Steel structure module building floor slab system

Abstract

The invention relates to the technical field of building structures, in particular to a steel structure module building floor slab system which comprises a steel-wood composite floor slab, an open-web truss and an outer frame. The outer frame comprises a transverse bottom frame beam, a longitudinal bottom frame beam, a transverse top frame beam and a longitudinal top frame beam; a rectangular frame structure is defined by the transverse bottom frame beams and the longitudinal bottom frame beams. A rectangular frame structure opposite to the transverse bottom frame beams and the longitudinal bottom frame beams is defined by the transverse top frame beams and the longitudinal top frame beams. The periphery of the steel-wood composite floor is fixedly connected with the transverse bottom frame beam and the longitudinal bottom frame. And the hollow truss is arranged below the steel-wood composite floor slab and is connected with the steel-wood composite floor slab, the longitudinal bottom frame beam and the longitudinal top frame beam. A building structure which is stable and high in bearing capacity is formed by combining the steel-wood composite floor, the hollow truss and the outer frame.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a steel structure module building floor system. Background Art

[0002] Steel structure modular house is assembled from single steel structure modules. Compared with traditional construction methods, modular building has simple on-site installation and construction operations and fast construction speed. In order to further reduce on-site operations, modular building can complete all decoration works including floor and ceiling in the factory. Each module of steel structure modular house is usually composed of frame beams, frame columns, floor, top plate and wall. The bottom plate is usually set with secondary beams between the bottom frame beams, and then the floor slab is laid on it.

[0003] The floor slab can be in the form of concrete floor slab, composite floor slab, assembled cement fiber board, etc. Concrete floor slab or composite floor slab has high bearing capacity and vibration comfort. However, concrete floor slab and composite floor slab are heavy. Heavier floor slab will produce greater structural response under earthquake action. The amount of steel required for the beam-column system of the module frame is also large. At the same time, the heavy structural weight also leads to higher transportation and installation costs of the module, which is not conducive to the promotion and application of modular structure. When cement fiber board or other lightweight floor slabs are used, the comfort level of the floor slab is poor during use due to its light weight, and pedestrian vibration is obvious.

[0004] The module top plate usually sets secondary beams between the bottom frame beams first, and then installs the ceiling below. There is usually no other connection between the upper and lower modules except the corners. The floor slab is supported entirely by the bottom plate beams. In order to meet the requirements of bearing capacity, rigidity and comfort, the bottom plate beams and floor slabs need a larger cross-sectional height, which affects the use height inside the module. The top plate beam only bears the ceiling load, resulting in a certain amount of material waste. Summary of the invention

[0005] The object of the present invention is to provide a steel structure module building floor system to solve at least one technical problem existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a steel structure module building floor system, including a steel-wood composite floor, a hollow truss and an outer frame; The outer frame includes a transverse bottom frame beam, a longitudinal bottom frame beam, a transverse top frame beam, and a longitudinal top frame beam; The transverse bottom frame beam and the longitudinal bottom frame beam form a rectangular frame structure; The transverse top frame beam and the longitudinal top frame beam form a rectangular frame structure opposite to the transverse bottom frame beam and the longitudinal bottom frame beam; The four sides of the steel-wood composite floor are fixedly connected to the transverse bottom frame beam and the longitudinal bottom frame; The hollow truss is arranged below the steel-wood composite floor and is connected to the steel-wood composite floor, the longitudinal bottom frame beam and the longitudinal top frame beam.

[0007] Furthermore, the open-web truss comprises a bottom plate beam, a top plate beam and a gusset plate; The bottom plate beam and the top plate beam are T-shaped beams, the lower end of the bottom plate beam abuts against the upper end of the top plate beam and is connected through the tie plate; The upper end of the bottom plate beam is fixedly connected to the steel-wood composite floor slab, and the two ends of the bottom plate beam in the axial direction are fixedly connected to the longitudinal bottom frame beam; Both ends of the top plate beam in the axial direction are fixedly connected to the longitudinal top frame beam.

[0008] Furthermore, connection holes are provided at corresponding positions of the bottom plate beam, the top plate beam and the fixing plate, and fasteners pass through the connection holes to fasten and connect the bottom plate beam, the top plate beam and the fixing plate.

[0009] Further, a plurality of the bottom plate beams are arranged on the outer frame in parallel and equidistantly; A plurality of top plate beams are arranged on the outer frame in parallel and at equal distances.

[0010] Furthermore, the steel-wood composite floor comprises an upper panel, a lower panel, foam concrete, wooden short columns and edge-sealing keels; The upper panel and the lower panel are rectangles of the same shape and size and are arranged opposite to each other; The edges of the upper panel and the lower panel are connected and sealed by the edge sealing keel; The wooden short column is fixedly arranged between the upper panel and the lower panel; The foam concrete is poured into a closed area enclosed by the upper panel, the lower panel and the edge sealing keel.

[0011] Furthermore, self-tapping screws are arranged on the upper panel and on the lower panel opposite to each other; The self-tapping screws arranged on the upper panel and the lower panel are respectively inserted into the upper end and the lower end of the wooden short column, thereby fixing the wooden short column.

[0012] Furthermore, the wooden short columns are distributed in an equidistant array.

[0013] Furthermore, the steel-wood composite floor is fixedly connected to the outer frame via a connection node structure.

[0014] Further, it also includes a lower suspended ceiling; The lower ceiling is rectangular, and the four sides are respectively fixedly connected to the transverse top frame beam and the longitudinal top frame beam; The lower suspended ceiling is fixedly arranged at the lower end of the top plate beam.

[0015] Further, the connection node structure includes a first node plate, a second node plate and bolts; A first node plate is fixedly arranged on the outer frame, and a second node plate is fixedly arranged on the lower plate; The relative positions of the first node plate and the second node plate are penetrated and fixedly connected by bolts.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: (1) By combining steel-wood composite floor, hollow truss and external frame, a stable and strong bearing capacity building structure is formed. The module bottom plate beam and top plate beam are connected by the tie plate, which enhances the integrity of the module structure and improves the stiffness of the floor support structure, which can reduce the vibration response of the floor under pedestrian load and improve the comfort of the structure.

[0017] (2) Steel-wood composite floors combine the strength of steel and the lightness of wood, which not only reduces the overall building weight but also reduces material costs. At the same time, the use of foamed concrete further reduces the weight of the floor and provides good thermal insulation performance.

[0018] (3) The design of the hollow truss and steel-wood composite floor enhances the seismic performance of the floor system, enabling it to provide better protection from natural disasters such as earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the plan structure of the upper part of the Vierendeel truss from an upward perspective; Figure 2 It is a schematic diagram of the plan structure of the lower part of the Vierendeel truss from a top-down perspective; Figure 3 This is a schematic diagram of the plan structure from the first perspective before the installation of the Vierendeel truss; Figure 4 This is a schematic diagram of the plan structure from the second perspective before the installation of the Vierendeel truss; Figure 5 This is a schematic diagram of the planar structure from the second perspective after the installation of the hollow truss is completed; Figure 6 This is a partial schematic diagram of the steel-wood composite floor; Figure 7 This is a cross-sectional view of the steel-wood composite floor installed on the outer frame; Figure 8 It is a schematic diagram of the planar structure of the first connection node structure; Fig. 9 is a schematic diagram of the planar structure of the second connection node structure; Fig.10 It is a schematic diagram of the plane structure of the third connection node structure; Fig.11 Schematic diagram of the planar structure of the fourth connection node structure.

[0021] Reference numerals: 1-steel-wood composite floor; 11-upper panel; 12-lower panel; 13-foam concrete; 14-wooden short column; 15-edge banding keel; 16-self-tapping screws; 2-hollow truss; 21-bottom plate beam; 22-top plate beam; 23-attachment plate; 24-lower ceiling; 25-connection hole; 26-fastener; 3-external frame; 31-transverse bottom frame beam; 32-longitudinal bottom frame beam; 33-transverse top frame beam; 34-longitudinal top frame beam; 4-connection node structure; 41-welding point; 42-first node plate; 43-second node plate; 44-bolt; 45-extended plate; 46-longitudinal stiffening rib; 47-transverse stiffening rib. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] It should also be noted that the following specific embodiments or specific implementations are a series of optimized settings listed in the present invention to further explain the specific content of the invention, and these settings can be used in combination or in association with each other.

[0026] The present invention is further explained below in conjunction with specific implementation modes.

[0027] Example 1 like Figure 1-5 As shown, a steel structure module building floor system provided in this embodiment includes a steel-wood composite floor 1, a hollow truss 2 and an outer frame 3; The outer frame 3 includes a transverse bottom frame beam 31, a longitudinal bottom frame beam 32, a transverse top frame beam 33, and a longitudinal top frame beam 34; The transverse bottom frame beam 31 and the longitudinal bottom frame beam 32 form a rectangular frame structure; The transverse top frame beam 33 and the longitudinal top frame beam 34 form a rectangular frame structure opposite to the transverse bottom frame beam 31 and the longitudinal bottom frame beam 32; The steel-wood composite floor 1 is fixedly connected to the transverse bottom frame beam 31 and the longitudinal bottom frame on all sides; The hollow truss 2 is arranged below the steel-wood composite floor 1 and is connected to the steel-wood composite floor 1 , the longitudinal bottom frame beam 32 and the longitudinal top frame beam 34 .

[0028] like Figure 3-5 As shown, as a further implementation of this embodiment, the hollow truss 2 includes a bottom plate beam 21, a top plate beam 22 and a gusset plate 23; The bottom plate beam 21 and the top plate beam 22 are T-shaped beams, and the lower end of the bottom plate beam 21 abuts against the upper end of the top plate beam 22 and is connected via the gusset plate 23; The upper end of the bottom plate beam 21 is fixedly connected to the steel-wood composite floor 1, and the two ends of the bottom plate beam 21 are fixedly connected to the longitudinal bottom frame beam 32; Both ends of the top plate beam 22 in the axial direction are fixedly connected to the longitudinal top frame beam 34 .

[0029] The hollow truss 2 disclosed in the present application is formed by connecting the bottom plate beam 21 and the top plate beam 22 through the tie plate 23. The hollow truss 2 fully utilizes the rigidity of the top plate beam 22 and the bottom plate beam 21, and enhances the integrity of the steel structure module building floor system. Compared with the support structure under the traditional composite floor, the hollow truss 2 structure disclosed in the present application increases the support rigidity under the composite floor and provides a more stable support force.

[0030] like Figure 3 As shown, as a further implementation of this embodiment, it also includes a lower ceiling 24; The lower ceiling 24 is rectangular, and the four sides are fixedly connected to the transverse top frame beam 33 and the longitudinal top frame beam 34 respectively; The lower suspended ceiling 24 is fixedly disposed at the lower end of the top beam 22 .

[0031] like Figure 4-5 As shown, as a further implementation of this embodiment, connecting holes 25 are provided at corresponding positions of the bottom plate beam 21, the top plate beam 22 and the fixing plate 23, and fasteners 26 pass through the connecting holes 25 to fasten the bottom plate beam 21, the top plate beam 22 and the fixing plate 23 together.

[0032] When the hollow truss 2 disclosed in the present application is installed on site, it is only necessary to install the fasteners 26 in the connection holes 25 provided on the bottom plate beam 21, the top plate beam 22 and the gusset plate 23 to achieve the installation of the hollow truss 2, so the on-site construction and installation operation is relatively simple. In addition, the interior decoration project of the modular building floor system can be prefabricated and installed in the factory, and only a small number of holes need to be reserved at the top plate beam 22.

[0033] As a further implementation of this embodiment, a plurality of the bottom plate beams 21 are arranged on the outer frame 3 in parallel and equidistantly; The plurality of top plate beams 22 are arranged on the outer frame 3 in parallel and at equal distances.

[0034] By adopting the above technical solution, the present invention has the following beneficial effects: (1) Compared with the traditional support structure under the composite floor, the hollow truss 2 structure increases the support stiffness, provides a more stable support force for the floor, and also helps to improve the bearing capacity and seismic performance of the floor system.

[0035] (2) The installation process of the hollow truss 2 is simplified. The installation can be achieved by setting fasteners 26 in the connection holes 25 set on the bottom plate beam 21, the top plate beam 22 and the gusset plate 23, which greatly reduces the workload of on-site construction. At the same time, the interior decoration project of the modular building floor system can be prefabricated and installed in the factory, further improving the construction efficiency.

[0036] (3) The modular steel structure building floor system helps to reduce material and production costs through modular design and standardized production. At the same time, the design of the hollow truss 2 structure also optimizes the utilization of materials and reduces unnecessary waste.

[0037] Example 2 like Figure 6-7 As shown, this embodiment provides a specific structure of the steel-wood composite floor 1 in Embodiment 1.

[0038] The steel-wood composite floor 1 comprises an upper panel 11, a lower panel 12, foamed concrete 13, wooden short columns 14 and edge-sealing keels 15; The upper panel 11 and the lower panel 12 are rectangular with the same shape and size and are arranged opposite to each other; The edges of the upper panel 11 and the lower panel 12 are connected and sealed by the edge sealing keel 15; The wooden short column 14 is fixedly disposed between the upper panel 11 and the lower panel 12; The foam concrete 13 is poured into a closed area enclosed by the upper panel 11 , the lower panel 12 , and the edge sealing keel 15 .

[0039] like Figure 6-7 As shown, as a further implementation of this embodiment, self-tapping screws 16 are disposed on the upper panel 11 and the lower panel 12 opposite to each other; The self-tapping screws 16 provided on the upper panel 11 and the lower panel 12 are respectively inserted into the upper end and the lower end of the wooden short column 14 , thereby fixing the wooden short column 14 .

[0040] like Figure 6 As shown, as a further implementation of this embodiment, the wooden short columns 14 are distributed in an equidistant array.

[0041] The steel-wood composite floor 1 disclosed in this embodiment can achieve the floor stiffness, strength and comfort indicators required by the specifications with a smaller structural weight, can reduce the amount of steel and foam concrete 13, reduce the structural weight, reduce the cost of the module structure, and improve the product competitiveness.

[0042] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The steel-wood composite floor 1 achieves good overall structural performance through the organic combination of the upper panel 11, the lower panel 12, the foam concrete 13, the wooden short column 14 and the edge banding keel 15. This design can achieve the floor stiffness, strength and comfort indicators required by the specification with a smaller structural weight, ensuring the safety and stability of the structure.

[0043] (2) Due to the compact and efficient structure of the composite floor, the amount of steel and foam concrete13 can be significantly reduced. This not only reduces the weight of the structure, but also reduces the use of raw materials, thereby reducing the cost of the modular structure and improving the market competitiveness of the product.

[0044] (3) The wooden short columns 14 are fixed between the upper panel 11 and the lower panel 12 by self-tapping screws 16, which simplifies the installation process and improves the construction efficiency. The wooden short columns 14 distributed in an array with equal spacing further ensure the uniformity and stability of the structure, and facilitate construction control and quality control.

[0045] (4) Foam concrete is used as the filling material, which has excellent properties such as light weight, high strength, heat insulation and sound insulation.

[0046] Example 3 like Figure 8-11 As shown, this embodiment provides a connection node structure 4 that fixes the steel-wood composite floor 1 to the outer frame 3 .

[0047] like Figure 8 As shown in FIG. 4 , the first connection node structure 4 disclosed in this embodiment is shown; the outer side of the edge sealing keel 15 is fixedly connected to the outer frame 3 by welding. Figure 8 shown.

[0048] like Fig. 9 As shown, it is a second connection node structure 4 disclosed in this embodiment; a first node plate 42 is fixedly provided on the outer frame 3, and a second node plate 43 is fixedly provided on the lower panel 12; The relative positions of the first node plate 42 and the second node plate 43 are penetrated and fixedly connected by bolts 44, thereby realizing the fixed connection between the steel-wood composite floor 1 and the outer frame 3.

[0049] like Fig.10 As shown, it is the third connection node structure 4 disclosed in this embodiment; the outer frame 3 is provided with an outward extension plate 45, a longitudinal stiffening rib 46 and a transverse stiffening rib 47; The vertical height of the longitudinal stiffening rib 46 is located on the same horizontal plane as the lower panel 12; The transverse stiffening rib 47 is provided with one or more; The widths of the outwardly extending plate 45, the transverse stiffening ribs 47 and the longitudinal stiffening ribs 46 are the same; The longitudinal stiffening rib 46 is connected to the edge sealing keel 15 at a contact point by welding; The contact point between the overhanging plate 45 and the edge sealing keel 15 is connected by welding.

[0050] Welding point 41 Fig.10 shown.

[0051] like Fig.11 As shown, it is the fourth connection node structure 4 disclosed in this embodiment; the outer frame 3 is provided with an outward extension plate 45, a longitudinal stiffening rib 46 and a transverse stiffening rib 47; The vertical height of the longitudinal stiffening rib 46 is located on the same horizontal plane as the lower panel 12; The transverse stiffening rib 47 is provided with one or more; The widths of the outwardly extending plate 45, the transverse stiffening ribs 47 and the longitudinal stiffening ribs 46 are the same; The transverse stiffening rib 47 is provided with a first node plate 42; The upper end of the first node plate 42 abuts against the lower panel 12; A second node plate 43 is fixedly disposed on the lower panel 12; The relative positions of the first node plate 42 and the second node plate 43 are penetrated and fixedly connected by bolts 44 , thereby achieving a fixed connection between the steel-wood composite floor 1 and the outer frame 3 .

[0052] In addition, if Fig. 9 and 11 As shown, in the second and fourth connection node structures 4 , the outer side of the edge sealing keel 15 can be fixedly connected to the outer frame 3 by welding, just like the first connection node structure 4 , so as to further improve the connection stability of the connection node structure 4 .

[0053] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The first connection node structure 4 is connected to the outer frame 3 by welding the outer side of the edge banding keel 15, thereby firmly fixing the steel-wood composite floor 1 to the outer frame 3. This connection method is simple and direct, can withstand large loads, and ensure the stability and safety of the structure.

[0054] (2) The second connection node structure 4 uses a node plate (a first node plate 42 and a second node plate 43) connected by bolts 44, making the connection between the steel-wood composite floor 1 and the outer frame 3 more flexible and detachable. This connection method is convenient for construction and maintenance, and the connection position can be adjusted according to actual conditions, thereby improving the adaptability and variability of the structure.

[0055] (3) The third connection node structure 4 enhances the rigidity and bearing capacity of the outer frame 3 by arranging an overhanging plate 45, longitudinal stiffening ribs 46 and transverse stiffening ribs 47 on the outer frame 3. The welding connection between the longitudinal stiffening ribs 46 and the edge keel 15, and the welding connection between the overhanging plate 45 and the edge keel 15, further improve the strength and stability of the connection. This structure is suitable for occasions requiring higher bearing capacity and stability.

[0056] (4) The fourth connection node structure 4 combines the advantages of the third connection node structure 4, and sets a first node plate 42 on the transverse stiffening rib 47, which is connected to the second node plate 43 on the lower panel 12 by bolts 44. This connection method not only improves the strength and stability of the structure, but also increases the flexibility and detachability of the connection. At the same time, through the use of the node plate, the force on the connection part is more uniform, which prolongs the service life of the structure. In addition, this connection method is also convenient for construction and maintenance, and improves construction efficiency and quality.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steel structure modular building floor system, characterized in that: It includes steel-wood composite floor slabs, open-web trusses and external frames; The outer frame includes a transverse bottom frame beam, a longitudinal bottom frame beam, a transverse top frame beam, and a longitudinal top frame beam; The transverse bottom frame beam and the longitudinal bottom frame beam form a rectangular frame structure; The transverse top frame beam and the longitudinal top frame beam form a rectangular frame structure opposite to the transverse bottom frame beam and the longitudinal bottom frame beam; The four sides of the steel-wood composite floor are fixedly connected to the transverse bottom frame beam and the longitudinal bottom frame; The hollow truss is arranged below the steel-wood composite floor and is connected to the steel-wood composite floor, the longitudinal bottom frame beam and the longitudinal top frame beam.

2. The steel structure modular building floor system according to claim 1, characterized in that: The open-web truss comprises a bottom plate beam, a top plate beam and a gusset plate; The bottom plate beam and the top plate beam are T-shaped beams, the lower end of the bottom plate beam abuts against the upper end of the top plate beam and is connected through the tie plate; The upper end of the bottom plate beam is fixedly connected to the steel-wood composite floor slab, and the two ends of the bottom plate beam in the axial direction are fixedly connected to the longitudinal bottom frame beam; Both ends of the top plate beam in the axial direction are fixedly connected to the longitudinal top frame beam.

3. The steel structure modular building floor system according to claim 2, characterized in that: The bottom plate beam, the top plate beam and the gusset plate are provided with connection holes at corresponding positions, and fasteners pass through the connection holes to fasten the bottom plate beam, the top plate beam and the gusset plate together.

4. The steel structure modular building floor system according to claim 2, characterized in that: A plurality of the bottom plate beams are arranged on the outer frame in parallel and equidistantly; A plurality of top plate beams are arranged on the outer frame in parallel and at equal distances.

5. The steel structure modular building floor system according to claim 1, characterized in that: The steel-wood composite floor comprises an upper panel, a lower panel, foam concrete, wooden short columns and edge-sealing keels; The upper panel and the lower panel are rectangles of the same shape and size and are arranged opposite to each other; The edges of the upper panel and the lower panel are connected and sealed by the edge sealing keel; The wooden short column is fixedly arranged between the upper panel and the lower panel; The foam concrete is poured into a closed area enclosed by the upper panel, the lower panel and the edge sealing keel.

6. The steel structure modular building floor system according to claim 5, characterized in that: Self-tapping screws are arranged opposite to each other on the upper panel and the lower panel; The self-tapping screws arranged on the upper panel and the lower panel are respectively inserted into the upper end and the lower end of the wooden short column, thereby fixing the wooden short column.

7. The steel structure modular building floor system according to claim 5, characterized in that: The wooden short columns are distributed in an array with equal spacing.

8. The steel structure modular building floor system according to claim 2, characterized in that: It also includes the lower suspended ceiling; The lower ceiling is rectangular, and the four sides are respectively fixedly connected to the transverse top frame beam and the longitudinal top frame beam; The lower suspended ceiling is fixedly arranged at the lower end of the top plate beam.

9. The steel structure modular building floor system according to claim 1, characterized in that: The steel-wood composite floor is fixedly connected to the outer frame via a connection node structure.

10. The steel structure modular building floor system according to claim 9, characterized in that: The connection node structure comprises a first node plate, a second node plate and bolts; A first node plate is fixedly arranged on the outer frame, and a second node plate is fixedly arranged on the lower plate; The relative positions of the first node plate and the second node plate are penetrated and fixedly connected by bolts.

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