 3 hours, the amount of fire retardant coating required for steel tube concrete columns can be reduced by more than 50% compared to pure steel columns.

[0063] 8. Large vertical compression deformation: Due to the high working compressive stress of steel tube concrete columns, the vertical compression elastic deformation they produce is greater than that of conventional reinforced concrete columns.

[0064] Furthermore, while this technical solution utilizes "external steel pipe 101 - concrete 103 - inner steel pipe lining 102" as the core structure of beams and columns, various combinations can be employed depending on building requirements. These combinations include, but are not limited to, composite systems such as steel pipe-concrete, steel pipe-concrete-steel pipe, steel pipe-concrete-steel pipe-concrete, concrete-steel pipe, concrete-steel pipe-concrete, and concrete-steel pipe-concrete-steel pipe. In the Modular Integrated Building (MIC) system, the columns utilize the aforementioned "steel-concrete" structure, while the beams can utilize hollow steel-concrete composite beams. These flexible combinations are not limited here, and all fall within the scope of protection of this patent application.

[0065] At the same time, the radius R of the inner lining steel pipe 102 and the side length L6 of the outer protective steel pipe 101 satisfy R: L6=1:(3.2~3.6). In this embodiment, R: L6=1:3.3. This ratio setting actually limits the size ratio between the cross-section of the inner lining steel pipe 102 and the cross-section of the outer protective steel pipe 101. In addition to ensuring that the inner lining steel pipe 102 meets sufficient strength, the amount of concrete 103 poured between the inner lining steel pipe 102 and the outer protective steel pipe 101 is increased as much as possible. Through the optimized design of this proportional relationship, the material consumption can be reasonably controlled to reduce costs while ensuring the structural strength.

[0066] The ribbed area on the outer wall of the inner lining steel pipe 102 is covered with an anti-corrosion layer. The anti-corrosion layer is zinc-based or epoxy-based and has a thickness of 0.1 to 0.3 mm. The anti-corrosion layer effectively prevents the inner lining steel pipe 102 from rusting and corrosion, extending the service life of the structure.

[0067] like Figure 5 as well as Figure 6 As shown, the upper surface of the connecting plate structure 8 is provided with a first locating pin 801 and a second locating pin 802, and the lower surface is provided with a third locating pin 803 and a fourth locating pin 804. The first locating pin 801 is coaxial with the third locating pin 803, and the second locating pin 802 is coaxial with the fourth locating pin 804. Plate connecting holes 805 are provided on both sides of the connecting plate structure 8. Among them, the ratio of the distance L1 from the first locating pin 801 or the third locating pin 803 to the plate connecting hole 805 on the same side, the distance L2 from the center of the cross section of the support column 1 to the first connecting hole 602, and the distance L3 from the center of the cross section of the support column 1 to the second connecting hole 701 is 1:1:1. The design of this distance ratio relationship facilitates the positioning and installation of the connecting plate structure 8 with the four adjacent steel-concrete structure container frames on the upper, lower, left and right sides.

[0068] The upper beam-column node member 6 is provided with a pin hole 601 and a first connection hole 602. The pin hole 601 corresponds to the axis of the support column 1 and is used to cooperate with the positioning pin to achieve positioning. The lower beam-column node member 7 is provided with a second connection hole 701. Figure 5 as well as Figure 6 As shown, when the upper and lower steel-concrete structure container-type frames are positioned and installed, after the third positioning pin 803 is inserted into the pin hole 601 (at this time, the first positioning pin 801 corresponds to the hollow part of the lining steel pipe 102 located at the upper support column 1), it can ensure that the plate connection hole 805 and the first connection hole 602 and the second connection hole 701 are also positioned synchronously. At this time, the fastener 14 is used to pass through the first connection hole 602, the plate connection hole 805 and the second connection hole 701 to fix the upper beam-column node component 6 and the lower beam-column node component 7 of the upper and lower adjacent steel-concrete structure container-type frames, which is very convenient.

[0069] The heads of the first, second, third, and fourth locating pins 801, 802, 803, and 804 are designed to be truncated cone-shaped, and each pin is longer than the depth of the pin hole 601 to enhance lateral anti-slip resistance. The truncated cone-shaped head design facilitates insertion of the locating pins into the pin holes 601, while the longer locating pins improve the stability of the structure under lateral forces and prevent relative displacement between the frames.

[0070] In this embodiment, the distance L4 between the first positioning pin 801 and the second positioning pin 802, or the distance L4 between the third positioning pin 803 and the fourth positioning pin 804, satisfies L4≥2L5, where L5 is the distance from the center of the cross-section of the support column 1 to the boundary. When L4 = 2L5, the adjacent steel-concrete structure container frames on the left and right can be closely installed through the connecting plate member structure 8. When L4>2L5, the adjacent steel-concrete structure container frames on the left and right can be installed with a certain gap through the connecting plate member structure 8. That is, this dimension design helps to achieve standardized installation, and the setting of this positioning pin and the spacing requirement can ensure accurate positioning and reliable connection when connecting adjacent steel-concrete structure container frames.

[0071] In this embodiment, the upper beam-column joint member 6 further has a first chamber 603 with a height of H1, and the first chamber 603 is arranged outward and in the same direction; the lower beam-column joint member 7 has a second chamber 702 with a height of H2, and the second chamber 702 is also arranged outward and in the same direction; the outward arrangement of the first chamber 603 and the second chamber 702 helps to put the fastener 14 and insert the locking tool into the fastener 14 for locking during installation. The height H3 of the fastener 14 satisfies H3 < min(H1, H2), and min(H1, H2) represents taking the minimum value of H1 or H2. Since the fastener 14 needs to be vertically placed into the first chamber 603 or the second chamber 702 and inserted into the first connection hole 602 and the second connection hole 701, the above dimension limitation is adopted to ensure that the fastener 14 can be normally installed and placed into the chambers of the upper beam-column joint member 6 or the lower beam-column joint member 7.

[0072] In addition, middle connecting plate members 9 are respectively provided at the bottom and top of the steel-concrete structure container frame, and third connection holes 901 are opened thereon. The third connection holes 901 in the middle connecting plate members 9 are used for locking and installing adjacent stacked steel-concrete structure container frames. A cross-bar group 10 is further provided at the top of the steel-concrete structure container frame. The cross-bar group 10 helps to enhance the overall strength of the steel-concrete structure container frame, and a supporting plate member is connected to the cross-bar group 10 to form a supporting surface, that is, the supporting plate member 11 can also be used as a support during stacking to improve the overall stability.

[0073] Combined with Figure 2 、 Figure 3 and Figure 7The lower longitudinal beam 5 is an I-shaped structure with concrete-filled spaces 501 on either side for pouring concrete side blocks 15, enhancing the support provided by the lower longitudinal beam 5. A hollow space 502 is located in the center of the lower longitudinal beam 5 to allow the concrete side blocks 15 to be connected and fixed during pouring. This ensures that the concrete side blocks 15 are securely fixed to the lower longitudinal beam 5 and are less likely to fall off or separate. A T-shaped floor slab 12 is located between the two lower longitudinal beams 5, with its edges overlapping the lower longitudinal beam 5.

[0074] Figure 8 It is a structural diagram of the first embodiment of the lower beam-column node member 7. In this embodiment, a nut is installed on the second connecting hole 701. At this time, the tail of the bolt can be passed through the first connecting hole 602 of the upper beam-column node member 6 from bottom to top and connected to the nut, which is convenient to operate.

[0075] Figures 9 to 11 This is a schematic diagram of the structure of a second embodiment of the lower beam-column joint member 7. In this embodiment, the fastener 14 is a hexagonal bolt. The second connecting hole 701 is formed with a hexagonal countersunk portion 7011. The depth of the hexagonal countersunk portion 7011 is 1 / 3 to 1 / 2 of the total depth of the second connecting hole 701, which is used to limit the rotation of the hexagonal bolt. In other words, when using this structure, the hexagonal bolt is inserted from bottom to bottom into the second connecting hole 701 with its head facing upward and its tail extending from the first connecting hole 602. The bolt is then locked by screwing a nut into the tail. At this time, the head of the hexagonal bolt is embedded in the hexagonal countersunk portion 7011. When the nut is tightened, the hexagonal bolt does not rotate with it, making it easier to operate and lock.

[0076] As a further improvement, the inner wall of the hexagonal countersunk 7011 is provided with an inclined wedge 13. When tightened, the side surface of the hexagonal bolt head forms surface contact with the inclined surface of the inclined wedge. Compared to a structure where the corner of the hexagonal bolt contacts the inner wall of the hexagonal countersunk 7011 for position limiting, this design is a surface contact position limiting structure. This can increase the blocking area of ​​the hexagonal countersunk 7011 on the hexagonal bolt head, resulting in a better limiting effect. The friction between the hexagonal bolt head and the hexagonal countersunk 7011 also improves the locking function to prevent the hexagonal bolt from rotating with it.

[0077] In general, the present invention has the significant advantages of simple structure and convenient installation. The positioning pin design adopted by the connecting plate structure 8 provides a strong guarantee for the precise positioning and efficient installation of the adjacent steel-concrete structure container-type frames. In the actual construction process, when the hole positions of the connecting plate structure 8, the upper beam-column node component 6 and the lower beam-column node component 7 are accurately aligned, it is only necessary to install the fastener 14 and tighten it to complete the connection. The whole process is simple and easy. In addition, the number of connecting parts of the invention is relatively small, which effectively reduces the use of raw materials and processing procedures, thereby significantly reducing the production cost. The rough texture and convex rib design adopted between the outer protective steel pipe 101 and the inner lining steel pipe 102 greatly enhances the bonding performance with the concrete. Among them, the setting of the convex rib not only improves the supporting strength of the inner lining steel pipe 102 itself, but also forms a cooperative working mechanism with other structures. Through the mutual cooperation and synergy between the various structures, the overall performance and stability of the structure are significantly improved, so that it can better withstand various loads and external forces, providing a solid foundation for the safe and reliable operation of the building structure. The innovative design of the hexagonal countersunk 7011 and the bevel wedge 13 greatly facilitates the installation and locking of the fastener 14. During construction, fastener 14 can be installed and locked quickly and accurately, effectively reducing construction time and labor intensity and significantly improving efficiency. This design not only helps accelerate project progress but also ensures stable and reliable construction quality, providing strong support for the smooth implementation of the construction project.

[0078] Through the above specific implementation methods, the efficient assembly and reliable use of the steel-concrete structure MiC system based on composite constraints can be achieved, giving full play to its structural advantages and meeting the needs of different construction projects.

[0079] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel-concrete structure MiC system based on composite constraints, characterized by: It includes several steel-concrete container frames and connecting plate structures connecting adjacent frames; The steel-concrete container frame includes support columns, upper crossbeams, lower crossbeams, upper longitudinal beams and lower longitudinal beams; The upper longitudinal beam is connected to the upper end of the support column, and the lower longitudinal beam is connected to the lower end of the support column; The upper crossbeam is connected to the upper end of the support column through an upper beam-column node member, and the lower crossbeam is connected to the lower end of the support column through a lower beam-column node member; The support columns, upper cross beams, lower cross beams and upper longitudinal beams all comprise coaxially arranged outer steel pipes and inner lining steel pipes, and the space between the two is filled with concrete; The upper surface of the connecting plate structure is provided with a first positioning pin and a second positioning pin, and the lower surface is provided with a third positioning pin and a fourth positioning pin; The first positioning pin is coaxial with the third positioning pin, and the second positioning pin is coaxial with the fourth positioning pin; Plate connecting holes are provided on both sides of the connecting plate structure; The upper beam-column node member is provided with a pin hole and a first connection hole, the lower beam-column node member is provided with a second connection hole, and the pin hole corresponds to the axis of the support column; The ratio of the distance L1 between the first or third positioning pin and the connecting hole of the same side panel, the distance L2 between the center of the cross section of the support column and the first connecting hole, and the distance L3 between the center of the cross section of the support column and the second connecting hole is 1:1:

1. The upper beam-column node member is provided with a first cavity with a height of H1, and the lower beam-column node member is provided with a second cavity with a height of H2; The invention also includes a fastener, which passes through the first connecting hole and the second connecting hole to fix the upper beam-column node member and the lower beam-column node member of the upper and lower adjacent steel-concrete structure container-type frames; And the height H3 of the fastener satisfies: H3 <min(H1,H2); The first chamber and the second chamber are outwardly facing and arranged in the same direction; The lower longitudinal beam is in an I-shape, with concrete-filled spaces formed on both sides for pouring to form concrete side blocks; wherein, the middle portion of the lower longitudinal beam has a hollow position to allow the concrete side blocks on both sides to be connected and fixed as one; A T-shaped floor slab is provided between the lower longitudinal beams on both sides, with its edges overlapped on the lower longitudinal beams; The fastener is a hexagonal bolt; the second connecting hole is formed with a hexagonal countersunk, the depth of which is 1 / 3 to 1 / 2 of the total depth of the second connecting hole, for limiting the rotation of the hexagonal bolt; The inner wall of the hexagonal countersunk position is provided with an inclined wedge, and when locked, the side surface of the hexagonal bolt forms a surface contact with the inclined surface of the inclined wedge.

2. The steel-concrete structure MiC system based on composite constraints according to claim 1 is characterized in that: The distance L4 between the first positioning pin and the second positioning pin, or the distance L4 between the third positioning pin and the fourth positioning pin, satisfies: L4≥2L5, where L5 is the distance from the center of the cross section of the support column to the boundary.

3. The steel-concrete structure MiC system based on composite constraints according to claim 1 is characterized in that: The outer protective steel pipe is in the shape of a square tube, and its inner wall is provided with rough lines; The outer wall of the lining steel pipe is spirally welded with convex ribs, the rib pitch is 200mm~500mm, and the height is 6mm~12mm; The radius R of the inner lining steel pipe and the side length L6 of the outer protective steel pipe satisfy: R: L6=1:(3.2~3.6).

4. The steel-concrete structure MiC system based on composite constraints according to claim 1 is characterized in that: The bottom and top of the steel-concrete container-type frame are respectively provided with middle connecting plates, each of which has a third connecting hole; A cross bar group is also provided on the top of the steel-concrete structure container-type frame, and the cross bar group is connected with a supporting plate to form a supporting surface.

5. The steel-concrete structure MiC system based on composite constraints according to claim 1 is characterized in that: The heads of the first positioning pin, the second positioning pin, the third positioning pin and the fourth positioning pin are truncated cone-shaped; The length of each positioning pin is greater than the depth of the pin hole to enhance the lateral anti-slip capability.

6. The steel-concrete structure MiC system based on composite constraints according to claim 3 is characterized by: The area on the outer wall of the lined steel pipe where the ribs are formed is covered with an anti-corrosion layer; the anti-corrosion layer is a zinc-based or epoxy resin anti-corrosion layer with a thickness of 0.1 to 0.3 mm.

Images