A cold-formed steel-aluminum laminate (ALC) panel composite floor and concrete beam composite structure

Abstract

The application discloses a kind of cold-formed steel-ALC plate combination floor and the combination structure of concrete beam, its connecting piece is pot-shaped connecting piece or channel steel connecting piece, be arranged in the both ends of cold-formed steel, for cold-formed steel is erected on concrete beam;Pot-shaped connecting piece includes rectangular steel strip and obliquely arranged prismatic steel strip, one end top of rectangular steel strip is attached to the upper flange of cold-formed steel, and the other end extends outward;The top of prismatic steel strip is connected with the bottom of rectangular steel strip, and the side wall is attached to the web of cold-formed steel;The web of channel steel connecting piece is attached to the web of cold-formed steel at one end, and extends outward at the other end.The application can be factory prefabricated, on-site assembly, reliable connection, clear force transmission path, fast construction speed, give full play to the advantages of cold-formed steel and concrete material, expand the application range of cold-formed steel structure, so that cold-formed steel-concrete composite structure becomes possible, applicable to high-rise building.

Description

Technical Field

[0001] This invention belongs to the field of building assembly technology, specifically relating to a combined structure of cold-formed steel-ALC plate composite floor and concrete beam. Background Technology

[0002] With the increasing development of modern industrial systems, the construction industry is moving towards integration, greening, and prefabrication. Prefabricated buildings have the advantage of significantly reducing the amount of building materials and energy consumption, and will become an important carrier for achieving sustainable development.

[0003] Vigorously developing new composite structural systems that are green, environmentally friendly, and have excellent seismic performance is of great significance for promoting sustainable social development, reducing pollution, and saving energy. At the same time, it promotes the industrialization of prefabricated building construction, the standardization of construction, and the industrialization of housing in my country.

[0004] Cold-formed steel, also known as cold-formed thin-walled steel, is formed by cold working steel sheets, strips, plates, or bars, typically with a thickness of less than 2 mm. Compared to traditional hot-rolled steel, cold-formed steel can economically achieve a reasonable cross-sectional shape and a satisfactory strength-to-weight ratio.

[0005] Cold-formed steel is characterized by its environmental friendliness, good seismic performance, fast construction speed, and recyclability. The cold-formed steel beam-keel-ALC slab composite floor system meets the requirements for in-plane stiffness, vibration resistance, and sound insulation. Under high-floor load conditions (5kN / m²), the cold-formed steel beam-keel-ALC slab composite floor system... 2 The fire resistance time of the test specimens was greater than 60 minutes, meeting the fire resistance limit requirements of composite floor slabs for multi-story civil buildings in my country's current building fire protection design code. Cold-formed steel composite structures, as enclosure structures, can mitigate casualties caused by enclosure structure damage and collapse during disasters.

[0006] Concrete structures are heavy, slow to construct, and consume significant resources, but they offer good formability and overall integrity. Therefore, a composite structure is needed to fully utilize the advantages of both concrete and cold-formed steel. Summary of the Invention

[0007] Technical problem solved: To address the above-mentioned technical problems, the present invention provides a combined structure of cold-formed steel-ALC slab composite floor and concrete beams. The cold-formed steel-ALC slab composite floor structure is used as the enclosure structure, and the concrete components are used as the main structure. The connection problem between the two is solved by reliable connectors, forming a cold-formed steel-concrete composite structure, which is suitable for high-rise building structures.

[0008] Technical solution: a combined structure of cold-formed steel-ALC plate combined floor and concrete beam, comprising a cold-formed steel-ALC plate combined floor, a concrete beam and a connecting piece; the cold-formed steel-ALC plate combined floor comprises ALC plates, cold-formed steel and suspended ceiling plates arranged in sequence from top to bottom, and the connecting piece is a U-shaped connecting piece or a channel steel connecting piece arranged at both ends of the cold-formed steel and used for erecting the cold-formed steel on the concrete beam;

[0009] The U-shaped connecting piece comprises a rectangular steel strip and an obliquely arranged prismatic steel strip, one end of the rectangular steel strip is attached to the top of the upper flange of the cold-formed steel, and the other end extends outward; the top of the prismatic steel strip is connected to the bottom of the rectangular steel strip, and the side wall is attached to the web of the cold-formed steel;

[0010] The web of the channel steel connecting piece is attached to the web of the cold-formed steel at one end and extends outward at the other end.

[0011] Preferably, when the U-shaped connecting piece is used, a stud is welded on the top end face of the rectangular steel strip, and a fixing piece is connected to two studs located at the same position in the transverse direction of the concrete beam.

[0012] Further, adjacent studs located on the same side in the longitudinal direction of the concrete beam are connected by a tieback.

[0013] Preferably, when the channel steel connecting piece is used, a stud is welded on the web, and a fixing piece is connected to two studs located at the same position in the transverse direction of the concrete beam.

[0014] Preferably, when the channel steel connecting piece is used, a U-shaped light steel joist is arranged at the end face of the cold-formed steel.

[0015] Preferably, the combined structure further comprises a steel mesh and a concrete layer, the steel mesh is laid on the ALC plate, and the concrete layer is formed by pouring concrete on the steel mesh and the concrete beam, and the top surface is a horizontal surface.

[0016] Preferably, the width of the rectangular steel strip is equal to the width of the inside of the upper flange of the cold-formed steel.

[0017] Preferably, the side wall of the prismatic steel strip is connected to the web of the cold-formed steel by a bolt; the web of the channel steel connecting piece is connected to the web of the cold-formed steel by a bolt.

[0018] Preferably, the flange width of the channel steel connecting piece is equal to the inside width of the flange of the cold-formed steel, and the web width is 150-200mm.

[0019] Preferably, the cold-formed steel is a C-shaped cold-formed steel, and a support belt is connected between the bottoms of adjacent cold-formed steels on the same cold-formed steel-ALC plate combined floor.

[0020] Beneficial effects: the cold-formed steel-ALC plate combined floor of the application has light self weight and good ductility, improves the structural seismic performance, deforms together with the cold-formed steel and the concrete beam structure when disaster comes, that is, good 'follow-up performance', enhances the anti-collapse capacity, conforms to the 'rigidity and flexibility' concept of structural design, improves the concrete structure layer height, and forms a cold-formed steel-precast concrete structure system.

[0021] The adopted U-shaped connecting piece or channel steel connecting piece has reliable connection stress, clear force transmission path, high strength and good ductility, is convenient for assembly construction and factory prefabrication, conforms to the'strong node' concept of structural design, and meets the construction convenience in structure. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a combined structure schematic diagram of the cold-formed steel-ALC plate combined floor structure with a U-shaped connecting piece and the concrete beam provided by the embodiment of the application;

[0023] Figure 2 is a combined structure schematic diagram of the cold-formed steel-ALC plate combined floor structure with a channel steel connecting piece and the concrete beam provided by the embodiment of the application;

[0024] Figure 3 is a cold-formed steel end structure schematic diagram using a U-shaped connecting piece;

[0025] Figure 4 is a cold-formed steel end structure schematic diagram using a channel steel connecting piece;

[0026] In the figure, each number represents the following: 1. cold-formed steel-ALC plate combined floor; 2. concrete beam; 3. U-shaped connecting piece; 4. channel steel connecting piece; 5. stud; 6. fixing piece; 7. tie bar; 8. U-shaped light steel joist; 9. steel mesh; 10. concrete layer; 11. support belt; 1-1. ALC plate; 1-2. cold-formed steel; 1-3. suspended ceiling plate; 3-1. rectangular steel strip; 3-2. prismatic steel strip. DETAILED DESCRIPTION

[0027] The application will be further described below in combination with the drawings and specific embodiments.

[0028] Embodiment 1

[0029] As Figure 1As shown, a composite structure of a cold-formed steel-ALC slab floor and a concrete beam includes a cold-formed steel-ALC slab floor 1, a concrete beam 2, and connectors. The cold-formed steel-ALC slab floor 1 includes an ALC slab 1-1, a cold-formed steel 1-2, and a ceiling slab 1-3 arranged sequentially from top to bottom. The connectors are U-shaped connectors 3, located at both ends of the cold-formed steel 1-2, used to support the cold-formed steel 1-2 on the concrete beam 2, thereby sequentially placing the pre-assembled cold-formed steel-ALC slab floor 1 onto the concrete beam 2. Then, a wire mesh 9 is laid on the ALC slab 1-1, and concrete is poured onto the wire mesh 9 and the concrete beam 2 until a horizontal concrete layer 10 is formed at the top, thus forming the entire floor structure.

[0030] Combination Figure 3 As shown, the prismatic connector 3 includes a rectangular steel strip 3-1 and an inclined prismatic steel strip 3-2. One end of the rectangular steel strip 3-1 is welded to the upper flange of the cold-formed steel 1-2, and the other end extends outward; its width is equal to the inner width of the upper flange of the cold-formed steel 1-2, preferably 45~50mm.

[0031] The top of the prismatic steel strip 3-2 is welded to the bottom of the rectangular steel strip 3-1; the sidewall is bolted to the web of the cold-formed steel 1-2, the number of bolts being calculated, and the bolt hole diameter preferably being 8~12mm. Its thickness is preferably 5~10mm, and the inclination angle of the prismatic steel strip 3-2 is preferably 45°.

[0032] A stud 5 is welded to the top surface of the rectangular steel strip 3-1, and a fastener 6 is connected to two studs 5 located at the same transverse position of the concrete beam 2. The fastener 6 can be a steel strip welded to the two studs 5. Adjacent studs 5 located on the same longitudinal side of the concrete beam 2 are connected by tie bars 7. Through the above components and the rectangular connector 3 itself, the adhesion slippage can be better resisted.

[0033] Example 2

[0034] like Figure 2 As shown, the system includes a cold-formed steel-ALC slab composite floor slab 1, a concrete beam 2, and connectors. The cold-formed steel-ALC slab composite floor slab 1 comprises an ALC slab 1-1, a cold-formed steel slab 1-2, and a ceiling slab 1-3 arranged sequentially from top to bottom. The connectors are channel steel connectors 4, located at both ends of the cold-formed steel slab 1-2, used to support the cold-formed steel slab 1-2 on the concrete beam 2. The pre-assembled cold-formed steel-ALC slab composite floor slab 1 is then sequentially placed on the concrete beam 2. A wire mesh 9 is then laid on the ALC slab 1-1, and concrete is poured onto the wire mesh 9 and the concrete beam 2 until a horizontal concrete layer 10 is formed at the top, thus completing the floor slab assembly.

[0035] CombinationFigure 4 As shown, one end of the web of the channel steel connector 4 is welded with the web of the cold-formed steel 1-2 and connected through bolts with a hole diameter of 8-12 mm; the other end extends outward to the concrete beam 2. The thickness thereof is preferably 5-10 mm, the flange width is equal to the inner width of the flange of the cold-formed steel 1-2, preferably 45-50 mm, and the web width is 150-200 mm. The web is welded with studs 5, and the fixing member 6 is connected on the two studs 5 at the same position in the transverse direction of the concrete beam 2, which can be a steel strip welded on the two studs 5. Meanwhile, a U-shaped light steel joist 8 is arranged at the end face of the cold-formed steel 1-2. Through the above components and the channel steel connector 4 itself, the bonding slip can be better resisted.

[0036] Example 3

[0037] On the basis of Example 1 or Example 2, the pre-assembled cold-formed steel-ALC panel composite floor 1 can also be provided as follows:

[0038] The thickness of the ALC panel 1-1 is set to 100-150 mm, and the ALC panel 1-1 is connected with the cold-formed steel 1-2 through self-tapping screws with a length of 120-130 mm.

[0039] The cold-formed steel 1-2 is set to be a C-shaped cold-formed steel with a model of C255 or C305, and the distance between adjacent cold-formed steels 1-2 on the same cold-formed steel-ALC panel composite floor 1 is 400-600 mm, and a support strip 11 is connected between the bottoms thereof, which can be a flat steel strip, thereby providing transverse support for the cold-formed steel 1-2.

[0040] The thickness of the suspended ceiling panel 1-3 is set to 1.5-3 mm, and the cold-formed steel 1-2, the support strip 11 and the suspended ceiling panel 1-3 are connected through self-tapping screws.

[0041] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application claims and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A composite structure of a cold-formed steel-ALC panel composite floor and a concrete beam, characterized by, The application relates to a cold-formed steel-ALC plate combined floor (1), a concrete beam (2) and a connecting piece; the cold-formed steel-ALC plate combined floor (1) comprises ALC plates (1-1), cold-formed steels (1-2) and suspended ceiling plates (1-3) arranged in sequence from top to bottom; the connecting piece is a pot-shaped connecting piece (3) or a channel steel connecting piece (4) arranged at the two ends of the cold-formed steel (1-2) and used for erecting the cold-formed steel (1-2) on the concrete beam (2). The pot-shaped connecting piece (3) comprises a rectangular steel strip (3-1) and an obliquely arranged prismatic steel strip (3-2); one end of the top of the rectangular steel strip (3-1) is attached to the upper flange of the cold-formed steel (1-2), and the other end extends outward; the top of the prismatic steel strip (3-2) is connected with the bottom of the rectangular steel strip (3-1), and the side wall is attached to the web of the cold-formed steel (1-2); when the pot-shaped connecting piece (3) is used, the top end face of the rectangular steel strip (3-1) is welded with a stud (5), and two studs (5) located at the same position in the transverse direction of the concrete beam (2) are connected with a fixing piece (6). The web of the channel steel connecting piece (4) is attached to the web of the cold-formed steel (1-2) at one end and extends outward at the other end; when the channel steel connecting piece (4) is used, the web is welded with a stud (5), and two studs (5) located at the same position in the transverse direction of the concrete beam (2) are connected with a fixing piece (6).

2. The composite structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, The adjacent studs (5) located at the same side in the longitudinal direction of the concrete beam (2) are connected through a tie bar (7).

3. The combined structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, When the channel steel connecting piece (4) is used, a U-shaped light steel joist (8) is arranged at the end face of the cold-formed steel (1-2).

4. The combined structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, The combined structure further comprises a steel mesh (9) and a concrete layer (10); the steel mesh (9) is laid on the ALC plate (1-1), and the concrete layer (10) is formed by pouring concrete on the steel mesh (9) and the concrete beam (2) and has a horizontal top surface.

5. The combined structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, The width of the rectangular steel strip (3-1) is equal to the width of the inside of the upper flange of the cold-formed steel (1-2).

6. The combined structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, The side wall of the prismatic steel strip (3-2) is connected with the web of the cold-formed steel (1-2) through a bolt, and the web of the channel steel connecting piece (4) is connected with the web of the cold-formed steel (1-2) through a bolt.

7. The combined structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, The flange width of the channel steel connecting piece (4) is equal to the inside width of the flange of the cold-formed steel (1-2), and the web width is 150-200 mm.

8. The combined structure of cold-formed steel-ALC panel composite floor and concrete beam according to claim 1, characterized in that, The cold-formed steel (1-2) is a C-shaped cold-formed steel, and a support belt (11) is arranged between the bottoms of the adjacent cold-formed steels (1-2) on the same cold-formed steel-ALC plate combined floor (1).

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