A concrete modular building

Abstract

The utility model relates to the technical field of modularization building, especially a concrete modularization building, which comprises a steel connecting component and a steel box, an upper column and a lower column are respectively inserted with a steel box through a plurality of protruding ends, the top and bottom of the steel connecting component are respectively inserted into two steel boxes and connected with the two steel boxes and the plurality of protruding ends of the upper column and the lower column, so as to connect the upper column and the lower column into an integrated structure through the steel connecting component and the two steel boxes. The protruding ends of the plurality of longitudinal connecting steel bars of the upper column and the lower column are respectively connected with a steel box, the steel connecting component is connected with the two steel boxes and the plurality of protruding ends, so that the vertical load of the upper column can be directly transmitted to the lower column through the two steel boxes and the steel connecting component, the force received by the upper column is more continuous when transmitted to the lower column, and the anti-seismic performance of the concrete modularization building is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of modular building technology, and in particular to a concrete modular building. Background Technology

[0002] With the continuous improvement of my country's building industrialization, green construction, and intelligent construction levels, modular concrete buildings, as an advanced stage of prefabricated buildings, are rapidly being promoted in residential, school, medical, and office fields due to their advantages such as high standardization, short construction cycle, and low construction pollution. This type of building uses modular units of "structure + decoration + equipment" as basic components. After prefabrication in the factory, these units are transported to the construction site and assembled into a complete building through standardized nodes, significantly improving construction efficiency and project quality control capabilities.

[0003] In modular building systems, frame structures have become one of the most widely used structural systems due to their good adaptability and spatial flexibility.

[0004] Currently, most joint connections in existing modular concrete buildings rely on bolting or welding. Bolted connections require high-precision holes to be pre-drilled during module prefabrication; even minor deformations during transportation can prevent bolts from being inserted smoothly, significantly increasing the difficulty of on-site adjustments. Welded connections, on the other hand, demand extremely high worker skills, and weld quality is greatly affected by human factors. Post-construction inspection also requires specialized flaw detection equipment, which increases construction costs and time. These shortcomings directly lead to poor structural continuity and deformation coordination in the overall building. During natural disasters such as earthquakes, stress concentration is prone to occur at joints, resulting in cracks that affect structural safety, or even module misalignment or complete collapse.

[0005] Therefore, the modular frame structure connection methods currently used in engineering practice are not perfect. In particular, in terms of the node construction between adjacent module units, there are common problems such as insufficient connection stiffness, low construction and assembly efficiency, large errors, and difficulty in ensuring connection quality. This results in poor overall structural continuity and deformation coordination of the building, making it difficult to meet the requirements of high seismic performance and durability. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a modular concrete building that solves the technical problems of low connection stiffness, low construction and assembly efficiency, and large connection errors in existing modular concrete buildings, which lead to low seismic performance and low durability.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] This utility model provides a modular concrete building, which includes an upper module and a lower module stacked vertically. The upper module includes an upper column, and the lower module includes a lower column. It also includes a connection node structure for connecting the upper and lower columns. Multiple longitudinal connecting steel bars are pre-embedded in both the upper and lower columns, each with a protruding end. The protruding ends of the upper and lower columns extend from their opposite ends. The connection node structure includes a steel connecting component and a steel box. Each of the upper and lower columns has a steel box inserted through its multiple protruding ends. The top and bottom of the steel connecting component are respectively inserted into two steel boxes and connected to the two steel boxes and the multiple protruding ends of the upper and lower columns, thus connecting the upper and lower columns into a single structure via the steel connecting component and the two steel boxes.

[0011] Preferably, the steel connection assembly includes a mounting plate, multiple connecting plates, and multiple longitudinal ribs; the mounting plate is horizontally arranged, and the multiple connecting plates are respectively vertically connected to the top and bottom of the mounting plate, with the multiple connecting plates at the top and bottom of the mounting plate corresponding one-to-one. The multiple connecting plates at the top of the mounting plate can be inserted into the steel box on the upper column and fixedly connected to the steel box by bolts, and the multiple connecting plates at the bottom of the mounting plate can be inserted into the steel box on the lower column and fixedly connected to the steel box by bolts; the multiple longitudinal ribs are respectively vertically connected to the top and bottom of the mounting plate, and the multiple longitudinal ribs at the top and bottom of the mounting plate are respectively inserted into two steel boxes, and the multiple protruding ends of the upper column are fixedly screwed to the multiple longitudinal ribs at the top of the mounting plate one-to-one by multiple connecting sleeves, and the multiple protruding ends of the lower column are fixedly screwed to the multiple longitudinal ribs at the bottom of the mounting plate one-to-one by multiple connecting sleeves.

[0012] Preferably, the steel box body includes a box structure and a web; multiple longitudinal connecting steel bars extending from one end of the upper column or the lower column are screwed into the box structure and then screwed into the box structure to fix the box structure to the upper column or the lower column; the web is vertical and fixedly installed in the box structure, two connecting plates are inserted into each box structure, and the web is located between the two connecting plates. The two connecting plates and the web are connected by bolts to fix the steel box body and the steel connecting assembly.

[0013] Preferably, the box structure has an opening perpendicular to the upper column; each box structure can be filled with concrete through its opening to fix the steel box and the steel connecting assembly into a single structure.

[0014] Preferably, each of the connecting plates has a plurality of first anchoring nails on the sidewall away from the web to increase the anchoring force between the connecting plate and the concrete.

[0015] Preferably, the connecting sleeve includes a first sleeve and a second sleeve; the first sleeve and the second sleeve are rotatably connected by a protrusion and a groove, and the first sleeve or the second sleeve is screwed to the protruding end of the longitudinal connecting steel bar extending from the upper column, and the second sleeve or the first sleeve is screwed to the protruding end of the longitudinal connecting steel bar of the lower column, so as to connect the longitudinal connecting steel bars of the upper column and the lower column into an integral structure through the first sleeve and the second sleeve.

[0016] Preferably, a limiting nut is screwed onto the protruding end of each of the longitudinal connecting steel bars to limit the length of the protruding end that passes through the box structure.

[0017] Preferably, the modular concrete building further includes horizontally arranged modular beams, which are fixedly connected to the side wall of the steel box on the lower column; the connection node structure further includes a reinforcing member, which is located inside the modular beam and is vertically connected to the side wall of the steel box.

[0018] Preferably, the reinforcing member includes an anchor plate and a plurality of second anchor bolts; the anchor plate is vertically connected to the side wall of the steel box, and the plurality of second anchor bolts are vertically connected to the opposite side wall of the anchor plate to increase the anchoring force between the anchor plate and the module beam.

[0019] Preferably, there are two upper modules and two lower modules. The two upper modules are arranged horizontally and adjacent to each other, and the two lower modules are arranged horizontally and adjacent to each other, with the two upper modules and the two lower modules arranged vertically in a one-to-one correspondence. The opposite ends of the two adjacent upper columns of the two upper modules and the two adjacent lower columns of the two lower modules are respectively connected to a steel box through their corresponding multiple longitudinal connecting steel bars, and the multiple longitudinal connecting steel bars are inserted into the interior of the steel box. The top and bottom of the steel connecting assembly are respectively inserted into the four steel boxes and connected to the four steel boxes, as well as the multiple longitudinal connecting steel bars of the two upper columns and the two lower columns, so as to connect the two upper columns and the two lower columns into an integral structure through the steel connecting assembly and the four steel boxes.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this utility model are:

[0022] This invention connects the protruding ends of multiple longitudinal connecting steel bars of the upper and lower columns to a steel box, and connects steel connecting assemblies to the two steel boxes and the protruding ends respectively. This allows the upper and lower columns to be connected as a single structure through the two steel boxes and the steel connecting assemblies. This enables the vertical load of the upper column to be directly transferred to the lower column through the two steel boxes and the steel connecting assemblies, making the force transfer from the upper column to the lower column more continuous and significantly improving the stress continuity of the concrete modular building, thereby improving its seismic performance. Furthermore, the rigid connection of the upper and lower columns through the two steel boxes and the steel connecting assemblies avoids the problems of loose joints and insufficient stiffness that are common in traditional bolted or welded connections. This ensures that the upper and lower columns are tightly integrated into a whole through the connecting joint structure, improving the stability of the concrete modular building. Meanwhile, the top and bottom of the steel connection assembly are inserted into two steel boxes respectively, and the extended ends of the longitudinal connecting steel bars of the upper and lower columns are inserted into the two steel boxes respectively and connected to the steel connection assembly respectively. This enables the upper and lower columns to be installed quickly while ensuring a stable connection, greatly reducing the difficulty and time cost of on-site adjustments, and significantly improving the construction and installation efficiency of concrete modular buildings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a first embodiment of the present invention, a modular concrete building.

[0024] Figure 2 This is a schematic diagram of the overall three-dimensional disassembly structure of an embodiment of the present invention, namely a modular concrete building.

[0025] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the steel connection component in an embodiment of a modular concrete building according to the present invention.

[0026] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the steel box body in one embodiment of a modular concrete building according to this utility model.

[0027] Figure 5 This is a front view structural diagram of the steel connection component and the steel box body after connection, according to an embodiment of a modular concrete building of this utility model.

[0028] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at point AA;

[0029] Figure 7 This is a schematic diagram of the overall disassembly structure of the connecting sleeve in one embodiment of a modular concrete building according to this utility model.

[0030] Figure 8 This is a schematic diagram of the overall three-dimensional structure of a second embodiment of the present invention, a modular concrete building.

[0031] Figure 9 This is a schematic diagram of the overall three-dimensional disassembly structure of a second embodiment of the present invention, a modular concrete building.

[0032] Figure 10 This is a schematic diagram of the overall three-dimensional structure of the steel connection component in a second embodiment of the present invention for a modular concrete building.

[0033] [Explanation of Labels in the Attached Image]

[0034] 1: Upper module; 11: Upper column; 2: Lower module; 21: Lower column; 3: Longitudinal connecting reinforcement; 31: Protruding end; 4: Steel connecting assembly; 41: Mounting plate; 42: Connecting plate; 43: Longitudinal reinforcement; 44: First anchor nail; 5: Steel box body; 51: Box structure; 52: Web plate; 6: Bolt; 7: Connecting sleeve; 71: First sleeve; 72: Second sleeve; 73: Protrusion; 74: Groove; 8: Limiting nut; 9: Module beam; 10: Reinforcing member; 101: Anchor plate; 102: Second anchor nail; a: Concrete. Detailed Implementation

[0035] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0036] Example 1

[0037] like Figure 1 As shown, a modular concrete building in this embodiment includes an upper module 1 and a lower module 2 stacked vertically. The upper module 1 includes an upper column 11, and the lower module 2 includes a lower column 21. It also includes a connecting node structure for connecting the upper column 11 and the lower column 21 that are vertically opposite each other.

[0038] Specifically, such as Figure 2As shown, four longitudinal connecting steel bars 3 are pre-embedded in both the upper column 11 and the lower column 21. Each longitudinal connecting steel bar 3 has a protruding end 31, and a total of eight protruding ends on the upper column 11 and the lower column 21 extend from their opposite ends. The connection node structure includes a steel connecting component 4 and a steel box 5. Each of the upper column 11 and the lower column 21 has a steel box 5 inserted through its four protruding ends 31, and all eight protruding ends 31 are inserted into the interior of their corresponding steel box 5. The top and bottom of the steel connecting component 4 are respectively inserted into two steel boxes 5 and connected to the two steel boxes 5 and the eight protruding ends 31 of the upper column 11 and the lower column 21, so as to connect the upper column 11 and the lower column 21 into a whole structure through the steel connecting component 4 and the two steel boxes 5.

[0039] By connecting the protruding ends 31 of multiple longitudinal connecting steel bars 3 of the upper column 11 and the lower column 21 to a steel box 5, and connecting the steel connecting components 4 to the two steel boxes 5 and the eight protruding ends 31 respectively, the upper column 11 and the lower column 21 can be connected into an integrated structure through the two steel boxes 5 and the steel connecting components 4. This allows the vertical load of the upper column 11 to be directly transferred to the lower column 21 through the two steel boxes 5 and the steel connecting components 4, making the force transmission from the upper column 11 to the lower column 21 more continuous. This significantly improves the stress continuity of the concrete modular building, thereby improving its seismic performance. Moreover, by rigidly connecting the upper column 11 and the lower column 21 into an integrated structure through the two steel boxes 5 and the steel connecting components 4, the problems of loose joints and insufficient stiffness that are prone to occur in traditional bolted or welded connections are avoided. This ensures that the upper and lower columns 21 are tightly integrated into a whole through the connection joint structure, improving the stability of the concrete modular building. Meanwhile, the top and bottom of the steel connecting component 4 are respectively inserted into the two steel boxes 5, and the extended ends 31 of the longitudinal connecting steel bars 3 of the upper column 11 and the lower column 21 are respectively inserted into the two steel boxes 5 and connected to the steel connecting component 4. This enables the upper column 11 and the lower column 21 to be quickly installed while ensuring a stable connection, greatly reducing the difficulty and time cost of on-site adjustment, and significantly improving the construction and installation efficiency of concrete modular buildings.

[0040] Furthermore, such as Figure 2 and Figure 3As shown, the steel connection assembly 4 includes a mounting plate 41, four connecting plates 42, and eight longitudinal ribs 43. The mounting plate 41 is horizontally arranged, and the four connecting plates 42 are vertically connected to the top and bottom of the mounting plate 41, respectively. The four connecting plates 42 located at the top and bottom of the mounting plate 41 correspond one-to-one and are aligned along the center line. The two connecting plates 42 located at the top of the mounting plate 41 can be inserted into the steel box 5 on the upper column 11 and are fixedly connected to the steel box 5 by bolts 6. The two connecting plates 42 located at the bottom of the mounting plate 41 can be inserted into the steel box 5 on the lower column 21 and are fixedly connected to the steel box 5 by bolts 6. Eight longitudinal ribs 43 are vertically connected to the top and bottom of the mounting plate 41 respectively. The eight longitudinal ribs 43 located at the top and bottom of the mounting plate 41 are inserted into the two steel boxes 5 respectively. The four protruding ends 31 of the upper column 11 are fixedly screwed to the four longitudinal ribs 43 located at the top of the mounting plate 41 respectively through four connecting sleeves 7. The four protruding ends 31 of the lower column 21 are fixedly screwed to the four longitudinal ribs 43 located at the bottom of the mounting plate 41 respectively through four connecting sleeves 7.

[0041] By setting an mounting plate 41 and four connecting plates 42 and eight longitudinal ribs 43 vertically installed on the top and bottom of the mounting plate 41, and by inserting the four connecting plates 42 into the steel boxes 5 of the upper column 11 and the lower column 21 respectively, and fixing them to the two steel boxes 5 with bolts 6, and by inserting the eight longitudinal ribs 43 into the two steel boxes 5 respectively, and by screwing them to the eight protruding ends 31 of the upper column 11 and the lower column 21 through connecting sleeves 7, the mounting plate 41, the four connecting plates 42 and the eight longitudinal ribs 43 can form a shear support. The longitudinal ribs 43 are screwed to the longitudinal connecting steel bars 3 through the connecting sleeves 7, and the four connecting plates 42 are inserted into the two steel boxes 5 and fixedly connected by bolts 6 to achieve continuous force transmission. This allows the stress at the connection node to be evenly diffused through the synergistic effect of the steel connecting components 4, the steel boxes 5 and the longitudinal connecting steel bars 3, avoiding the stress concentration phenomenon caused by the failure of a single connection method in traditional nodes. Especially in the event of natural disasters such as earthquakes, it can effectively absorb and disperse vibration energy, reduce the generation of cracks at the connection nodes, prevent misalignment or even overall collapse between the upper module 1 and the lower module 2, greatly improve the seismic performance of modular buildings, and further enhance the stability of modular buildings.

[0042] Furthermore, such as Figure 3 As shown, each connecting plate 42 has multiple first anchor nails 44 on its side wall away from the web plate 52 to increase the anchoring force between the connecting plate 42 and the concrete a, thereby increasing the contact area and mechanical interlocking force between the connecting plate 42 and the concrete a poured inside the box structure 51. After the concrete a has solidified, the multiple first anchor nails 44 can be embedded inside the concrete a, effectively improving the connection stability and connection strength between the connecting plate 42 and the concrete a.

[0043] Furthermore, such as Figure 2 , Figures 4-6 As shown, the steel box body 5 includes a box structure 51 and a web 52. Four longitudinal connecting steel bars 3, extending from one end of the upper column 11 or lower column 21, are screwed into the box structure 51 and then pass through it to fix the box structure 51 to the upper column 11 or lower column 21. The web 52 is vertically and fixedly installed inside the box structure 51. Two connecting plates 42 are inserted into each box structure 51, and the web 52 is located between the two connecting plates 42. The two connecting plates 42 and the web 52 are connected by bolts 6 to fix the steel box body 5 and the steel connecting assembly 4 together. The web plate 52 provides a positioning reference for the connecting plate 42, allowing for quick alignment of the two connecting plates 42 during on-site assembly. This means the holes on the web plate 52 align with the holes on the connecting plates 42, reducing the alignment adjustment time when connecting the connecting plates 42 to the steel box 5, minimizing connection quality issues caused by installation position deviations, and making the bolt 6 fixing operation more efficient, further improving the construction and assembly efficiency of the connection node structure. Furthermore, the connection between the web plate 52 and the two connecting plates 42 via bolts 6 securely connects the steel connecting assembly 4 to the steel box 5, increasing their connection strength. Of course, the number of connecting plates 42 can also be 2n to further enhance the connection strength between the connecting plates 42 and the web plate 52.

[0044] Furthermore, such as Figure 2 and Figure 4 As shown, the box structure 51 has an opening perpendicular to the upper column 11. Each box structure 51 can be filled with concrete a through its opening to fix the steel box 5 and the steel connecting assembly 4 into a single structure. The concrete a poured into the box structure 51 tightly encloses the steel box 5 and the steel connecting assembly 4, specifically the connecting plate 42, web 52, multiple longitudinal reinforcements 43, multiple connecting sleeves 7, and the protruding ends 31 of multiple longitudinal connecting steel bars 3, forming a closed connection structure. This effectively prevents external moisture and corrosive media from penetrating the connection joint, reducing the risk of corrosion of the steel components. Simultaneously, the concrete a also restricts the relative deformation of the steel box 5 and the steel connecting assembly 4. When subjected to vibration or impact loads, it can absorb energy through overall deformation, reducing stress concentration at the joint and improving the long-term performance and fatigue resistance of the joint.

[0045] Furthermore, such as Figure 2 and Figure 7As shown, the connecting sleeve 7 includes a first sleeve 71 and a second sleeve 72. The first sleeve 71 and the second sleeve 72 are rotatably connected by a protrusion 73 and a groove 74. The first sleeve 71 or the second sleeve 72 is screwed to the protruding end 31 of the longitudinal connecting steel bar 3 extending from the upper column 11, and the second sleeve 72 or the first sleeve 71 is screwed to the protruding end 31 of the longitudinal connecting steel bar 3 of the lower column 21, so that the longitudinal connecting steel bars 3 of the upper column 11 and the lower column 21 are connected into an integral structure by the first sleeve 71 and the second sleeve 72. By rotatably connecting the first sleeve 71 and the second sleeve 72 by the groove 74 and the protrusion 73, the first sleeve 71 and the second sleeve 72 can be screwed to the protruding end 31 of the longitudinal connecting steel bar 3 and the longitudinal rib 43 respectively, so that the opposite ends of the longitudinal connecting steel bar 3 and the longitudinal rib 43 abut against each other, so that the interior of the connecting sleeve 7 no longer has a cavity, thereby improving the connection strength between the longitudinal connecting steel bar 3 and the longitudinal rib 43. Moreover, it makes connection easier and improves construction efficiency.

[0046] Furthermore, such as Figure 2 As shown, a limiting nut 8 is screwed onto the protruding end 31 of each longitudinal connecting steel bar 3 to limit the length of the protruding end 31 inside the box structure 51. This ensures that the opposite ends of the longitudinal connecting steel bar 3 after it enters the steel box 5 and is screwed onto the longitudinal bar 43 through the connecting sleeve 7 can abut against each other. This ensures the strength and stability of the connection between the longitudinal connecting steel bar 3 and the longitudinal bar 43 through the connecting sleeve 7, and avoids deviation in the connection between the longitudinal bar 43 and the longitudinal connecting steel bar 3 due to the longitudinal connecting steel bar 3 being too long or too short inside the steel box 5. This improves the connection quality and accuracy of the connection node structure.

[0047] Furthermore, such as Figure 1 and Figure 2 As shown, the modular concrete building also includes horizontally arranged modular beams 9, which are fixedly connected to the side walls of the steel box 5 on the lower column 21. The connection node structure also includes a reinforcing member 10, which is located inside the modular beam 9 and vertically connected to the side walls of the steel box 5. The reinforcing member 10 enables the load to be distributed and transferred to the steel box 5 when the modular beam 9 is subjected to vertical or horizontal loads, reducing the risk of deformation or damage at the connection between the modular beam 9 and the steel box 5 due to excessive stress, improving the stress continuity of the connection node structure, and thus making the modular building more stable.

[0048] Furthermore, such as Figure 2As shown, the reinforcing member 10 includes an anchor plate 101 and a plurality of second anchor bolts 102. The anchor plate 101 is vertically and perpendicularly connected to the side wall of the steel box 5. It enables the vertical or horizontal loads received by the modular beam 9 to be distributed and transferred to the steel box 5 through the anchor plate 101, avoiding stress concentration at the connection between the modular beam 9 and the steel box 5, thus preventing deformation or damage and improving the stress continuity of the connection node structure. Multiple second anchor bolts 102 are vertically connected to the opposite sidewalls of the anchor plate 101 to increase the anchoring force between the anchor plate 101 and the module beam 9, thereby strengthening the connection strength between the module beam 9 and the steel box 5. This allows the multiple second anchor bolts 102 to be embedded inside the module beam 9 to form a multi-directional mechanical engagement, improving the adhesion and pull-out resistance between the anchor plate 101 and the module beam 9. This avoids the problem of peeling from the beam that is prone to occur with traditional single-plate reinforcement 10, ensuring that the load on the module beam 9 can be efficiently transferred to the steel box 5 through the anchor plate 101, further strengthening the integrity of the connection between the steel box 5 and the module beam 9.

[0049] It should be noted that in this embodiment, the connecting plate 42, mounting plate 41, longitudinal rib 43, limiting nut 8, bolt 6, connecting sleeve 7, box structure 51, web plate 52, and reinforcing member 10 are all made of steel to improve the rigidity and connection strength of the connection node structure.

[0050] Based on the above structure, the installation principle of a modular concrete building in this embodiment is as follows:

[0051] In this embodiment, the steel connecting assembly 4, the steel box 5, and the reinforcing member 10 are all prefabricated products that can be used immediately. Furthermore, in this embodiment, the longitudinal connecting steel bars 3 embedded in the upper column 11 and the lower column 21 extend out of the ends of the upper column 11 and the lower column 21 during the pouring process.

[0052] In this embodiment, only one upper column 11 and one lower column 21 of the upper module 1 and the lower module 2 are installed. The other upper columns 11 and lower columns 21 of the upper module 1 and the lower module 2 are installed according to the following installation principle.

[0053] like Figures 1-7As shown, when connecting the upper column 11 and the lower column 21, firstly, multiple limiting nuts 8 are screwed one-to-one onto the protruding ends 31 of the longitudinal connecting steel bars 3 extending from the upper column 11 and the lower column 21, respectively. Furthermore, according to the on-site calculation requirements, the limiting nuts 8 are screwed to a preset position close to the corresponding end of the upper column 11 or lower column 21. Then, a steel box 5 is placed above the lower column 21, ensuring that the holes at the bottom of the box structure 51 for the longitudinal connecting steel bars 3 of the lower column 21 align one-to-one with the protruding ends 31 of the pre-embedded longitudinal connecting steel bars 3 in the lower column 21. The steel box 5 is then placed on top of the lower column 21, allowing multiple longitudinal connecting steel bars 3 to be inserted into the steel box 5. At this point, due to gravity, the limiting nuts 8 on the longitudinal connecting steel bars 3 of the lower column 21 are in contact with the bottom wall of the box structure 51. Then, the first sleeve 71 or the second sleeve 72 is screwed onto the protruding ends 31 of the longitudinal connecting steel bars 3 of the lower column 21. Then, the bottom end of the steel connecting assembly 4 is inserted into the steel box 5, that is, the multiple longitudinal ribs 43 at the bottom of the mounting plate 41 are inserted one-to-one into the holes at the top of the box structure 51, so that the multiple longitudinal ribs 43 at the bottom of the mounting plate 41 are aligned with the axis of the protruding ends 31 of the multiple longitudinal connecting steel bars 3 of the lower column 21. The second sleeve 72 or the first sleeve 71 is screwed to one end of the longitudinal ribs 43 inserted into the box structure 51. Simultaneously, the two connecting plates 42 at the bottom of the mounting plate 41 are also inserted into the box structure 51, so that the web 52 is located between the two connecting plates 42, and the opposite sidewalls of the two connecting plates 42 are in contact with the two sidewalls of the web 52. The multiple first sleeves 71 and the multiple second sleeves 72 are rotated respectively, so that each longitudinal connecting steel bar 3 and longitudinal rib 43 fills the internal cavity of its corresponding connecting sleeve 7 until the bolt holes on the two connecting plates 42 are aligned with the bolt holes on the web 52. Finally, the two connecting plates 42 and the web 52 are connected and fixed using multiple bolts 6. At this point, the lower column 21 is connected and fixed to the steel box 5 and the steel connecting assembly 4. After the lower column 21 is connected, the top of the steel connecting assembly 4 is inserted into the steel box 5 connected to the upper column 11. That is, the multiple longitudinal ribs 43 and the two connecting plates 42 on the top of the mounting plate 41 are inserted into the upper steel box 5. The first sleeve 71 or the second sleeve 72 is screwed to the end of the longitudinal rib 43 inserted into the box structure 51. At this time, due to the effect of gravity, the bottom wall of the box structure 51 connected to the upper column 11 fits against the top wall of the mounting plate 41, and the bolt holes on the two connecting plates 42 are aligned with the bolt holes on the web plate 52. Then, the web plate 52 and the two connecting plates 42 are connected by bolts 6, so that the web plate 52 and the two connecting plates 42 form an integral structure. The upper column 11 with the screw-on limiting nut 8 is placed above the steel box 5 and lowered, so that the multiple longitudinal connecting steel bars 3 extending from the bottom of the upper column 11 are inserted into the box structure 51, at which time the limiting nut 8 is in contact with the box structure 51.Then, the second sleeve 72 or the first sleeve 71 is screwed to the end of the longitudinal connecting steel bar 3 inserted into the box structure 51, and the first sleeve 71 and the second sleeve 72 are continuously rotated so that the longitudinal connecting steel bar 3 and the longitudinal reinforcement 43 fill the internal cavity of the connecting sleeve 7. After the longitudinal connecting steel bar 3 and the longitudinal reinforcement 43 fill the internal cavity of the connecting sleeve 7, concrete a is poured into the openings of the two box structures 51 so that the concrete a fills the box structure 51 and forms a flat plane. Furthermore, if there is a gap between the upper column 11 and its corresponding box structure 51, or between the lower column 21 and its corresponding box structure 51, grout can be directly poured into the gap to form an integral structure of the upper column 11 and the lower column 21. Finally, the external stirrups of the reinforcing member 10 are reinforced, the formwork is erected, and the concrete is poured to form the modular beam 9. This completes the node connection between the upper column 11 and the lower column 21.

[0054] Example 2

[0055] Unlike Example 1, as Figure 8 and Figure 9 As shown, in this embodiment, there are two upper modules 1 and two lower modules 2. The two upper modules 1 are arranged horizontally and adjacent to each other, and the two lower modules 2 are arranged horizontally and adjacent to each other. The two upper modules 1 and the two lower modules 2 are arranged vertically in a one-to-one correspondence. The opposite ends of the two adjacent upper columns 11 of the two upper modules 1 and the two adjacent lower columns 21 of the two lower modules 2 are respectively connected to a steel box 5 by their corresponding multiple longitudinal connecting steel bars 3. The multiple longitudinal connecting steel bars 3 are all inserted inside the steel box 5. The top and bottom of the steel connecting assembly 4 are respectively inserted into the four steel boxes 5, and are respectively connected to the four steel boxes 5, as well as the multiple longitudinal connecting steel bars 3 of the two upper columns 11 and the two lower columns 21, so as to connect the two upper columns 11 and the two lower columns 21 into a whole structure through the steel connecting assembly 4 and the four steel boxes 5.

[0056] And, as Figure 10 As shown, the steel connection assembly 4 includes a mounting plate 41, two sets of connecting plates 42 and two sets of longitudinal ribs 43 fixedly connected to its top, and two sets of connecting plates 42 and two sets of longitudinal ribs 43 fixedly installed at its bottom. Each set of connecting plates 42 has two connecting plates 42 for corresponding connection to its web plate 52. Each set of longitudinal ribs 43 has four longitudinal ribs 43 for corresponding to its four corresponding longitudinal ribs 43, and they are connected by connecting sleeves 7.

[0057] In this embodiment, during connection, as follows: Figure 8 and Figure 9As shown, two lower columns 21 are each connected to a steel box 5. Two sets of connecting reinforcing bars and two sets of longitudinal reinforcing bars 43 at the bottom of the mounting plate 41 are simultaneously inserted into the two box structures 51 connected to the lower columns 21. The corresponding longitudinal reinforcing bars 43 and the longitudinal connecting reinforcing bars 3 of the lower columns 21 are connected by connecting sleeves 7. The corresponding two connecting plates 42 and web plates 52 are connected by bolts 6. At this point, the connection between the lower columns 21 and the two steel boxes 5 and the steel connecting assembly 4 is completed. Then, the steel boxes 5 connected to the upper columns 11 are connected one by one to the steel connecting assembly 4. After the connection is completed, the longitudinal connecting reinforcing bars 3 of the two upper columns 11 are inserted into the box structure 51 and connected one-to-one with the longitudinal reinforcing bars 43 at the top of the mounting plate 41 through connecting sleeves 7. Then, concrete a is poured into the openings of the four box structures 51, and two modular beams 9 are formed by external stirrups, formwork, grouting, etc., on the opposite sidewalls of the two reinforcing members 10 connected to the lower columns 21. This completes the node connection between the two upper module 1 and the two lower module 2.

[0058] It should be noted that the connection between the steel connecting component 4 and the four steel boxes 5 in this embodiment is the same as the connection between the steel connecting component 4 and the two steel boxes 5 in Embodiment 1, as well as the connection between the lower column 21 and the upper column 11 and their corresponding steel boxes 5. Therefore, it will not be described again here.

[0059] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0061] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A modular concrete building, comprising an upper module (1) and a lower module (2) stacked vertically, wherein the upper module (1) includes an upper column (11) and the lower module (2) includes a lower column (21), characterized in that, It also includes a connection node structure for connecting the upper column (11) and the lower column (21) that are opposite to each other; Multiple longitudinal connecting steel bars (3) are pre-embedded in both the upper column (11) and the lower column (21). Each longitudinal connecting steel bar (3) is provided with a protruding end (31). The protruding ends (31) on the upper column (11) and the lower column (21) extend from their opposite ends. The connection node structure includes a steel connection assembly (4) and a steel box (5). The upper column (11) and the lower column (21) are each inserted into a steel box (5) through a plurality of protruding ends (31). The top and bottom of the steel connection assembly (4) are respectively inserted into the two steel boxes (5) and connected to the two steel boxes (5) and the plurality of protruding ends (31) of the upper column (11) and the lower column (21) to connect the upper column (11) and the lower column (21) into an integral structure through the steel connection assembly (4) and the two steel boxes (5).

2. The modular concrete building as described in claim 1, characterized in that: The steel connection assembly (4) includes a mounting plate (41), multiple connection plates (42), and multiple longitudinal ribs (43); The mounting plate (41) is horizontally arranged, and multiple connecting plates (42) are vertically connected to the top and bottom of the mounting plate (41) respectively. The multiple connecting plates (42) located at the top and bottom of the mounting plate (41) correspond one-to-one. The multiple connecting plates (42) located at the top of the mounting plate (41) can be inserted into the steel box (5) on the upper column (11) and fixedly connected to the steel box (5) by bolts (6). The multiple connecting plates (42) located at the bottom of the mounting plate (41) can be inserted into the steel box (5) on the lower column (21) and fixedly connected to the steel box (5) by bolts (6). Multiple longitudinal ribs (43) are vertically connected to the top and bottom of the mounting plate (41). Multiple longitudinal ribs (43) located at the top and bottom of the mounting plate (41) are inserted into the two steel boxes (5). Multiple protruding ends (31) of the upper column (11) are fixedly screwed to the multiple longitudinal ribs (43) located at the top of the mounting plate (41) through multiple connecting sleeves (7). Multiple protruding ends (31) of the lower column (21) are fixedly screwed to the multiple longitudinal ribs (43) located at the bottom of the mounting plate (41) through multiple connecting sleeves (7).

3. The modular concrete building as described in claim 2, characterized in that: The steel box body (5) includes a box structure (51) and a web (52); Multiple longitudinal connecting steel bars (3) extending from one end of the upper column (11) or the lower column (21) are screwed to the box structure (51) and then inserted into the box structure (51) to fix the box structure (51) to the upper column (11) or the lower column (21). The web plate (52) is vertically and fixedly installed inside the box structure (51). Two connecting plates (42) are inserted into each box structure (51), and the web plate (52) is located between the two connecting plates (42). The two connecting plates (42) and the web plate (52) are connected by the bolts (6) to fix the steel box (5) and the steel connecting assembly (4).

4. The modular concrete building as described in claim 3, characterized in that: The box structure (51) has an opening in a direction perpendicular to the upper column (11); Each of the box structures (51) can be filled with concrete (a) from its opening to fix the steel box (5) and the steel connecting assembly (4) into a single structure.

5. The modular concrete building as described in claim 4, characterized in that: Each of the connecting plates (42) has a plurality of first anchor nails (44) on its sidewall away from the web plate (52) to increase the anchoring force between the connecting plate (42) and the concrete (a).

6. The modular concrete building as described in claim 3, characterized in that: The connecting sleeve (7) includes a first sleeve (71) and a second sleeve (72); The first sleeve (71) and the second sleeve (72) are rotatably connected by a protrusion (73) and a groove (74), and the first sleeve (71) or the second sleeve (72) is screwed to the protruding end (31) of the longitudinal connecting steel bar (3) extending from the upper column (11), and the second sleeve (72) or the first sleeve (71) is screwed to the protruding end (31) of the longitudinal connecting steel bar (3) of the lower column (21), so as to connect the longitudinal connecting steel bars (3) of the upper column (11) and the lower column (21) into an integral structure through the first sleeve (71) and the second sleeve (72).

7. The modular concrete building as described in claim 3, characterized in that: A limiting nut (8) is screwed onto the protruding end (31) of each of the longitudinal connecting steel bars (3) to limit the length of the protruding end (31) passing through the box structure (51).

8. The modular concrete building as described in claim 1, characterized in that: The concrete modular building also includes horizontally arranged modular beams (9), which are fixedly connected to the side wall of the steel box (5) on the lower column (21); The connection node structure also includes a reinforcing member (10), which is located inside the module beam (9) and is vertically connected to the side wall of the steel box (5).

9. The modular concrete building as described in claim 8, characterized in that: The reinforcing member (10) includes an anchor plate (101) and a plurality of second anchor bolts (102); The anchor plate (101) is vertically connected to the side wall of the steel box (5), and a plurality of second anchor nails (102) are vertically connected to the opposite side wall of the anchor plate (101) to increase the anchoring force between the anchor plate (101) and the module beam (9).

10. The modular concrete building as described in claim 1, characterized in that: The upper module (1) and the lower module (2) are provided in twos. The two upper modules (1) are arranged horizontally and adjacent to each other, and the two lower modules (2) are arranged horizontally and adjacent to each other. The two upper modules (1) and the two lower modules (2) are arranged vertically in a one-to-one correspondence. The opposite ends of the two adjacent upper columns (11) of the two upper modules (1) and the two adjacent lower columns (21) of the two lower modules (2) are respectively connected to a steel box (5) by a plurality of longitudinal connecting steel bars (3), and the plurality of longitudinal connecting steel bars (3) are inserted inside the steel box (5). The top and bottom of the steel connecting assembly (4) are respectively inserted into the four steel boxes (5) and connected to the four steel boxes (5), as well as the plurality of longitudinal connecting steel bars (3) of the two upper columns (11) and the two lower columns (21), so as to connect the two upper columns (11) and the two lower columns (21) into an integral structure through the steel connecting assembly (4) and the four steel boxes (5).

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