A corrugated steel tube concrete column

Abstract

The present invention discloses a corrugated steel tube concrete column, comprising a polygonal cavity formed by alternately connecting flanges of a plurality of steel sections and a plurality of corrugated steel plates, wherein the corrugation direction of the corrugated steel plates is the same as the length direction of the polygonal cavity, the number of sides of the polygonal cavity is an even number and the interior of the polygonal cavity is filled with concrete, and the corrugated steel plates and steel sections can be used to work in coordination to give full play to the superior performance of both, thereby overcoming the difficulty of complex connection nodes of traditional steel tube concrete columns due to the small wall thickness of the steel tube, reducing the cost of engineering node connection, and the steel section rigidity of the corrugated steel tube concrete column is large, and the cross-sectional rigidity can be flexibly adjusted by adjusting the steel section distance, thereby facilitating engineering applications with different lateral rigidity requirements.

Description

Technical Field

[0001] The invention relates to the field of construction, and in particular to a corrugated steel tube concrete column. Background Art

[0002] On the one hand, steel tube concrete has good mechanical properties because its steel tube can constrain the lateral deformation of the core concrete and the concrete can delay the buckling of the steel tube. On the other hand, its pouring does not require formwork, which can improve construction efficiency and reduce construction costs. Therefore, steel tube concrete is increasingly widely used in medium and high-rise buildings, industrial plants and bridge structures. The traditional rectangular steel tube concrete has a smaller out-of-plane steel plate and its constraint effect on the core concrete is not as strong as that of circular steel tube concrete. In order to improve the constraint effect of rectangular steel tubes, my country's composite structure design specifications require that the height-to-width ratio of the cross-section of rectangular steel tube concrete should not be greater than 2. In addition, due to the thin wall thickness of the steel tube, the steel tube cannot be directly welded to the steel beam to prevent the steel tube from tearing. At present, the main node forms of steel tube concrete use two connection methods: inner diaphragm and inner diaphragm, and the node structure and construction are relatively complicated. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a corrugated steel tube concrete column, which can utilize corrugated steel plates and steel sections to work together to give full play to the superior performance of both, overcome the problem of traditional steel tube concrete columns with complex connection nodes due to the small wall thickness of the steel tube, reduce the cost of engineering node connection, and the corrugated steel tube concrete column has high steel section stiffness. The cross-sectional stiffness can be flexibly adjusted by adjusting the steel section distance, which is convenient for engineering applications with different lateral stiffness requirements.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a corrugated steel tube concrete column, comprising a polygonal cavity composed of a plurality of flanges of steel sections and a plurality of corrugated steel plates connected alternately, wherein the corrugation direction of the corrugated steel plates is the same as the length direction of the polygonal cavity, the cross-sectional form of the steel sections is a steel section of any cross-section with more than one plane flange, including a flat steel plate form, the interior of the polygonal cavity is filled with concrete, the webs of the steel sections are all placed inside the polygonal cavity, the thickness of the steel section flange plate is not less than 8 mm, and the ratio of the flange plate width to thickness is not greater than Where fyk is the standard value of the tensile strength of the steel flange.

[0006] Preferably, the material of the steel section is killed steel, with a strength grade not lower than Q235 and a quality grade not lower than B grade.

[0007] Preferably, the thickness of the corrugated steel plate is not less than 1 mm, and the corrugation form is one of sinusoidal corrugation, triangular corrugation, rectangular corrugation or trapezoidal corrugation.

[0008] Preferably, the concrete is one of ordinary concrete, recycled concrete and high-performance concrete, and its strength grade is not less than C30.

[0009] Preferably, the cross-section of the polygonal cavity is a closed cross-section with a width of not less than 120 mm, and the number of steel sections and corrugated steel plates is determined according to the number of sides of the polygonal cavity.

[0010] Preferably, the steel section may be one of T-type, π-type, H-type, or a combination of two or more thereof.

[0011] The beneficial effects of the present invention are:

[0012] 1) The steel and corrugated steel sheets form a fence-like combination effect. The steel has large axial bearing capacity and rigidity, while the corrugated steel sheets have low axial bearing capacity but strong circumferential constraint. The combination of the two has a strong reinforcing constraint effect on the filled concrete. At the same time, the combination of corrugated steel sheets and concrete can improve the axial stability of the steel. Therefore, the combined use of steel, corrugated steel sheets and concrete can make the best use of the strengths of the three materials and avoid their weaknesses, giving play to the "1+1+1>3" combination effect, fully utilizing the mechanical properties of the materials, saving materials, and achieving significant economic benefits.

[0013] 2) The bonding performance between corrugated steel plate and concrete is excellent, which can ensure good cooperative working performance between steel and concrete;

[0014] 3) The steel flange of the corrugated steel tube concrete is easy to connect with the steel beam, which overcomes the problem of complex connection nodes of traditional steel tube concrete columns due to the small wall thickness of the steel tube, and reduces the cost of engineering node connection;

[0015] 4) The steel section stiffness of the corrugated steel tube concrete column is large, and the section stiffness can be flexibly adjusted by adjusting the steel section distance, which is convenient for engineering applications with different lateral stiffness requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a corrugated steel tube concrete column provided in Embodiment 1 of the present invention;

[0018] Figure 2A schematic diagram of the structure of a corrugated steel tube concrete column provided in the second embodiment of the present invention;

[0019] Figure 3 This is a schematic structural diagram of a corrugated steel tube concrete column provided in Example 3 of the present invention.

[0020] Description of reference numerals:

[0021] 1. Steel section; 2. Corrugated steel plate; 3. Concrete. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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] Embodiment 1, as Figure 1 A corrugated steel tube concrete column is an octagonal cross-section corrugated steel tube concrete column, which is composed of four steel sections 1 and four corrugated steel plates 2. The steel sections 1 are respectively two π-shaped steels, a T-shaped steel and an H-shaped steel. The flanges of the steel sections 1 and the sinusoidal corrugated steel plates 2 alternately form the sides of the octagonal cross-section corrugated steel tube concrete column. The corrugation direction of the corrugated steel plates 2 is the same as the length direction of the octagonal cavity (that is, the crest direction is perpendicular to the length of the octagonal cavity), and then ordinary concrete 3 is filled in the octagonal cavity to form a column.

[0024] The manufacturing method is as follows: processing steel sections and corrugated steel plates according to design dimensions, placing four steel sections 1 and four corrugated steel plates 2 alternately, welding the flanges of the steel sections 1 and the corrugated steel plates 2 to form an octagonal cavity, and then filling the octagonal cavity with ordinary concrete 3 to form a column.

[0025] Embodiment 2, as Figure 2 A corrugated steel tube concrete column is a rectangular cross-section corrugated steel tube concrete column, which is composed of two steel sections 1 and two corrugated steel plates 2. The steel section 1 is a T-shaped steel. The flange of the steel section 1 and the corrugated steel plates 2 with trapezoidal corrugations alternately form the side of the rectangular cross-section corrugated steel tube concrete column. The direction of the corrugated steel plates 2 is the same as the length direction of the rectangular cavity. Ordinary concrete 3 is then filled in the rectangular cavity to form a column.

[0026] The manufacturing method is as follows: processing steel sections and corrugated steel plates according to design dimensions, placing two steel sections 1 and two corrugated steel plates 2 alternately, welding the flanges of the steel sections 1 and the corrugated steel plates 2 to form a rectangular cavity, and then filling the rectangular cavity with recycled concrete 3 to form a column.

[0027] Embodiment 3, as Figure 3A corrugated steel tube concrete column has a trapezoidal cross-section and is composed of two steel sections 1 and two corrugated steel plates 2. The steel sections 1 are H-shaped steel and π-shaped steel respectively. The flanges of the steel sections 1 and the rectangular corrugated steel plates 2 alternately form the sides of the trapezoidal cross-section corrugated steel tube concrete column. The direction of the corrugated steel plates 2 is the same as the length direction of the trapezoidal cavity. High-performance concrete 3 is then filled in the trapezoidal cavity to form a column.

[0028] The manufacturing method is as follows: processing steel sections and corrugated steel plates according to design dimensions, placing two steel sections 1 and two corrugated steel plates 2 alternately, welding the flanges of the steel sections 1 and the corrugated steel plates 2 to form a trapezoidal cavity, and then filling the trapezoidal cavity with high-performance concrete 3 to form a column.

[0029] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A corrugated steel tube concrete column, characterized in that: The invention comprises a polygonal cavity formed by alternately connecting flanges of a plurality of steel sections (1) and a plurality of corrugated steel plates (2), wherein the corrugation direction of the corrugated steel plates (2) is the same as the length direction of the polygonal cavity, the cross-sectional form of the steel section (1) is a steel section (1) of any cross-sectional form including a flat steel plate form having more than one plane flange, the interior of the polygonal cavity is filled with concrete (3), the webs of the steel section (1) are all placed inside the polygonal cavity, the thickness of the flange plate of the steel section (1) is not less than 8 mm and the ratio of the width of the flange plate to its thickness is not greater than , where fyk is the standard value of tensile strength of steel flange; The thickness of the corrugated steel plate (2) is not less than 1 mm, and the corrugation form is one of sinusoidal corrugation, triangular corrugation, rectangular corrugation or trapezoidal corrugation; the cross-sectional form of the polygonal cavity is a closed cross-section with a width of not less than 120 mm; The steel section (1) is selected from one of T-section, π-section, and H-section, or a combination of two or more thereof.

2. The corrugated steel tube concrete column according to claim 1, characterized in that: The material of the steel section (1) is killed steel, with a strength grade not lower than Q235 and a quality grade not lower than Grade B.

3. The corrugated steel tube concrete column according to claim 1, characterized in that: The concrete (3) is selected from one of ordinary concrete, recycled concrete or high-performance concrete, and its strength grade is not less than C30.

4. The corrugated steel tube concrete column according to claim 1, characterized in that: The number of the steel sections (1) and the corrugated steel plates (2) is determined according to the number of sides of the polygonal cavity.

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