Fireproof coating-free shell column having built-in reinforcement cage

Abstract

Disclosed is a fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage, including a CS(corrugated steel)-Frame column and a steel reinforcement cage; the steel reinforcement cage being placed inside the CS(corrugated steel)-Frame column, and the concrete being poured inside the CS(corrugated steel)-Frame column. As the CS(corrugated steel)-Frame column of the disclosure has a steel reinforcement cage inside, the column can still meet the structural stress requirements under fire conditions, considering that the frame doesn't work, therefore, the column of the disclosure can meet the requirements of fire code without brushing fire retardant coating, and achieve the technical effect of not brushing the fire retardant coating, and ensure that the outer surface of the column has architectural modeling characteristics, and the components have regular modeling and appropriate weight, which is convenient for long-distance transportation and is economical.

Description

Technical Field

[0001] The present invention relates to the technical field of CS(corrugated steel)-Frame columns, in particular to a fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage.Background

[0002] The Patent, entitled "Solid Steel Bar and Corrugated Steel Plate Combined Column", by Nantong Ouben Construction Technology Co., Ltd., with the publication number: 202121349195.2, "steel rod CS(corrugated steel)-Frame column" for short, has been applied in engineering projects due to its high utilization rate of steel, good seismic performance, construction without formwork and support, and easy pouring of concrete. Studies have shown that for combined columns covered with steel, under fire conditions, the outer surface temperature rises faster than the internal, and the stiffness and strength of the components degrade faster than those of steel reinforced concrete columns. Therefore, it is often necessary to apply fire protection such as fire retardant coating or fire-proof plate on the outer surface of the column to meet the requirements of bearing capacity under fire conditions, and the fire-proof protection layer not only increases the cost and requires more processes, but also affects the aesthetics. If a steel reinforcement cage can be added inside the CS(corrugated steel)-Frame column, the problem of bearing capacity under fire conditions can be solved, thus eliminating the fire-proof protection layer on the outer surface of the column.Summary of the Invention

[0003] The object of the present invention is to provide a CS(corrugated steel)-Frame column with a built-in steel reinforcement cage, which has good fire-proof protection effect and achieves the technical effect of not brushing the fire retardant coating.

[0004] In order to achieve the above object, the present invention provides a fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage, including a CS(corrugated steel)-Frame column and a steel reinforcement cage; The steel reinforcement cage is placed inside the CS(corrugated steel)-Frame column, and the concrete is poured inside the CS(corrugated steel)-Frame column.

[0005] Further, the CS(corrugated steel)-Frame column is a steel rod CS(corrugated steel)-Frame column, and the steel rod CS(corrugated steel)-Frame column includes four solid steel rods located at the corners, with corrugated side panels arranged transversely between the adjacent solid steel rods.

[0006] Further, all four corners of the CS(corrugated steel)-Frame column adopt angle steel profiles, and the angle steel profiles are L-shaped or concentric square-shaped.

[0007] Further, the steel reinforcement cage has a rectangular or circular cross-section.

[0008] Further, the steel reinforcement cage is composed of longitudinal bars and stirrups, and a plurality of the longitudinal bars are arranged at equal intervals to form a circular or square longitudinal bar column, and are fixed by binding or welding of the stirrups.

[0009] Further, the number of the longitudinal bars is not less than four.

[0010] Further, the plurality of the longitudinal bars are arranged at equal intervals from the vertical direction of the longitudinal bar column or are spirally fixed outside the longitudinal bar column.

[0011] Further, the steel reinforcement cage is positioned in the CS(corrugated steel)-Frame column by means of a limiting clip; the limiting clip is sleeved on the longitudinal bar and then clamped between four corner steel pipes of the CS(corrugated steel)-Frame column.

[0012] Further, the concrete is poured on site.

[0013] Compared with the prior art, the present invention has the following advantages: 1. Concrete can be poured on site without formwork or support, simplifying on-site construction steps and reducing construction period. 2. Under the normal use condition without fire, the designed frame and the internal steel reinforced concrete work together to bear axial force, bending moment and shearing force, and have good stress performance. 3. Due to the internal steel reinforcement cage, the column still meets the structural stress requirements under fire conditions, considering that the frame doesn't work. Therefore, the column can meet the requirements of fire code without brushing fire retardant coating, achieve the technical effect of not brushing the fire retardant coating, and ensure the aesthetics of the outer surface of the column. 4. The shape of corrugated surface makes the appearance has architectural characteristics; and the components have regular modeling and appropriate weight, which is convenient for long-distance transportation and is economical. Brief Description of the Drawings

[0014] FIG. 1 is a schematic diagram of the overall structure of a CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to an embodiment of the present invention; FIG. 2 is a sectional perspective view of a steel rod CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to an embodiment of the present invention; FIG. 3 is a sectional perspective view of a concentric squares-shaped angle steel CS(corrugated steel)-Frame column according to an embodiment of the present invention; FIG. 4 is a sectional perspective view of an L-shaped angle steel CS(corrugated steel)-Frame column according to an embodiment of the present invention; FIG. 5 is a perspective view of a steel reinforcement cage when the cross-sectional shape is rectangular according to an embodiment of the present invention; FIG. 6 is a perspective view of a steel reinforcement cage when the cross-sectional shape is circular according to an embodiment of the present invention; and FIG. 7 is a relative position diagram of a steel CS(corrugated steel)-Frame, a steel reinforcement cage, and a limiting clip according to an embodiment of the present invention. Detailed Description of the Preferred Embodiments

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.Embodiment one:

[0016] As shown in FIG. 1, the present invention provides a fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage, including a CS(corrugated steel)-Frame column 1 and a steel reinforcement cage 2; the steel reinforcement cage 2 is placed inside the CS(corrugated steel)-Frame column 1, and the concrete 3 is poured inside the CS(corrugated steel)-Frame column 1. The concrete 3 can be precast poured in the factory or poured on-site.

[0017] As shown in FIG. 2, the CS(corrugated steel)-Frame column 1 is a steel rod CS(corrugated steel)-Frame column, the steel rod CS(corrugated steel)-Frame column includes four solid steel rods 11 located at the corners, and the adjacent solid steel rods 11 are transversely arranged with corrugated webs 12. The steel reinforcement cage 2 adopts four longitudinal bars 21 and a plurality of stirrups 22 as described in FIG. 5, the four longitudinal bars 21 enclose a cuboid structure, and the plurality of stirrups 22 fix the longitudinal bars 21 at equal intervals around the height direction of the cuboid column, and the fixing method can be binding or welding.

[0018] In the embodiment, in order to facilitate the fixation of the steel reinforcement cage 2 at the on-site prefabrication stage, as shown in FIG. 7, a limiting clip 4 is respectively sleeved at the head end of the four longitudinal bars 21 of the steel reinforcement cage 2, and the limiting clip 4 is placed on the end of the corrugated web 12, and is just clamped at the four corners of the CS(corrugated steel)-Frame column 1 to achieve clamp positioning; then the concrete 3 is poured on site, and the steel reinforcement cage 2 is firmly positioned and is conveniently constructed.

[0019] The beneficial effect of the present invention is that: under the normal use condition without fire, the designed frame and the internal steel reinforced concrete 3 work together to bear axial force, bending moment and shearing force, and has good stress performance. Due to the internal steel reinforcement cage 2, the column still meets the structural stress requirements under fire conditions, considering that the frame doesn't work, Therefore, the column can meet the requirements of fire code without brushing fire retardant coating, achieve the technical effect of not brushing the fire retardant coating, and ensure the aesthetics of the outer surface of the column.

[0020] In addition, compared with the traditional fire-proof steel reinforcement column, the CS(corrugated steel)-Frame column with a built-in steel reinforcement cage of the present invention also has the technical effect of low transportation cost: Take the example of PC components exported from China to Europe to replace local ones: The most cost-effective "weight-to-peripheral volume ratio" for export shipping is 0.35 tons / m 3< for containers; 1 ton / m 3< for bulk; a) According to the experience of Hungary, steel structures are not used much because the fire resistance requirement of steel structures is strict and the price of fire retardant coating is very high. The price of fire retardant coating that can resist fire for 2 hours is RMB 480 yuan / m 2< ; for a 600*600mm column, the price of fire retardant coating is RMB 1,152 yuan / m 2< ; b) Steel rod CS(corrugated steel)-Frame column is suitable for ocean shipping and can replace PC column without fire retardant coating. c) PC columns in Hungary include installation of 800-900 euros / m 3< ; a PC column has a length of 10 m, a cross-section of 0.6 m * 0.6 m and a volume of 3.6 m 3< ; in accordance with the 800 euros / m 3< , the price of a PC column is 3,060 euros, equivalent to RMB 24,480 yuan. Unit price per meter = 0.6*0.6*850 euros * 8 (exchange rate) = RMB 2,448 yuan / m;

[0021] When the steel rod CS(corrugated steel)-Frame column is adopted, because of the appropriate increase in the amount of steel, the cross-section is changed to 0.5 m * 0.5 m, 45 mm * 45 mm of square steel rods are adopted by steel profiles, the thickness of corrugated plate is 2.0 mm; longitudinal bar is 4d16, and stirrup is d8@200. The combined weight of the steel CS(corrugated steel)-Frame and the square steel rods is 95.3 kg, equivalent to 381 kg / m 3< , suitable for sea transportation. According to the shipping unit price of 23,000 / container; a container contains 16 pieces or 15 tons; the freight cost is 1,500 yuan. Assuming the export sales price is 10,000 / ton; the installation fee is 2,000 yuan / ton; the local price of concrete is 160 euros / m 3< , then the unit price of this column is: 95.3 kg * (10 for materials + 2 for installation + 1.5 for freight) + 0.5 * 0.5 cross-sectional area * (1280 for materials + pouring) = RMB 1,607 yuan / m, saving 35% cost than PC column.

[0022] It can be seen that the CS(corrugated steel)-Frame column with a built-in steel reinforcement cage of the present invention is very suitable for exporting to overseas markets, and has low cost and high economy.Embodiment two:

[0023] As shown in FIG. 3, the other structure of embodiment two is the same as that of embodiment one, except that the corner of the CS(corrugated steel)-Frame column adopts an angle steel profile 11, and the angle steel profile 11 is concentric square-shaped, and the cost of steel is relatively low.Embodiment three:

[0024] As shown in FIG. 4, the other structure of embodiment three is the same as that of embodiment one, except that the corner of the CS(corrugated steel)-Frame column adopts an angle steel profile 11, and the angle steel profile 11 is L-shaped, and the cost of steel is relatively low.Embodiment four:

[0025] As shown in FIG. 6, the other structure of embodiment four is the same as that of embodiment one, except that the longitudinal bars 21 of the steel reinforcement cage encloses a cylindrical structure, and the stirrups 22 adopt a spiral structure. The stress structure and integrity are better.

[0026] The above are merely preferred embodiments of the present invention and do not limit the present invention in any way. Any equivalent replacement or modification of the technical solutions and technical contents disclosed in the present invention by any person skilled in the art within the scope of the technical solutions of the present invention is considered to be the content of the technical solutions of the present invention, and is still within the scope of protection of the present invention.

Claims

1. A fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage, comprising a CS(corrugated steel)-Frame column and a steel reinforcement cage; the steel reinforcement cage being placed inside the CS(corrugated steel)-Frame column, and the concrete being poured inside the CS(corrugated steel)-Frame column .

2. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 1, wherein the CS(corrugated steel)-Frame column is a steel rod CS(corrugated steel)-Frame column, the steel rod CS(corrugated steel)-Frame column comprising four solid steel rods located at the corners, with corrugated side panels arranged transversely between the adjacent solid steel rods.

3. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 1, wherein all four corners of the CS(corrugated steel)-Frame column adopt angle steel profiles, and the angle steel profiles are L-shaped or concentric square-shaped.

4. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 1, wherein the steel reinforcement cage has a rectangular or circular cross-section.

5. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 4, wherein the steel reinforcement cage is composed of longitudinal bars and stirrups, and a plurality of the longitudinal bars are arranged at equal intervals to form a circular or square longitudinal bar column, and are fixed by binding or welding of the stirrups.

6. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 5, wherein the number of the longitudinal bars is not less than four.

7. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 5, wherein a plurality of the longitudinal bars are arranged at equal intervals from the vertical direction of the longitudinal bar column or are spirally fixed outside the longitudinal bar column.

8. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 1, wherein the steel reinforcement cage and the CS(corrugated steel)-Frame column are positioned by means of a limiting clip; the limiting clip is sleeved on the longitudinal bar and then clamped between four corner steel pipes of the CS(corrugated steel)-Frame column.

9. The fire retardant coating-free CS(corrugated steel)-Frame column with a built-in steel reinforcement cage according to claim 1, wherein the concrete is poured on site.

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