Steel structure connection reinforcer, steel structure installation assembly and house storey-adding steel structure module

Abstract

The utility model relates to the technical field of steel structure buildings, in particular to a steel structure connection reinforcing piece, a steel structure piece installation assembly and a house storey-adding steel structure module. The steel structure connection reinforcer comprises reinforcing steel plates arranged on the four sides of the connecting portion of the upper end of a lower stand column and the lower end of an upper stand column and reinforcing assemblies arranged on the longitudinal four edges of the connecting portion of the upper end of the lower stand column and the lower end of the upper stand column. Wherein the reinforcing assembly is an L-shaped corner fitting, and two steel angle beads of the reinforcing assembly can be connected with the two adjacent reinforcing steel plates correspondingly; a reinforcing connecting strip is further arranged between the connected steel angle beads on the two sides of any reinforcing steel plate; the upper end and the lower end of any steel angle bead are provided with a first fixing hole for the first fixing bolt to penetrate through and a second fixing hole for the second fixing bolt to penetrate through respectively. The connecting point of the lower stand column and the upper stand column can be prevented from being impacted by the outside, the stability between the lower stand column and the upper stand column is enhanced, and position deviation caused by stress of the lower stand column and the upper stand column is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel structure building technical field, concretely is steel structure connecting reinforcing part, steel structural member installation subassembly and house layering steel structure module. BACKGROUND

[0002] At present, people's requirements for house structure are higher and higher in limited space, and develop towards miniaturization, diversification and functionalization. People will increase the interlayer to expand the house use area according to their own needs, especially the loft apartment and the original layer height of the street shop is higher. Steel structural member installation subassembly needs to be used when the interlayer of the house is transformed.

[0003] At present, there are two kinds of construction schemes when carrying out house (interlayer) layering, one is through wall body planting reinforcement and then pouring interlayer floor slab, and the other is through steel structure to build interlayer. When the interlayer is built through the steel structure, the stability and firmness of the interlayer need to be considered, but at present, few construction parties will reinforce the steel structure connecting part in indoor interlayer construction, generally only the vertical beam and the cross beam are welded, and there is no other further reinforcing means. Although welding is a common means in steel structure construction, it has high requirements for welding technology, and stress concentration is easy to form at the welding point, fatigue fracture problem is easy to appear under the influence of long-term walking vibration of personnel, and the loft apartment and the street shop generally have small plane space, so welding will also produce sparks and increase the fire risk. In addition, the current part of the structure cannot effectively reinforce and connect the two longitudinal connecting structure columns, although CN107503440B gives a kind of assembled steel structure connecting mode, but it cannot be better applied in the scene of bearing column, but is more suitable for the reinforcement and connection of I-shaped steel. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the utility model provides the following scheme:

[0005] Steel structure connecting reinforcement , including the reinforcing steel plate for being arranged at the four sides of the connecting part of the upper end of the lower column and the lower end of the upper column, the reinforcing assembly for being arranged at the longitudinal four edges of the connecting part of the upper end of the lower column and the lower end of the upper column;

[0006] Among them, the reinforcing assembly is L-shaped corner piece, and the two steel angle strips of the reinforcing assembly can be connected with two adjacent reinforcing steel plates respectively,

[0007] The side surface of the upper column is provided with a positioning column for limiting the reinforcing steel plate, and the positioning column is used for limiting the reinforcing steel plate to move along the plane in any plane of the upper column;The steel angle strip at the two sides of any reinforcing steel plate is also provided with a reinforcing connecting strip;The upper and lower ends of any steel angle strip are respectively provided with a first fixing hole for penetrating a first fixing bolt and a second fixing hole for penetrating a second fixing bolt.

[0008] In some modes, the side end of the steel angle strip is provided with a clamping groove, and the reinforcing connecting strip is provided with a clamping joint at two ends, and the two clamping joints are respectively embedded in the clamping grooves of two adjacent steel angle strips.

[0009] Steel structure mounting assembly The steel structure connecting reinforcing piece is used for reinforcing and connecting the upper column and the lower column, and the upper column and the lower column are provided with reinforcing steel plates on four sides of the connecting end.

[0010] The two steel angle strips of any reinforcing assembly are respectively connected with two groups of reinforcing steel plates on two adjacent sides, at least one group of fixing bolts one and at least one group of fixing bolts two are installed on the steel angle strip, the fixing bolts one are used for connecting and locking the upper column and the reinforcing steel plate, and the fixing bolts two are used for connecting and locking the lower column and the reinforcing steel plate.

[0011] In some modes, the side surface of the lower end of the upper column is provided with a positioning column, and the reinforcing steel plate is provided with a positioning hole matched with the positioning column.

[0012] In some modes, a reinforcing connecting strip is arranged between the two groups of steel angle strips connected with the same reinforcing steel plate, and the reinforcing connecting strip is provided with a clamping joint at two ends, and the two clamping joints are respectively clamped with the two groups of steel angle strips.

[0013] In some modes, the clamping joints at two ends of the reinforcing connecting strip are clamped with the clamping grooves of the steel angle strips, and a glue layer is arranged between the clamping joints of the reinforcing connecting strip and the clamping grooves.

[0014] In some modes, a filling strip is installed on the inner side of the corner part of the steel angle strip, and the filling strip is used for abutting the side edges of the two groups of reinforcing steel plates.

[0015] In some modes, a plurality of groups of fixing bolts one in the same group of reinforcing assemblies are respectively threadedly connected with two adjacent surfaces of the upper column, and a plurality of groups of fixing bolts two in the same group of reinforcing assemblies are respectively threadedly connected with two adjacent surfaces of the lower column.

[0016] In some modes, the reinforcing steel plate is connected with a supporting connecting plate, and the two groups of supporting connecting plates of any reinforcing steel plate are used for fixedly mounting a steel beam.

[0017] House additional layer steel structure module The steel structure mounting assembly comprises a lower column, an upper column and a steel beam mounted at the connecting part of the lower column and the upper column.

[0018] The lower column, the upper column and the steel beam are connected through any steel structure mounting assembly, and the end of the steel beam is connected with a reinforcing steel plate.

[0019] Compared with the prior art, the steel structure mounting assembly has the advantages that:

[0020] 1, the fixing bolt one is used for stably fixing the steel angle strip, the reinforcing steel plate and the upper stand column together, the fixing bolt two is used for stably fixing the steel angle strip, the reinforcing steel plate and the lower stand column together, thereby the connection between the steel structures is stable, and the four groups of reinforcing steel plates are respectively located at the periphery of the lower stand column and the upper stand column, the connecting point between the lower stand column and the upper stand column is wrapped, the connecting point between the lower stand column and the upper stand column can be avoided from being impacted by the outside, and the stability between the lower stand column and the upper stand column is reinforced, and the position deviation of the lower stand column and the upper stand column under stress is avoided.

[0021] 2, the steel angle strip and the adjacent two groups of reinforcing steel plates can be filled by the filling strip, the gap between the steel angle strip and the adjacent two groups of reinforcing steel plates is avoided, and the stability between the steel structures is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A schematic diagram of one form of housing storey steel structure module assembly structure;

[0023] Figure 2 A partial structure exploded view of the steel structure part installation assembly (part of the reinforcing assembly is a partial section view);

[0024] Figure 3 A reinforcing connecting strip structure schematic diagram;

[0025] Figure 4 A reinforcing assembly structure schematic diagram.

[0026] In the drawings:

[0027] 1, the lower stand column; 2, the upper stand column; 3, the reinforcing steel plate; 4, the reinforcing assembly; 401, the steel angle strip; 402, the fixing bolt one; 403, the fixing bolt two; 404, the limiting block; 5, the positioning column; 6, the positioning hole; 7, the reinforcing connecting strip; 8, the clamping groove; 9, the filling strip; 10, the support connecting plate; 11, the steel beam. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0029] The first aspect relates to a steel structure connecting reinforcing piece, comprising reinforcing steel plates 3 for being arranged on four sides of a connecting part between an upper end of a lower stand column 1 and a lower end of an upper stand column 2, and a reinforcing assembly 4 for being arranged on four longitudinal edges of the connecting part between the upper end of the lower stand column 1 and the lower end of the upper stand column 2.

[0030] Wherein, the reinforcing assembly 4 is an L-shaped corner piece, and two steel angle strips 401 of the reinforcing assembly 4 can be connected with two adjacent reinforcing steel plates 3 respectively, the side surface of the upper column 2 is provided with a positioning column 5 for limiting the reinforcing steel plate 3, the positioning column 5 is used for limiting the reinforcing steel plate 3 from moving along the plane of the upper column 2 in any plane; a reinforcing connecting strip 7 is further arranged between the two steel angle strips 401 on the two sides of any reinforcing steel plate 3; and the upper and lower ends of any steel angle strip 401 are respectively provided with a first fixing hole for penetrating a first fixing bolt 402 and a second fixing hole for penetrating a second fixing bolt 403.

[0031] In terms of the steel structure connecting reinforcing piece, part of the assembly can also adopt the following features: the side end of the steel angle strip 401 is provided with a clamping groove 8, and the two ends of the reinforcing connecting strip 7 are provided with clamping joints, and the two clamping joints are respectively embedded in the clamping grooves 8 of the two adjacent steel angle strips 401.

[0032] The second aspect relates to a steel structure mounting assembly, which comprises the aforementioned steel structure connecting reinforcing piece, the steel structure connecting reinforcing piece is used for reinforcing and connecting the upper column 2 with the top of the lower column 1, and the upper column 2 and the lower column 1 are provided with reinforcing steel plates 3 on the four sides of the joint end.

[0033] The two steel angle strips 401 of any reinforcing assembly 4 are connected with two groups of reinforcing steel plates 3 on two adjacent sides respectively, at least one group of first fixing bolts 402 and at least one group of second fixing bolts 403 are mounted on the steel angle strip 401, the first fixing bolt 402 is used for connecting and locking the upper column 2 with the reinforcing steel plate 3, and the second fixing bolt 403 is used for connecting and locking the lower column 1 with the reinforcing steel plate 3. The locking of the bolt can adopt the prior art, such as setting a thread in the mounting hole or setting a nut inside.

[0034] Generally, the four-side structure of the steel structure mounting assembly is the same, and all has the reinforcing steel plate 3 and the reinforcing assembly 4. In terms of the steel structure mounting assembly, the assembly can also adopt any of the following features, and any feature can be selected alone:

[0035] The side surface of the lower end of the upper column 2 is provided with a positioning column 5, the reinforcing steel plate 3 is provided with a positioning hole 6 matched with the positioning column 5, the positioning column 5 makes the reinforcing steel plate 3 have a pre-hanging space when being mounted, and also provides support for the reinforcing steel plate 3. The length of the upper column 2 can be selected as required, and only a part is drawn for the convenience of showing the structure.

[0036] The two groups of steel angle strips 401 connected with the same reinforcing steel plate 3 are provided with a reinforcing connecting strip 7 therebetween, the two ends of the reinforcing connecting strip 7 are provided with clamping joints, and the two clamping joints are respectively clamped with the two groups of steel angle strips 401. And the reinforcing connecting strip 7 can absorb part of the stress through its own deformation in a long service period, and the reinforcing connecting strip 7 can be replaced regularly to improve the safety of the structure.

[0037] The clamping joint at both ends of the reinforcing connecting strip 7 is clamped with the clamping slot 8 of the steel angle strip 401, and a glue layer is arranged between the clamping joint of the reinforcing connecting strip 7 and the clamping slot 8.

[0038] The inside corner part of the steel angle strip 401 is provided with a filling strip 9, which is used to fit the side edges of two adjacent groups of reinforcing steel plates 3.

[0039] The multiple groups of fixing bolts one 402 in the same group of reinforcing assemblies 4 are respectively threadedly connected to two adjacent surfaces of the upper stand column 2, and the multiple groups of fixing bolts two 403 in the same group of reinforcing assemblies 4 are respectively threadedly connected to two adjacent surfaces of the lower stand column 1.

[0040] The reinforcing steel plate 3 is connected with a supporting connecting plate 10, and two groups of supporting connecting plates 10 of any reinforcing steel plate 3 are used to fixedly install a steel beam 11.

[0041] The third aspect relates to a housing layer-adding steel structure module, which comprises a lower stand column 1, an upper stand column 2, and a steel beam 11 installed at the connecting part of the two columns;

[0042] The lower stand column 1, the upper stand column 2, and the steel beam 11 are connected through the aforementioned steel structure installation assembly, and the end part of the steel beam 11 is connected with the reinforcing steel plate 3. The end part of the steel beam 11 can be connected with the reinforcing steel plate 3 by welding, or other methods such as riveting, bolt fixing, etc., or can be connected through the supporting connecting plate 10, such as connecting the supporting connecting plate 10 with the reinforcing steel plate 3 first, and then installing the steel beam 11 on the supporting connecting plate 10. Figure 1 The two supporting connecting plates 10 can be arranged on the upper and lower ends of one end of the steel beam 11, or both methods can be used at the same time. The supporting connecting plate 10 can be fixedly connected with the reinforcing steel plate 3 by bolt, welding, etc., which is not particularly limited. By connecting the supporting connecting plate 10 with the reinforcing steel plate 3, the force acting on the supporting connecting plate 10 is dispersed to the reinforcing steel plate 3. When the steel beam 11 sinks, the reinforcing steel plate 3 can be pulled through the supporting connecting plate 10, and the reinforcing steel plate 3 is supported on the positioning column 5 and locked on both sides by bolts, which has stronger bearing capacity.

[0043] Figure 1 Only one installation form of the steel beam 11 is shown, which can be installed on any side as needed, and a group of steel beams 11 can be installed on four sides. Due to the arrangement of the steel angle strip 401, the connected lower stand column 1 and upper stand column 2 not only have stronger bearing capacity, but also improve the tensile strength of the connection between the two, so that even if the steel beam 11 is arranged on only one side of the connection part, the connection part of the lower stand column 1 and the upper stand column 2 also has sufficient tensile strength.

[0044] The following will make specific description on some specific application examples of the housing layer-adding steel structure module in combination with the accompanying drawings:

[0045] Referring toFigures 1-4 This utility model relates to a steel structure installation component, comprising a lower column 1, an upper column 2 fixedly installed at the top of the lower column 1, and a set of reinforcing steel plates 3 on all four sides of one end of both the upper column 2 and the lower column 1. A reinforcing component 4 is provided between two adjacent sets of reinforcing steel plates 3. The reinforcing component 4 includes a steel angle strip 401, which can simultaneously contact two adjacent sets of reinforcing steel plates 3. Multiple sets of fixing bolts 402 and 403 are threadedly installed on the steel angle strip 401. Both fixing bolts 402 and 403 are threadedly connected to the inner side of the reinforcing steel plates 3. Fixing bolts 402 are threadedly connected to the inner side of the upper column 2, and fixing bolts 403 are threadedly connected to the inner side of the lower column 1. Two sets of limiting blocks 404 are fixedly installed at the bottom of the steel angle strip 401.

[0046] Four sets of positioning posts 5 are fixedly installed around the upper column 2. The reinforcing steel plate 3 has four sets of positioning holes 6 that match the positioning posts 5. During installation, the four sets of positioning holes 6 on the reinforcing steel plate 3 are aligned with the four sets of positioning posts 5, so that the four sets of positioning posts 5 are respectively inserted into the four sets of positioning holes 6. Since the four sets of positioning posts 5 are inserted horizontally into the four sets of positioning holes 6, the reinforcing steel plate 3 cannot fall downwards without the action of external force.

[0047] Two sets of reinforcing connecting strips 7 are provided between two adjacent sets of steel angle strips 401, and both ends of the reinforcing connecting strips 7 are provided with locking blocks; the reinforcing connecting strips 7 make the steel angle strips 401 more stable.

[0048] The locking blocks at both ends of the reinforcing connecting strip 7 match the slots 8 opened on the steel angle strip 401. An adhesive layer is provided between the locking blocks and the slots 8 on the reinforcing connecting strip 7. During installation, strong adhesive is applied to the locking blocks of the reinforcing connecting strip 7. After the locking blocks are inserted into the slots 8, the locking blocks can be stably fixed in the slots 8, thereby making the reinforcing connecting strip 7 stably installed. At this time, the reinforcing connecting strip 7 will be tightly attached to the reinforcing steel plate 3.

[0049] A filler strip 9 is fixedly installed on the steel angle strip 401. The filler strip 9 fits against two adjacent sets of reinforcing steel plates 3. The filler strip 9 can fill the steel angle strip 401 and the two adjacent sets of reinforcing steel plates 3, avoiding gaps between the steel angle strip 401 and the two adjacent sets of reinforcing steel plates 3, and also plays a certain role in limiting the position of the component.

[0050] Multiple sets of fixing bolts 402 in the same group of reinforcing components 4 are threaded to the two sides of the upper column 2, and multiple sets of fixing bolts 403 in the same group of reinforcing components 4 are threaded to the two sides of the lower column 1, ensuring that the reinforcing components 4 can simultaneously and stably fix and connect the upper column 2 and the lower column 1.

[0051] The reinforcing steel plate 3 is fixedly connected with a support connecting plate 10, and two groups of the support connecting plates 10 are fixedly installed with a steel beam 11; when the steel beam 11 is installed, one end of the steel beam 11 is connected with the reinforcing steel plate 3, and the top and bottom of the steel beam 11 are respectively matched with one group of the support connecting plates 10; the fixing mode between the two groups of the support connecting plates 10 and the steel beam 11 can adopt a welding mode or a bolt fixing mode, and the end of the steel beam 11 contacting the reinforcing steel plate 3 is welded with the reinforcing steel plate 3.

[0052] The utility model discloses working principle: when installing, four groups of reinforcing steel plate 3 are installed respectively on the four around of upper stand column 2 and lower stand column 1, and four groups of positioning hole 6 set up on reinforcing steel plate 3 are aligned four groups of positioning column 5, make four groups of positioning column 5 respectively card into four groups of positioning hole 6, because four groups of positioning column 5 transversely insert four groups of positioning hole 6, make reinforcing steel plate 3 under the action of no external force, cannot fall down, and the installation personnel are convenient to install reinforcing assembly 4 in succession;Then install steel angle strip 401 (also can install reinforcing steel plate 3 and steel angle strip 401 on upper stand column 2 and form sleeve first, then directly whole sleeve is set on the lower stand column 1 upper end), and steel angle strip 401 is simultaneously matched with two groups of reinforcing steel plate 3 adjacent, and the two groups of limiting block 404 of steel angle strip 401 bottom contact reinforcing steel plate 3, at this time, filling strip 9 will contact two groups of reinforcing steel plate 3 simultaneously, can fill steel angle strip 401 and two groups of reinforcing steel plate 3 adjacent, avoid the gap between steel angle strip 401 and two groups of reinforcing steel plate 3 adjacent, then the installation personnel will fixed bolt one 402 and multiple fixed bolt two 403, fixed bolt one 402 can be connected with steel angle strip 401, reinforcing steel plate 3 and upper stand column 2 simultaneously, make three stably fixed together, and fixed bolt two 403 can be connected with steel angle strip 401, reinforcing steel plate 3 and lower stand column 1 simultaneously, make three stably fixed together, further make the connection between steel structure stable, and four groups of reinforcing steel plate 3 are respectively at the four around of lower stand column 1 and upper stand column 2, and the connecting point between lower stand column 1 and upper stand column 2 is wrapped, can avoid the impact of external environment on the connecting point of lower stand column 1 and upper stand column 2, also reinforce the stability between lower stand column 1 and upper stand column 2, avoid the position deviation of lower stand column 1 and upper stand column 2 under stress.

[0053] After installing steel angle strip 401, can smear strong glue on the clamping block of reinforcing connecting strip 7 according to the need, after the clamping block is inserted into the clamping groove 8, the clamping block can be stably fixed in the clamping groove 8, and then the reinforcing connecting strip 7 is stably installed, at this time, the reinforcing connecting strip 7 is tightly matched with the reinforcing steel plate 3, and then the connection between the four groups of steel angle strips 401 is more stable.

[0054] Also can preliminarily install the fixed bolt first, then install and debug the reinforcing connecting strip 7 after finishing, finally, all the fixed bolts are finally tightened and locked, at this time, most of the stress of the connecting part is released, and the bolt is more stable after being tightened.

[0055] The above is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the utility model specific implementation is limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A steel construction connection reinforcement, characterized in that: The application relates to a reinforcing steel plate (3) for reinforcing the connection between the upper end of a lower column (1) and the lower end of an upper column (2), and a reinforcing assembly (4) for reinforcing the longitudinal four edges of the connection between the upper end of the lower column (1) and the lower end of the upper column (2). The reinforcing assembly (4) is an L-shaped corner piece, and the two steel corner strips (401) of the reinforcing assembly (4) can be connected with two adjacent reinforcing steel plates (3) respectively; a reinforcing connecting strip (7) is arranged between the two steel corner strips (401) on the two sides of any reinforcing steel plate (3); and a fixing hole one for penetrating a fixing bolt one (402) and a fixing hole two for penetrating a fixing bolt two (403) are arranged at the upper and lower ends of any steel corner strip (401) respectively.

2. The steel construction connection reinforcement according to claim 1, characterized in that: The side surface of the upper column (2) is provided with a positioning column (5) for limiting the reinforcing steel plate (3); the positioning column (5) is used for limiting the reinforcing steel plate (3) from moving along any plane of the upper column (2); the side end of the steel corner strip (401) is provided with a clamping groove (8), and the two ends of the reinforcing connecting strip (7) are provided with clamping joints which are embedded in the clamping grooves (8) of the two adjacent steel corner strips (401) respectively.

3. A steel structural member mounting assembly characterised in that: The application relates to a reinforcing steel plate (3) for reinforcing the connection between the upper end of a lower column (1) and the lower end of an upper column (2), and a reinforcing assembly (4) for reinforcing the longitudinal four edges of the connection between the upper end of the lower column (1) and the lower end of the upper column (2). The two steel corner strips (401) of any reinforcing assembly (4) are connected with two groups of reinforcing steel plates (3) on two adjacent surfaces respectively; at least one group of fixing bolt ones (402) and at least one group of fixing bolt twos (403) are arranged on the steel corner strip (401); the fixing bolt one (402) is used for connecting and locking the upper column (2) and the reinforcing steel plate (3); and the fixing bolt two (403) is used for connecting and locking the lower column (1) and the reinforcing steel plate (3).

4. The steel structural member mounting assembly according to claim 3, wherein: The side surface of the lower end of the upper column (2) is provided with a positioning column (5), and the reinforcing steel plate (3) is provided with a positioning hole (6) matched with the positioning column (5).

5. The steel structural member mounting assembly according to claim 3, wherein: The two groups of steel corner strips (401) connected with the same reinforcing steel plate (3) are provided with a reinforcing connecting strip (7) therebetween, and the two ends of the reinforcing connecting strip (7) are provided with clamping joints which are clamped with the two groups of steel corner strips (401) respectively.

6. The steel structural member mounting assembly according to claim 5, wherein: The clamping joints at the two ends of the reinforcing connecting strip (7) are clamped with the clamping grooves (8) of the steel corner strips (401), and a glue layer is arranged between the clamping joints of the reinforcing connecting strip (7) and the clamping grooves (8).

7. The steel structural member mounting assembly according to claim 3, wherein: A filling strip (9) is arranged on the inner side of the corner part of the steel corner strip (401), and the filling strip (9) is used for abutting the side edges of the two adjacent groups of reinforcing steel plates (3).

8. The steel structural member mounting assembly according to claim 3, wherein: The multiple groups of fixing bolt ones (402) in the same group of reinforcing assemblies (4) are respectively screwed with two adjacent surfaces of the upper column (2), and the multiple groups of fixing bolt twos (403) in the same group of reinforcing assemblies (4) are respectively screwed with two adjacent surfaces of the lower column (1).

9. The steel structural member mounting assembly according to claim 3, wherein: The reinforcing steel plate (3) is connected with a supporting connecting plate (10), and the two groups of supporting connecting plates (10) of any reinforcing steel plate (3) are used for fixedly arranging a steel beam (11) therebetween.

10. A steel structure module for adding a floor to a building, characterized in that, The steel structure comprises a lower column (1), an upper column (2) and a steel beam (11) installed at the joint of the two columns; The lower column (1), the upper column (2) and the steel beam (11) are connected by the steel structure mounting assembly of any one of claims 3-9, and the end of the steel beam (11) is connected with the reinforcing steel plate (3).

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