Modularized steel structure and fabricated building

Abstract

The utility model relates to the technical field of building structures, and provides a modular steel structure and a fabricated building, the modular steel structure comprises a plurality of modular unit layers which are sequentially connected in the vertical direction, and each modular unit layer comprises a plurality of modular units; each module unit comprises a plurality of stand columns parallel in pairs, an upper cross beam connected between the upper ends of the adjacent stand columns and a lower cross beam connected between the lower ends of the adjacent stand columns. Upper connecting pieces are welded to the upper ends of the stand columns, lower connecting pieces are welded to the lower ends of the stand columns, and the two ends, in the length direction, of each upper cross beam are detachably connected with the upper connecting pieces welded to the corresponding stand columns through threaded fasteners. The two ends, in the length direction, of each lower cross beam are detachably connected with the lower connecting pieces welded to the corresponding stand columns through threaded fasteners. The modularized steel structure is good in stability and high in construction efficiency.

Description

Technical Field

[0001] This application relates to the field of building structure technology, and more specifically, to a modular steel structure and prefabricated building. Background Technology

[0002] In existing construction methods, steel reinforcement is mainly tied on-site and then poured on-site. This method is inefficient and has a long construction period. To address this, prefabricated buildings based on steel structures have emerged. These buildings use steel columns and beams as the main frame, and then connect prefabricated wall panels and floor slabs to achieve rapid assembly. However, the connection and assembly of steel structures in existing prefabricated building technologies still suffer from low efficiency and poor stability. Utility Model Content

[0003] In view of this, this application provides a modular steel structure to solve the technical problems of low construction efficiency and poor connection stability of steel structure connections in prefabricated buildings in the prior art.

[0004] This application provides a modular steel structure, characterized in that the modular steel structure includes multiple layers of modular unit layers connected sequentially in the vertical direction, each layer of modular unit layers includes multiple modular units, each modular unit includes multiple parallel columns, an upper crossbeam connected between the upper ends of adjacent columns, and a lower crossbeam connected between the lower ends of adjacent columns.

[0005] The upper end of the column is welded with an upper connector, and the lower end of the column is welded with a lower connector. The two ends of each upper crossbeam along its length are detachably connected to the upper connector welded to the corresponding column via threaded fasteners. The two ends of each lower crossbeam along its length are detachably connected to the lower connector welded to the corresponding column via threaded fasteners.

[0006] Furthermore, the module unit includes four columns arranged along a rectangular array.

[0007] Furthermore, each module unit layer includes module units adjacent along a first horizontal direction and module units adjacent along a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. The module units adjacent along the first horizontal direction share two columns. The module units adjacent along the second horizontal direction are detachably connected by two sets of column connection groups. Each set of column connection groups includes two columns detachably connected along the second horizontal direction.

[0008] Furthermore, the column includes a main connecting plate extending vertically, a first connecting vertical plate and a second connecting vertical plate connected to both sides of the main connecting plate along the first horizontal direction, a first connecting horizontal plate connected to the upper end of the main connecting plate vertically, and a second connecting horizontal plate connected to the lower end of the main connecting plate vertically. The two ends of the first connecting horizontal plate are respectively connected to the upper ends of the first connecting vertical plate and the second connecting vertical plate, and the two ends of the second connecting horizontal plate are respectively connected to the lower ends of the first connecting vertical plate and the second connecting vertical plate. The main connecting plate, the first connecting vertical plate, the second connecting vertical plate, the first connecting horizontal plate and the second connecting horizontal plate together enclose an installation groove.

[0009] Furthermore, the multi-layer module unit layer includes vertically adjacent module units. The second connecting horizontal plates of the four columns of the upper module unit are supported one-to-one on the first connecting horizontal plates of the four columns of the lower module unit. The four columns of the upper module unit are detachably connected to the four columns of the lower module unit.

[0010] Further, the upper connecting member includes a horizontally arranged first horizontal plate and a first vertical plate extending vertically upward from the first horizontal plate. The first horizontal plate and the first vertical plate form an L-shape in the cross-section of the upper connecting member perpendicular to its length direction. The lower connecting member includes a horizontally arranged second horizontal plate and a second vertical plate extending vertically downward from the second horizontal plate. The second horizontal plate and the second vertical plate form an L-shape in the cross-section of the lower connecting member perpendicular to its length direction. The upper crossbeam includes a horizontally arranged first horizontal beam plate and a first vertical beam plate extending vertically upward from the first horizontal beam plate. The first horizontal beam plate and the first vertical beam plate form an L-shape in the cross-section of the upper crossbeam perpendicular to its length direction. The lower crossbeam includes a horizontally arranged second horizontal beam plate and a second vertical beam plate extending vertically downward from the second horizontal plate. The second horizontal beam plate and the second vertical beam plate form an L-shape in the cross-section of the lower crossbeam. The beam has an L-shaped cross-section perpendicular to its length. In the interconnected upper crossbeams and upper connectors, a first horizontal beam plate is detachably connected below the corresponding first horizontal plate, and a first vertical beam plate is detachably connected to one side of the corresponding first vertical plate. In the interconnected lower crossbeams and lower connectors, a second horizontal beam plate is detachably connected above the corresponding second horizontal plate, and a second vertical beam plate is detachably connected to one side of the corresponding second vertical plate. The upper connector is welded to the side of the first connecting plate and / or the upper end of the second connecting plate facing away from the mounting groove. The lower connector is welded to the side of the first connecting plate and / or the lower end of the second connecting plate facing away from the mounting groove. The upper connector is welded to the surface of the main connecting plate located within the mounting groove, and the lower connector is welded to the surface of the main connecting plate located within the mounting groove.

[0011] Furthermore, in the interconnected upper crossbeam and upper connector, the first horizontal beam plate is detachably connected to the lower part of the corresponding first horizontal plate by threaded fasteners passing through the first horizontal beam plate and the corresponding first horizontal plate, and the first vertical beam plate is detachably connected to one side of the corresponding first vertical plate by threaded fasteners passing through the first vertical beam plate and the corresponding first vertical plate; in the interconnected lower crossbeam and lower connector, the second horizontal beam plate is detachably connected to the upper part of the corresponding second horizontal plate by threaded fasteners passing through the second horizontal beam plate and the corresponding second horizontal plate, and the second vertical beam plate is detachably connected to one side of the corresponding second vertical plate by threaded fasteners passing through the second vertical beam plate and the corresponding second vertical plate.

[0012] Furthermore, the modular steel structure includes a first precast floor slab and a second precast floor slab. The first precast floor slab is supported and limited between the second horizontal beam slab of the lower crossbeam of the upper module unit and the first horizontal beam slab of the upper crossbeam of the lower module unit in the adjacent modular units. The second precast floor slab is supported on the first horizontal beam slab of the uppermost module unit in the modular steel structure.

[0013] Furthermore, the modular steel structure includes a prefabricated wall panel and a first perforated plate. The lower end of the prefabricated wall panel is supported on the second horizontal beam plate of the lower crossbeam of each module unit. The first perforated plate is detachably connected to the prefabricated wall panel and the second vertical beam plate supporting the lower crossbeam of the prefabricated wall panel by threaded fasteners.

[0014] In addition, this utility model also provides a prefabricated building, wherein the prefabricated building includes the above-mentioned modular steel structure.

[0015] Compared to existing technologies, the modular steel structure provided by this utility model has an upper connector welded to the upper end of the column and a lower connector welded to the lower end. Therefore, the column, the upper connector, and the lower connector form a vertically integrated quick-connect column. The upper beam can be detachably connected to the corresponding upper connector through threaded fasteners between the upper ends of adjacent columns, and the lower beam can be detachably connected to the corresponding lower connector through threaded fasteners between the lower ends of adjacent columns. This allows for quick and easy connection of modular units. Repeating this operation allows for the simple and quick construction of multiple layers of modular units, forming a stable modular steel structure with high construction efficiency and a high degree of safety redundancy.

[0016] Other advantages of this invention will be described in the following detailed embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of a portion of the structure of a modular steel structure according to an embodiment of this application;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0021] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0022] Figure 5 for Figure 1 Enlarged view of point D in the middle;

[0023] Figure 6 This is a partial sectional view of a modular steel structure according to an embodiment of this application;

[0024] Figure 7 This is another partial cross-sectional view of a modular steel structure according to an embodiment of this application;

[0025] Figure 8 This is a partial three-dimensional structural diagram of a modular steel structure according to an embodiment of this application, wherein the prefabricated wall panels, the first prefabricated floor slab, and the second prefabricated floor slab are omitted;

[0026] Figure 9 This is a perspective view of a column with an upper connector and a lower connector welded to it in a modular steel structure according to an embodiment of this application.

[0027] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0028] Figure 11 for Figure 9 Enlarged view of point B in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-First mounting hole; 2-Second mounting hole; 3-First precast floor slab; 4-Second precast floor slab; 5-Precast wall panel; 6-First perforated panel; 7-First fixing member; 8-Second fixing member; 9-Third fixing member; 10-Fourth fixing member; 11-Fifth fixing member; 12-Sixth fixing member; 13-Seventh fixing member; 14-Eighth fixing member; 100-Column; 101-Main connecting plate; 102-First connecting plate; 103 - Second connecting vertical plate; 104- First connecting horizontal plate; 105- Second connecting horizontal plate; 106- Mounting groove; 200- Upper horizontal beam; 201- First horizontal beam plate; 202- First vertical beam plate; 300- Lower horizontal beam; 301- Second horizontal beam plate; 302- Second vertical beam plate; 400- Upper connector; 401- First horizontal plate; 402- First vertical plate; 500- Lower connector; 501- Second horizontal plate; 502- Second vertical plate. Detailed Implementation

[0031] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. One or more embodiments of this application are exemplarily shown in the drawings to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that this application can be implemented in many different forms and is not limited to the embodiments described below.

[0032] In the accompanying drawings of this application, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0034] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0035] See Figures 1 to 11 According to one aspect of the present invention, a modular steel structure is provided, wherein the modular steel structure includes multiple layers of modular unit layers connected sequentially in the vertical direction, each layer of modular unit layers includes multiple modular units, each modular unit includes multiple parallel columns 100, an upper crossbeam 200 connecting the upper ends of adjacent columns 100 and a lower crossbeam 300 connecting the lower ends of adjacent columns 100.

[0036] The upper end of the column 100 is welded with an upper connector 400, and the lower end of the column 100 is welded with a lower connector 500. The two ends of each upper crossbeam 200 along its length are detachably connected to the upper connector 400 welded to the corresponding column 100 by threaded fasteners. The two ends of each lower crossbeam 300 along its length are detachably connected to the lower connector 500 welded to the corresponding column 100 by threaded fasteners. The threaded fasteners mentioned in this application specifically include screws, bolts, and other fasteners, which can be locked with nuts.

[0037] Because the modular steel structure provided by this utility model has an upper connector 400 welded to the upper end of the column 100 and a lower connector 500 welded to the lower end of the column 100, the column 100, the upper connector 400, and the lower connector 500 form a vertically integrated quick-connect column. The upper beam 200 can be detachably connected to the corresponding upper connector 400 between the upper ends of adjacent columns 100 by threaded fasteners, and the lower beam 300 can be detachably connected to the corresponding lower connector 500 between the lower ends of adjacent columns 100 by threaded fasteners. The modular unit can be quickly and conveniently connected by repeating this operation. Multi-layer modular unit layers can be easily and quickly built to form a stable modular steel structure with high construction efficiency and a high degree of safety redundancy.

[0038] According to a specific embodiment of this application, the module unit includes four columns 100 arranged along a rectangular array. The upper crossbeam 200 and lower crossbeam 300 between the columns 100 are connected to quickly form a rectangular frame structure.

[0039] According to a preferred embodiment of this application, each module unit layer includes module units adjacent along a first horizontal direction L1 and module units adjacent along a second horizontal direction L2. The first horizontal direction L1 is perpendicular to the second horizontal direction L2. The module units adjacent along the first horizontal direction L1 share two columns 100 (equivalent to two module units having a shared overlapping part). The modules adjacent along the second horizontal direction L2 are detachably connected by two sets of column 100 connection groups. Each set of column 100 connection groups includes two columns 100 detachably connected along the second horizontal direction L2.

[0040] According to a specific embodiment of this application, the column 100 includes a main connecting plate 101 extending vertically, a first connecting vertical plate 102 and a second connecting vertical plate 103 connected to both sides of the main connecting plate 101 along a first horizontal direction L1, a first connecting horizontal plate 104 connected to the upper end of the main connecting plate 101 vertically, and a second connecting horizontal plate 105 connected to the lower end of the main connecting plate 101 vertically. The two ends of the first connecting horizontal plate 104 are also respectively connected to the first connecting vertical plate 102 and the second connecting vertical plate 103. The upper ends of the connecting uprights 103 are connected, and the two ends of the second connecting horizontal plate 105 are respectively connected to the lower ends of the first connecting uprights 102 and the second connecting uprights 103. The main connecting plate 101, the first connecting uprights 102, the second connecting uprights 103, the first connecting horizontal plate 104, and the second connecting horizontal plate 105 together enclose the mounting groove 106. The mounting groove 106 facilitates the extension and connection of the ends of the upper horizontal beam 200 and the lower horizontal beam 300. Such a column 100 perfectly balances strength and space utilization. The multi-layer modular unit layer includes adjacent modular units. The second connecting horizontal plates 105 of the four columns 100 of the upper modular unit are supported one-to-one on the first connecting horizontal plates 104 of the four columns 100 of the lower modular unit. The four columns 100 of the upper modular unit are detachably connected one-to-one with the four columns 100 of the lower modular unit.

[0041] According to one embodiment of this application, the upper connector 400 includes a horizontally arranged first horizontal plate 401 and a first vertical plate 402 extending vertically upward from the first horizontal plate 401. The first horizontal plate 401 and the first vertical plate 402 form an L-shape in the cross section of the upper connector 400 perpendicular to its length direction (the upper connector 400 may specifically be angle steel or angle iron). The lower connector 500 includes a horizontally arranged second horizontal plate 501 and a second vertical plate 502 extending vertically downward from the second horizontal plate 501. The second horizontal plate 501 and the second vertical plate 502 form an L-shape in the cross section of the lower connector 500 perpendicular to its length direction (the lower connector 500 may specifically be angle steel or angle iron). The upper crossbeam 200 includes a horizontally arranged first horizontal beam plate. The upper crossbeam 200 has an L-shaped cross section perpendicular to its length direction, consisting of a first horizontal beam plate 201 and a first vertical beam plate 202 extending vertically upward from the first horizontal beam plate 201. The lower crossbeam 300 includes a horizontally arranged second horizontal beam plate 301 and a second vertical beam plate 302 extending vertically downward from the second horizontal plate 501. The second horizontal beam plate 301 and the second vertical beam plate 302 form an L-shaped cross section perpendicular to its length direction of the lower crossbeam 300. In the upper crossbeam 200 and the upper connector 400 that are connected to each other, the first horizontal beam plate 201 is detachably connected to the lower part of the corresponding first horizontal plate 401, and the first vertical beam plate 202 is detachably connected to one side of the corresponding first vertical plate 402.In the interconnected lower crossbeam 300 and lower connector 500, the second horizontal beam plate 301 is detachably connected above the corresponding second horizontal plate 501, and the second vertical beam plate 302 is detachably connected to one side of the corresponding second vertical plate 502. In this embodiment, the connection between the upper crossbeam 200 and the upper connector 400, and the connection between the lower crossbeam 300 and the lower connector 500, both involve connections on two L-shaped plates. This connection offers high reliability and stability, improves connection accuracy, and also provides positioning during installation. The upper ends of the first connecting vertical plate 102 and / or the second connecting vertical plate 103 are opposite to each other. The mounting groove 106 has an upper connector 400 welded to its side. Specifically, if the column 100 needs to be connected to the upper beam 200 on both sides along the first horizontal direction L1, then the upper end of the first connecting plate 102 facing away from the side of the mounting groove 106 and the upper end of the second connecting plate 103 facing away from the side of the mounting groove 106 are both welded with the upper connector 400. If one side of the column 100 along the first horizontal direction L1 is a horizontal edge of a modular steel structure and does not need to be connected to the upper beam 200, then the corresponding side of the first connecting plate 102 and the second connecting plate 103 are not welded with the upper connector 400. The lower end of the first connecting plate 102 and / or the lower end of the second connecting plate 103 are welded to the side facing away from the mounting groove 106 with a lower connector 500. Specifically, if the column 100 needs to be connected to the lower crossbeam 300 on both sides along the first horizontal direction L1, then the lower end of the first connecting plate 102 and the lower end of the second connecting plate 103 are welded to the side facing away from the mounting groove 106 with a lower connector 500. If one side of the column 100 along the first horizontal direction L1 is a horizontal edge of a modular steel structure and does not need to be connected to the lower crossbeam 300, then the corresponding side of the first connecting plate 102 and the second connecting plate 103 are not connected to the lower crossbeam 300. A lower connector 500 is welded to the first connecting plate 102 and the second connecting plate 103. The upper connector 400 and lower connector 500 are welded to these plates to connect the upper crossbeam 200 and the lower crossbeam 300 extending along the first horizontal direction L1. Furthermore, the upper end of the main connecting plate 101, located within the mounting groove 106, is welded to the upper connector 400, and the lower end of the main connecting plate 101, located within the mounting groove 106, is welded to the lower connector 500. The upper connector 400 and lower connector 500 welded to the surfaces within the mounting groove 106 are used to connect the upper crossbeam 200 and the lower crossbeam 300 extending along the second horizontal direction L2.

[0042] According to one embodiment of this application, in the interconnected upper crossbeam 200 and upper connector 400, a first horizontal beam plate 201 is detachably connected to the lower part of the corresponding first horizontal plate 401 by threaded fasteners (e.g., bolts) passing through the first horizontal beam plate 201 and the corresponding first horizontal plate 401; a first vertical beam plate 202 is detachably connected to one side of the corresponding first vertical plate 402 by threaded fasteners (e.g., bolts) passing through the first vertical beam plate 202 and the corresponding first vertical plate 402; in the interconnected lower crossbeam 300 and lower connector 500, a second horizontal beam plate 301 is connected to the lower part of the corresponding first horizontal plate 401 by threaded fasteners (e.g., bolts) passing through the first vertical beam plate 202 and the corresponding first vertical plate 402; The second vertical beam 302 is detachably connected to the upper part of the corresponding second horizontal plate 501 via threaded fasteners passing through the second horizontal beam 301 and the corresponding second vertical plate 502. The second vertical beam 302 is detachably connected to one side of the corresponding second vertical plate 502 via threaded fasteners passing through the second vertical beam 302 and the corresponding second vertical plate 502. In the same module unit, the upper connector 400, lower connector 500, upper crossbeam 200, and lower crossbeam 300 form an L-shaped notch facing the interior of the module unit. When there are module units on both sides of the column 100 along the first horizontal direction L1, the column 1... The upper end of the main connecting plate 101 of column 100, located within the mounting groove 106, is welded with two upper connecting parts 400 arranged symmetrically in opposite directions. Each upper connecting part 400 is connected to a corresponding upper crossbeam 200. Threaded fasteners (e.g., bolts) pass through the first vertical plate 402 of one upper connecting part 400, the first vertical beam plate 202 of each of the two upper crossbeams 200, and the first vertical plate 402 of the other upper connecting part 400, and are then tightened with nuts. The lower end of the main connecting plate 101 of column 100, located within the mounting groove 106, is welded with two lower connecting parts 500 arranged symmetrically in opposite directions. The lower connector 500 is connected to a corresponding lower crossbeam 300. Threaded fasteners (e.g., bolts) pass through the second vertical plate 502 of one lower connector 500, the second vertical beam plate 302 of each of the two lower crossbeams 300, and the second vertical plate 502 of the other lower connector 500, and are then locked with nuts. The first horizontal beam plate 201, the first horizontal plate 401, the first vertical beam plate 202, the first vertical plate 402, the second horizontal beam plate 301, the second horizontal plate 501, the second vertical beam plate 302, and the second vertical plate 502 have first mounting holes 1 for threaded fasteners (e.g., bolts) to pass through.

[0043] Furthermore, as mentioned earlier, the module units adjacent along the second horizontal direction L2 are detachably connected by two sets of column 100 connection groups. Each set of column 100 connection groups includes two columns 100 detachably connected along the second horizontal direction L2. Specifically, the main connecting plates 101 of the two connected columns 100 can be abutted against each other, and their respective mounting grooves 106 are opposite to each other. The first connecting plate 102 and the second connecting plate 103 are both provided with second mounting holes 2. Then, the first connecting plates 102 and the second connecting plates 103 of these two columns 100 are connected by the column 100 connecting plates (not shown). One or more threaded fasteners (e.g., bolts) pass through the column 100 connecting plates and one first connecting plate 102, and one or more threaded fasteners (e.g., bolts) pass through the column 100 connecting plates and one first connecting plate 102. A threaded fastener (e.g., a bolt) passes through the connecting plate of column 100 and another first connecting plate 102, and is tightened with a nut, thereby connecting the first connecting plates 102 of the two columns 100 respectively. One or more threaded fasteners (e.g., bolts) pass through the connecting plate of another column 100 and a second connecting plate 103, and one or more threaded fasteners (e.g., bolts) pass through the connecting plate of another column 100 and another second connecting plate 103, and are tightened with a nut, thereby connecting the second connecting plates 103 of the two columns 100 respectively. The upper and lower connected module units can also be connected by a second mounting hole 2 provided at the lower end of the upper column 100 and a second mounting hole 2 provided at the upper end of the lower column 100, in conjunction with the connecting plate and threaded fasteners.

[0044] According to one embodiment of this application, the modular steel structure includes a first precast floor slab 3 and a second precast floor slab 4. The first precast floor slab 3 is supported and limited between the second horizontal beam plate 301 of the lower crossbeam 300 of the upper module unit and the first horizontal beam plate 201 of the upper crossbeam 200 of the lower module unit in the vertically adjacent modular units. The second precast floor slab 4 is supported on the first horizontal beam plate 201 of the upper crossbeam 200 of the uppermost module unit in the modular steel structure. This special L-shaped structure of the upper crossbeam 200 and the lower crossbeam 300 can precisely limit the first precast floor slab 3. In addition, the first vertical beam plate 202 of the upper crossbeam 200 and the second vertical beam of the lower crossbeam 300 can also be used to limit the first precast floor slab 3. The threaded fasteners (e.g., screws or bolts) of plate 302 are inserted into the first precast floor slab 3 and the second precast floor slab 4 for further fixation of the first precast floor slab 3 and the second precast floor slab 4. In particular, the second precast floor slab 4 is supported on the upper crossbeam 200 of the uppermost module unit in the modular steel structure, so it needs to be fixed by inserting threaded fasteners (e.g., screws or bolts). Since the first precast floor slab 3 is already limited between the lower crossbeam 300 and the upper crossbeam 200, it can be chosen not to be fixed by inserting threaded fasteners (e.g., screws or bolts). The side edges of the first precast floor slab 3 and the second precast floor slab 4 can be stopped and limited in the horizontal direction by the first vertical beam plate 202 and the second vertical beam plate 302.

[0045] See Figures 5 to 7 According to one embodiment of this application, the modular steel structure includes a prefabricated wall panel 5 and a first perforated plate 6. The lower end of the prefabricated wall panel 5 is supported on the second horizontal beam plate 301 of the lower crossbeam 300 of each module unit. The first perforated plate 6 is detachably connected to the prefabricated wall panel 5 and the second vertical beam plate 302 of the lower crossbeam 300 supporting the prefabricated wall panel 5 by threaded fasteners (e.g., screws or bolts). In two adjacent module units, the first perforated plate 6 can have five connection holes from top to bottom. The five connection holes are installed sequentially from top to top by a first fixing member 7, a second fixing member 8, a third fixing member 9, and a fourth fixing member. 10. The fifth fixing member 11 (the first fixing member 7, the second fixing member 8, the third fixing member 9, the fourth fixing member 10, and the fifth fixing member 11 can all be screws, pins, bolts, etc.), the first fixing member 7 is also inserted and fixed to the lower end of the precast wall panel 5 of the upper module unit, the second fixing member 8 is also inserted and fixed to the second vertical beam 302 of the lower crossbeam 300 of the upper module unit and the first precast floor slab 3 that limits the lower crossbeam 300 and the upper crossbeam 200 of the lower module unit, the third fixing member 9 is also inserted and fixed to the lower crossbeam 300 of the upper module unit and the upper crossbeam 200 of the lower module unit. The first precast floor slab 3 and the fourth fixing rod 10 are also inserted and fixed to the first vertical beam slab 202 of the upper horizontal beam 200 of the lower module unit and the first precast floor slab 3 and the lower horizontal beam 300 of the upper module unit. The fifth fixing rod 11 is also inserted and fixed to the upper end of the precast wall panel 5 supported by the lower horizontal beam 300 of the lower module unit. In addition, the first perforated plate 6 can also be used on horizontally adjacent module units and vertically adjacent module units. At this time, the first perforated plate 6 can also be connected to the first vertical beam 300 of the adjacent lower horizontal beam 300 of the two horizontally adjacent module units of the upper layer through the sixth fixing rod 12. The two vertical beams 302 are connected to the first vertical beams 202 of the upper beams 200 of the two adjacent horizontally adjacent module units on the lower floor by the seventh fixing member 13 and the eighth fixing member 14. (The sixth fixing member 12, the seventh fixing member 13, and the eighth fixing member 14 can all be screws, pins, screws, etc.). In other positions, such as when the upper end of the precast wall panel 5 corresponds to the uppermost end of the modular steel structure and the lower end of the precast wall panel 5 corresponds to the lowermost end of the modular steel structure, a second perforated plate (not shown) similar to the structure of the first perforated plate 6 can be used for detachable connection.

[0046] According to another aspect of this utility model, a prefabricated building is also provided, wherein the prefabricated building includes the above-mentioned modular steel structure. The modular steel structure serves as the main structure of the prefabricated building, thus the prefabricated building possesses all the advantages of the above-mentioned modular steel structure, which will not be repeated here. The prefabricated building is further equipped with necessary doors, windows, wall facades, and other structures to form a complete building structure with residential and other functional uses.

[0047] It should be noted that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting this application. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this application, such as combining different features in various embodiments, and these should all fall within the protection scope of this application.

Claims

1. A modular steel structure, characterized in that, The modular steel structure includes multiple layers of modular units connected in sequence in the vertical direction. Each layer of modular units includes multiple modular units. Each modular unit includes multiple parallel columns, an upper crossbeam connecting the upper ends of adjacent columns, and a lower crossbeam connecting the lower ends of adjacent columns. The upper end of the column is welded with an upper connector, and the lower end of the column is welded with a lower connector. The two ends of each upper crossbeam along its length are detachably connected to the upper connector welded to the corresponding column via threaded fasteners. The two ends of each lower crossbeam along its length are detachably connected to the lower connector welded to the corresponding column via threaded fasteners.

2. The modular steel structure according to claim 1, characterized in that, The module unit includes four columns arranged in a rectangular array.

3. The modular steel structure according to claim 2, characterized in that, Each module unit layer includes module units adjacent along a first horizontal direction and module units adjacent along a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. The module units adjacent along the first horizontal direction share two columns. The module units adjacent along the second horizontal direction are detachably connected by two sets of column connection groups. Each set of column connection groups includes two columns detachably connected along the second horizontal direction.

4. The modular steel structure according to claim 3, characterized in that, The column includes a main connecting plate extending vertically, a first connecting vertical plate and a second connecting vertical plate connected to both sides of the main connecting plate along the first horizontal direction, a first connecting horizontal plate connected to the upper end of the main connecting plate vertically, and a second connecting horizontal plate connected to the lower end of the main connecting plate vertically. The two ends of the first connecting horizontal plate are respectively connected to the upper ends of the first connecting vertical plate and the second connecting vertical plate, and the two ends of the second connecting horizontal plate are respectively connected to the lower ends of the first connecting vertical plate and the second connecting vertical plate. The main connecting plate, the first connecting vertical plate, the second connecting vertical plate, the first connecting horizontal plate and the second connecting horizontal plate together enclose an installation groove.

5. The modular steel structure according to claim 4, characterized in that, The multi-layer module unit layer includes vertically adjacent module units. The second connecting horizontal plates of the four columns of the upper module unit are supported one-to-one on the first connecting horizontal plates of the four columns of the lower module unit. The four columns of the upper module unit are detachably connected to the four columns of the lower module unit.

6. The modular steel structure according to claim 5, characterized in that, The upper connecting member includes a horizontally arranged first horizontal plate and a first vertical plate extending vertically upward from the first horizontal plate. The first horizontal plate and the first vertical plate form an L-shape in the cross-section of the upper connecting member perpendicular to its length direction. The lower connecting member includes a horizontally arranged second horizontal plate and a second vertical plate extending vertically downward from the second horizontal plate. The second horizontal plate and the second vertical plate form an L-shape in the cross-section of the lower connecting member perpendicular to its length direction. The upper crossbeam includes a horizontally arranged first horizontal beam plate and a first vertical plate extending vertically upward from the first horizontal beam plate. The upper crossbeam has a vertical beam plate, the first horizontal beam plate and the first vertical beam plate forming an L-shaped cross section perpendicular to its length direction. The lower crossbeam includes a horizontally arranged second horizontal beam plate and a second vertical beam plate extending vertically downward from the second horizontal beam plate. The second horizontal beam plate and the second vertical beam plate form an L-shaped cross section perpendicular to its length direction. In the upper crossbeam and the upper connector that are connected to each other, the first horizontal beam plate is detachably connected to the lower part of the corresponding first horizontal beam plate, and the first vertical beam plate is detachably connected to one side of the corresponding first vertical beam plate. In the interconnected lower crossbeams and lower connectors, the second horizontal beam plate is detachably connected above the corresponding second horizontal plate, and the second vertical beam plate is detachably connected to one side of the corresponding second vertical plate. The upper connector is welded to the upper end of the first connecting plate and / or the upper end of the second connecting plate on the side away from the mounting groove. The lower connector is welded to the lower end of the first connecting plate and / or the lower end of the second connecting plate on the side away from the mounting groove. The upper connector is welded to the surface of the upper end of the main connecting plate located within the mounting groove, and the lower connector is welded to the surface of the lower end of the main connecting plate located within the mounting groove.

7. The modular steel structure according to claim 6, characterized in that, In the interconnected upper crossbeam and upper connector, the first horizontal beam plate is detachably connected to the lower part of the corresponding first horizontal plate by threaded fasteners passing through the first horizontal beam plate and the corresponding first horizontal plate, and the first vertical beam plate is detachably connected to one side of the corresponding first vertical plate by threaded fasteners passing through the first vertical beam plate and the corresponding first vertical plate; in the interconnected lower crossbeam and lower connector, the second horizontal beam plate is detachably connected to the upper part of the corresponding second horizontal plate by threaded fasteners passing through the second horizontal beam plate and the corresponding second horizontal plate, and the second vertical beam plate is detachably connected to one side of the corresponding second vertical plate by threaded fasteners passing through the second vertical beam plate and the corresponding second vertical plate.

8. The modular steel structure according to claim 6, characterized in that, The modular steel structure includes a first precast floor slab and a second precast floor slab. The first precast floor slab is supported and limited between the second horizontal beam slab of the lower crossbeam of the upper module unit and the first horizontal beam slab of the upper crossbeam of the lower module unit in the adjacent modular units. The second precast floor slab is supported on the first horizontal beam slab of the uppermost module unit in the modular steel structure.

9. The modular steel structure according to claim 8, characterized in that, The modular steel structure includes prefabricated wall panels and a first perforated plate. The lower end of the prefabricated wall panel is supported on the second horizontal beam plate of the lower crossbeam of each module unit. The first perforated plate is detachably connected to the prefabricated wall panel and the second vertical beam plate supporting the lower crossbeam of the prefabricated wall panel by threaded fasteners.

10. A prefabricated building, characterized in that, The prefabricated building includes the modular steel structure described in any one of claims 1 to 9.

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