A cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab bending reinforcement structure

Abstract

This invention relates to the field of building construction technology and proposes a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab bending reinforcement structure. The structure includes a corrugated steel sheet and multiple steel trusses mounted on the corrugated steel sheet. Multiple rows of fixing components are installed on the steel trusses, and the multiple steel trusses are respectively fixed to the corrugated steel sheet via these fixing components. Multiple rows of secondary trusses are fixedly installed on the corrugated steel sheet, with the secondary trusses located between two steel trusses. A wire mesh is fixedly installed on one side of the corrugated steel sheet, and carbon fiber cloth is fixedly installed on the other side of the wire mesh. The steel trusses and fixing components are all located on the side of the carbon fiber cloth. Through the wire mesh and carbon fiber cloth between the corrugated steel sheet and the steel trusses, the tensile strength and overall stiffness of the floor slab in the tension zone are significantly improved, and deflection deformation during use is effectively reduced. Furthermore, with the cooperation of the secondary trusses, the in-plane stiffness and load distribution capacity of the floor slab are further enhanced.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab bending reinforcement structure. Background Technology

[0002] Cold-formed thin-walled steel truss-corrugated steel sheet composite floor slabs have been widely used in low-rise and multi-story prefabricated steel structure buildings due to their advantages such as light weight, fast construction speed and good seismic performance. This type of floor slab usually uses corrugated steel sheets as the bottom formwork and load-bearing layer, with cold-formed thin-walled steel trusses set on the top, and the whole load-bearing system is formed by self-tapping screws or welding.

[0003] Chinese patent application CN223202566U discloses a composite steel truss floor deck, comprising a profiled steel sheet and a truss. The truss includes a second member and two sets of opposing truss reinforcement assemblies. Each truss reinforcement assembly includes a first member with several truss reinforcement bars welded along its length. Both sets of truss reinforcement assemblies are welded to the second member. The top of the profiled steel sheet has several first and second protruding platforms. The truss of this invention can rest on the top of the profiled steel sheet via slots and the second protruding platforms, creating a space between the truss and the profiled steel sheet. Concrete can fill this space, improving the bond between the concrete and the steel truss floor deck. Furthermore, one side of the truss is inserted into the slot, which limits the truss's position. Therefore, the truss has good stability after being welded to the profiled steel sheet at both ends, reducing the number of weld points between the truss and the profiled steel sheet and decreasing the amount of welding work.

[0004] However, the implementation of the relevant technology revealed the following problems with the above solution: the shear force between the profiled steel sheet and the steel truss is transferred only through discrete screws or welds, resulting in limited connection stiffness. Under bending loads, relative slippage easily occurs between the two sections, leading to uncoordinated cross-sectional strain, which in turn prevents the tensile strength of the steel from being fully utilized, resulting in poor overall bending bearing capacity. Summary of the Invention

[0005] This invention proposes a bending-strengthening structure for a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab. This solves the problem in related technologies where shear force is transferred between the corrugated steel sheet and the steel truss solely through discrete screws or welds, resulting in limited connection stiffness. Under bending loads, relative slippage easily occurs between the cross-sections, leading to strain inconsistency and preventing the steel from fully utilizing its tensile strength, resulting in poor overall bending load-bearing capacity.

[0006] The technical solution of the present invention is as follows: a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab anti-bending reinforcement structure, comprising a corrugated steel sheet and a plurality of steel trusses disposed on the corrugated steel sheet, wherein the steel trusses are provided with a plurality of rows of fixing components, and the plurality of steel trusses are respectively fixedly installed on the corrugated steel sheet by the plurality of rows of fixing components.

[0007] Multiple rows of secondary trusses are fixedly installed on the profiled steel plate, and the secondary trusses are located between two steel trusses.

[0008] A metal wire mesh is fixedly installed on one side of the profiled steel sheet, and a carbon fiber cloth is fixedly installed on one side of the metal wire mesh. The steel truss and the fixing components are both located on one side of the carbon fiber cloth.

[0009] Preferably, the profiled steel plate is provided with arched structures at equal intervals.

[0010] Preferably, two metal pressure plates are symmetrically fixed at the edge of the profiled steel sheet by self-tapping screws, and the metal wire mesh and the carbon fiber cloth are both located between the profiled steel sheet and the metal pressure plates.

[0011] Preferably, the secondary truss includes two first auxiliary rods symmetrically fixedly installed on the profiled steel plate, and a connecting rod is provided in the middle of the two first auxiliary rods, with both ends of the connecting rod being fixedly connected to the two first auxiliary rods respectively;

[0012] Preferably, a support frame is fixedly installed on the outer side wall of each of the two first auxiliary rods, and a second auxiliary rod is fixedly installed at the other end of the two support frames.

[0013] Preferably, the fixing component includes a fixing frame fixedly installed on the profiled steel plate, a lower rod on the profiled steel plate being engaged in a groove on the fixing frame, a fixing shell being fastened to the fixing frame, and screw holes being provided on both the fixing frame and the fixing shell, with bolts threaded into the interconnected screw holes.

[0014] Preferably, the top of the fixing frame and the bottom wall of the fixing shell are both provided with mounting grooves, and a support column is inserted into the connected mounting groove.

[0015] Preferably, the bottom of the support column is provided with a snap-fit ​​groove, and the fixing bracket is snapped into the snap-fit ​​groove.

[0016] Preferably, the carbon fiber cloth is adhered to the outer surface of the metal wire mesh, and the width of the carbon fiber cloth is greater than the width of the metal wire mesh, so as to completely cover the tension area of ​​the profiled steel sheet.

[0017] The working principle and beneficial effects of this invention are as follows:

[0018] 1. The use of wire mesh and carbon fiber cloth between the profiled steel sheet and the steel truss significantly improves the tensile strength and overall stiffness of the floor slab in the tension zone, and effectively reduces deflection during use. In addition, with the cooperation of the secondary truss, the in-plane stiffness and load distribution capacity of the floor slab are further enhanced. Furthermore, the profiled steel sheet is provided with arched structures at equal intervals to increase its bending resistance and facilitate drainage.

[0019] 2. The metal pressure plate can tightly press and fix the edges of the metal wire mesh and carbon fiber cloth onto the profiled steel plate, effectively preventing the metal wire mesh and carbon fiber cloth from peeling, warping or separating at the edges during use. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure proposed in this invention;

[0022] Figure 2 This invention provides a schematic diagram of the structure of a metal pressure plate.

[0023] Figure 3 This invention provides a schematic diagram of the planar cross-sectional structure of the profiled steel sheet;

[0024] Figure 4 This invention provides a schematic diagram of the secondary truss structure.

[0025] Figure 5 A structural schematic diagram of the steel truss is provided for this invention;

[0026] Figure 6 A schematic diagram of the fixing component is provided for this invention.

[0027] In the diagram: 1. Corrugated steel sheet; 2. Steel truss;

[0028] 3. Fixing components; 31. Fixing bracket; 32. Fixing housing; 33. Screw holes; 34. Bolts;

[0029] 4. Secondary truss; 41. First auxiliary member; 42. Connecting member; 43. Support frame; 44. Second auxiliary member;

[0030] 5. Metal wire mesh; 6. Carbon fiber cloth; 7. Metal pressure plate; 8. Mounting groove; 9. Support column; 10. Snap-fit ​​groove. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1 - Figure 6 A cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab anti-bending reinforcement structure includes a corrugated steel sheet 1 and multiple steel trusses 2 arranged on the corrugated steel sheet 1. Multiple rows of fixing components 3 are arranged on the steel trusses 2, and the multiple steel trusses 2 are respectively fixedly installed on the corrugated steel sheet 1 through the multiple rows of fixing components 3.

[0033] Multiple rows of secondary trusses 4 are fixedly installed on the profiled steel sheet 1, and the secondary trusses 4 are located between two steel trusses 2;

[0034] A metal wire mesh 5 is fixedly installed on one side of the profiled steel sheet 1, and a carbon fiber cloth 6 is fixedly installed on one side of the metal wire mesh 5. The steel truss 2 and the fixing component 3 are both located on one side of the carbon fiber cloth 6. The carbon fiber cloth 6 is pasted on the outer side of the metal wire mesh 5, and the width of the carbon fiber cloth 6 is greater than the width of the metal wire mesh 5, so as to completely cover the tension area of ​​the profiled steel sheet 1.

[0035] This invention provides a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab bending reinforcement structure. The corrugated steel sheet 1 has evenly spaced arched structures to increase its bending resistance. During use, the carbon fiber cloth 6, with its inherent tensile strength, can directly bear the tensile stress generated by bending loads. Simultaneously, with the cooperation of the metal wire mesh 5, shear force can be effectively transferred and the deformation of the carbon fiber cloth 6 can be constrained, thereby significantly improving the tensile strength of the floor slab's tension zone and its overall bending stiffness. Furthermore, the secondary truss 4 further enhances the in-plane stiffness and load distribution uniformity of the floor slab, effectively reducing deflection deformation during use and preventing the steel's tensile strength from being underutilized due to interface slippage.

[0036] Furthermore, two metal pressure plates 7 are symmetrically fixed at the edge of the profiled steel sheet 1 by self-tapping screws, and the metal wire mesh 5 and carbon fiber cloth 6 are located between the profiled steel sheet 1 and the metal pressure plates 7.

[0037] Specifically, the metal pressure plate 7 can tightly press and fix the edges of the metal wire mesh 5 and carbon fiber cloth 6 onto the profiled steel plate 1, thereby constraining and reinforcing the edges and preventing them from peeling, warping or detaching under long-term load or temperature changes, thus ensuring the reliability of the coordinated work of the metal wire mesh 5, carbon fiber cloth 6 and profiled steel plate 1.

[0038] Furthermore, the secondary truss 4 includes two first auxiliary rods 41 symmetrically fixedly installed on the profiled steel plate 1, and a connecting rod 42 is provided in the middle of the two first auxiliary rods 41. The two ends of the connecting rod 42 are respectively fixedly connected to the two first auxiliary rods 41.

[0039] A support frame 43 is fixedly installed on the outer side wall of each of the two first auxiliary rods 41, and a second auxiliary rod 44 is fixedly installed on the other end of the two support frames 43.

[0040] Specifically, the secondary truss 4 formed by the first auxiliary rod 41, connecting rod 42, support frame 43 and the second auxiliary rod 44 can effectively support and distribute the vertical load transmitted by the floor slab, enhance the in-plane stiffness of the floor in the lateral and longitudinal directions, reduce the relative deformation between the main trusses, and improve the overall stress uniformity and bending bearing capacity of the floor.

[0041] Furthermore, the fixing component 3 includes a fixing frame 31 fixedly installed on the profiled steel plate 1. The lower rod on the profiled steel plate 1 is engaged in the groove on the fixing frame 31. A fixing shell 32 is fastened on the fixing frame 31. Both the fixing frame 31 and the fixing shell 32 are provided with screw holes 33. Bolts 34 are threaded into the interconnected screw holes 33.

[0042] Specifically, the lower member of the steel truss 2 is embedded into the groove of the fixing frame 31 for positioning, the fixing shell 32 is fastened to the fixing frame 31, and finally the fixing shell 32 and the fixing frame 31 are tightly fixed together through the screw hole 33 and the bolt 34, so that the steel truss 2 can be stably fixed on the profiled steel sheet 1.

[0043] Furthermore, the top of the fixing frame 31 and the bottom wall of the fixing shell 32 are both provided with mounting grooves 8, and a support column 9 is inserted into the connected mounting grooves 8. A snap-fit ​​groove 10 is provided at the bottom of the support column 9, and the fixing frame 31 is snapped into the snap-fit ​​groove 10.

[0044] Specifically, the support column 9 is installed in the fixed frame 31 and the fixed shell 32 through the installation groove 8, so that the support column 9 can directly bear the vertical pressure transmitted by the fixed shell 32 and transmit the pressure to the fixed frame 31 and the profiled steel plate 1, thereby enhancing the compressive bearing capacity of the connection node. Secondly, during installation, the support column 9 is engaged and positioned with the fixed frame 31 through the snap-fit ​​groove 10 at the bottom, so that the support column 9 will not undergo horizontal displacement or deflection after installation, improving the stability of the support and further enhancing the integrity of the connection node under complex stress conditions.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab bending reinforcement structure, comprising a corrugated steel sheet (1) and a plurality of steel trusses (2) disposed on the corrugated steel sheet (1), characterized in that, The steel truss (2) is provided with multiple rows of fixing components (3), and multiple steel trusses (2) are respectively fixedly installed on the profiled steel plate (1) by the multiple rows of fixing components (3); Multiple rows of secondary trusses (4) are fixedly installed on the profiled steel sheet (1), and the secondary trusses (4) are located between two steel trusses (2); A metal wire mesh (5) is fixedly installed on one side of the profiled steel sheet (1), and a carbon fiber cloth (6) is fixedly installed on one side of the metal wire mesh (5). The steel truss (2) and the fixing component (3) are both located on one side of the carbon fiber cloth (6).

2. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 1, characterized in that: The profiled steel sheet (1) is provided with arched structures at equal intervals.

3. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 1, characterized in that: Two metal pressure plates (7) are symmetrically fixed at the edge of the profiled steel sheet (1) by self-tapping screws. The metal wire mesh (5) and the carbon fiber cloth (6) are both located between the profiled steel sheet (1) and the metal pressure plates (7).

4. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 1, characterized in that: The secondary truss (4) includes two first auxiliary rods (41) symmetrically fixedly installed on the profiled steel plate (1). A connecting rod (42) is provided in the middle of the two first auxiliary rods (41), and the two ends of the connecting rod (42) are fixedly connected to the two first auxiliary rods (41) respectively.

5. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 4, characterized in that: A support frame (43) is fixedly installed on the outer side wall of each of the two first auxiliary rods (41), and a second auxiliary rod (44) is fixedly installed at the other end of the two support frames (43).

6. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 1, characterized in that: The fixing component (3) includes a fixing frame (31) fixedly installed on the profiled steel plate (1), the lower rod on the profiled steel plate (1) is engaged in the groove on the fixing frame (31), the fixing frame (31) is fastened with a fixing shell (32), and both the fixing frame (31) and the fixing shell (32) are provided with screw holes (33), and bolts (34) are threaded into the interconnected screw holes (33).

7. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 4, characterized in that: The top of the fixed frame (31) and the bottom wall of the fixed shell (32) are both provided with mounting grooves (8), and a support column (9) is inserted into the connected mounting grooves (8).

8. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 5, characterized in that: The bottom of the support column (9) is provided with a snap-fit ​​groove (10), and the fixing frame (31) is snapped into the snap-fit ​​groove (10).

9. The bending-resistant reinforcement structure of a cold-formed thin-walled steel truss-corrugated steel sheet composite floor slab according to claim 1, characterized in that: The carbon fiber cloth (6) is pasted on the outer side of the metal wire mesh (5), and the width of the carbon fiber cloth (6) is greater than the width of the metal wire mesh (5) so as to completely cover the tension area of ​​the profiled steel sheet (1).

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