Square steel tube with inner break angle and anti-sliding steel tube concrete column with inner break angle

Abstract

The utility model discloses a square steel tube with an inbreak angle and an anti-slip concrete filled steel tubular column with the inbreak angle, which relate to the field of constructional engineering, and comprise the square steel tube with the inbreak angle, the square steel tube with the inbreak angle is built together through a plurality of single sections, and the upper end face and the lower end face of the built square steel tube are closed along with the shape. And the concrete is poured into the inner cavity of the square steel tube with the inner break angle and is bonded into a whole. The steel pipe concrete column is ingenious in conception and reasonable in layout, and the folded inner folding angle can play a better role in restraining concrete in the column, so that relative slippage between the steel pipe and the concrete at the inner folding angle is effectively reduced, and the overall stress performance of the steel pipe concrete column is improved.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering, in particular to a square steel pipe with an internal folding angle and a concrete-filled steel pipe column with an internal folding angle and anti-slip performance. Background Technique

[0002] In a conventional concrete-filled steel pipe column, relative slip is very likely to occur between the steel pipe and the concrete, and the relative slip at the column corners is particularly significant. The relative slip makes it impossible for the steel pipe and the concrete to coordinate in force and deformation, seriously damaging the mechanical properties of the concrete-filled steel pipe column. The engineering solution to this problem is to set stud bolts on the inner wall of the steel pipe, which can strengthen the synergy between the steel pipe and the concrete in the concrete-filled steel pipe column to a certain extent and effectively improve the bearing capacity and deformation capacity of the column. However, due to the limited space between the inner wall of the outer steel pipe and the internal core concrete, especially at the column corners, this will inevitably complicate the construction process and increase the difficulty of construction quality control.

[0003] Therefore, the utility model develops a brand-new square steel pipe with an internal folding angle and a concrete-filled steel pipe column with anti-slip performance. By folding the four corners of the square steel pipe inward and pouring and bonding it with the concrete, the stud bolts set on the inner wall of the steel pipe are replaced. The design of the internal folding angle can significantly reduce the relative slip between the steel pipe and the concrete at the corners. Content of the Utility Model

[0004] The purpose of the utility model is to provide a square steel pipe with an internal folding angle and a concrete-filled steel pipe column with an internal folding angle and anti-slip performance, so as to solve the problems of limited internal space and complex construction process when the prior art uses stud bolts to improve the bonding strength between the steel pipe and the concrete.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A square steel pipe with an internal folding angle of the utility model includes multiple segments with inwardly folded corners, and the multiple segments are vertically stacked together to form the square steel pipe body.

[0007] Preferably, each segment is folded from a single structural unit. The upper and lower boundaries of the segment are set as squares, and the middle cross-section of the segment is a square, and the side length of the square is set as b.

[0008] Preferably, the shape of the single structural unit is a planar rectangular structure, and the planar rectangular structure is formed by A 0 C 0 、C 0 C 0 、C 0 A 0 、A 0 A 0It is formed by connecting four line segments in sequence. The length of the planar rectangular structure is 4b and the width is a; the two ends of the planar rectangular structure are marked as A 0 , E, C 0 from top to bottom along the width direction. There are four diamond-shaped creases in the planar structure along the length direction. The four diamond-shaped creases are of the same size and symmetrically distributed; when unfolded, the diamond-shaped creases are folded into inner folding angles with a folding angle of θ.

[0009] Preferably, the angle θ of the inner folding angle 101 is specifically

[0010] Preferably, the intersections of the upper end of the planar rectangular structure from left to right are marked as A 0 , A, B, C, D, A 0 , and the intersections of the lower end from left to right are marked as C 0 , A 1 , B 1 , C 1 , D 1 , C 0 , and the intersections of the middle section from left to right are marked as E, F, G, H, E in sequence; among them, the length of AE and EC 0 is the same, both being a / 2; the lengths of AA, CA 0 , DA 0 , D 0 , C 1 are all b / 2; the lengths of AB, BC, CD, AB 0 , B 1 , C 0 , D 1 , B 1 , B 1 , C 1 , C 1 , D 1 are all b; the widths of the middle diamond-shaped creases EF, FG, GH, HE are all b; the length b and the length a satisfy

[0011] A concrete-filled steel tubular column with anti-slip inner folding angles is composed of the square steel tubes with inner folding angles as described above. The square steel tubes with inner folding angles are stacked together by multiple single segments, and the upper and lower end faces after stacking are conformally closed. Concrete is poured into the inner cavity of the square steel tubes with inner folding angles and bonded into one body.

[0012] Preferably, the concrete completely fills the inner cavity of the square steel tubes with inner folding angles.

[0013] Compared with the prior art, the beneficial technical effects of the present utility model are:

[0014] The utility model relates to a square steel pipe with an internal folding angle and a concrete-filled steel pipe column with an internal folding angle and anti-slip function. The square steel pipe with an internal folding angle is formed by stacking multiple single segments together, and the upper and lower end faces after stacking are closed conformally. Concrete is poured into the inner cavity of the square steel pipe with an internal folding angle and bonded into one body. Among them, a single segment is folded by a single structural unit according to a set folding line position.

[0015] The utility model has ingenious conception and reasonable layout. Multiple segments are stacked together to form a square steel pipe with an internal folding angle, and then it is made into a concrete-filled steel pipe column through concrete filling and pouring. The folded internal folding angle can play a better constraint role on the concrete in the column, thereby effectively reducing the relative slip between the steel pipe and the concrete at the internal folding angle, improving the overall mechanical properties of the concrete-filled steel pipe column, and further enhancing its stability and firmness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model with reference to the drawings.

[0017] Figure 1 It is a schematic structural diagram of a concrete-filled steel pipe column with an internal folding angle and anti-slip function of the present utility model;

[0018] Figure 2 It is a schematic diagram of a single structural unit of the present utility model;

[0019] Figure 3 It is a top view of a single segment of the present utility model;

[0020] Figure 4 It is a schematic diagram of a single segment of the present utility model;

[0021] Figure 5 It is a schematic diagram of the internal folding angle after the single structural unit of the present utility model is folded into shape.

[0022] Description of reference numerals: 100, square steel pipe with an internal folding angle; 200, concrete; 11, segment; 111, single structural unit; 101, internal folding angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] As Figure 2-5 shown, a square steel pipe with an internal folding angle includes a plurality of segments 11 with inward folding angles, and the plurality of segments 11 are vertically stacked together to form the square steel pipe body.

[0025] Specifically, a single segment 11 is formed by folding a single structural unit 111. The upper and lower boundaries of the segment 11 are set as squares, and the middle cross-section of the segment 11 is a square, with the side length of the square set as b.

[0026] Among them, the shape of the single structural unit 111 is a planar rectangular structure, and the planar rectangular structure is formed by sequentially connecting four line segments A 0 C 0 、C 0 C 0 、C 0 A 0 、A 0 A 0 The length of the planar rectangular structure is 4b, and the width is a; the two ends of the planar rectangular structure are marked as A 0 、E、C 0 from top to bottom along the width direction. There are a total of four diamond creases along the length direction in the planar structure. The four diamond creases are of the same size and symmetrically distributed; when unfolded, the diamond creases are folded into inner folding angles 101 with a folding angle of θ.

[0027] Specifically, the angle θ of the inner folding angle 101 is specifically

[0028] The intersection points from left to right at the upper end of the planar rectangular structure are marked as A 0 、A、B、C、D、A 0 , and the intersection points from left to right at the lower end are marked as C 0 、A 1 、B 1 、C 1 、D 1 、C 0 , and the intersection points in the middle section from left to right are marked as E, F, G, H, E in sequence; among them, A 0 E and EC 0 are of the same length, both being a / 2; A 0 A, C 0 A 1 、DA 0 、D 1 C 0 have lengths of b / 2; AB, BC, CD, A 1 B 1 、B 1 C 1 、C 1 D 1 have lengths of b; the widths EF, FG, GH, HE of the middle diamond creases are all b; specifically, the length b and the length a satisfy

[0029] The folding method of the single structural unit 111 is as follows:

[0030] First, the planar rectangular structure is valley-folded at the line segments EF, FG, GH, and HE, and then peak-folded at the positions of the line segments AE, AF, A 1 E, A 1 F, BF, BG, B 1 F, B 1 G, CG, CH, C 1 G, C 1 H, DH, DE, D 1 H, D 1 E, and finally the two corresponding free edges A 0 EC 0 are connected. After folding, a single segment 11 is formed.

[0031] As Figure 1 shown, a concrete-filled steel tubular column with anti-slip internal folding angles is composed of square steel tubes with internal folding angles as described above. The square steel tube 100 with internal folding angles is stacked together by multiple single segments 11, and the upper and lower end faces after stacking are enclosed conformally. The concrete 200 is poured into the inner cavity of the square steel tube 100 with internal folding angles and bonded into one body.

[0032] Specifically, the concrete 200 completely fills the inner cavity of the square steel tube 100 with internal folding angles. During filling, appropriate vibration can be carried out to reduce internal air bubbles and improve the filling uniformity; the folded internal folding angles can play a better constraint role on the concrete in the column, thereby effectively reducing the relative slip between the steel tube and the concrete at the internal folding angles and improving the overall mechanical performance of the concrete-filled steel tubular column.

[0033] The construction process of the present invention is as follows:

[0034] In one specific embodiment,

[0035] First, a steel plate with a planar rectangular structure is prepared. The length of the single structural unit 111 is 240 mm, and the width is 45 mm, that is, b = 60 mm, a = 45 mm. Markings are made on the planar rectangular structure according to the design. The two ends are respectively marked as A 0 , E, C 0 from top to bottom along the width direction, and the intersection points at the upper end from left to right are respectively marked as A 0 , A, B, C, D, A 0 , and the intersection points at the lower end from left to right are respectively marked as C 0 , A 1 , B 1 , C 1 , D 1 , C 0, the intersection points of the middle section from left to right are marked as E, F, G, H, E in sequence;

[0036] Then, connect AE, AF, A 1 E, A 1 F, BF, BG, B 1 F, B 1 G, CG, CH, C 1 G, C 1 H, DH, DE, D 1 H, D 1 E. After the connection is completed, a total of four diamond crease lines are marked along the length direction in the planar structure;

[0037] Finally, for the folding operation, the steel plate of the planar rectangular structure is valley-folded at the EF, FG, GH, and HE line segments, and then peak-folded at the AE, AF, A 1 E, A 1 F, BF, BG, B 1 F, B 1 G, CG, CH, C 1 G, C 1 H, DH, DE, D 1 H, D 1 E line segment positions. Finally, connect the two corresponding free edges A 0 EC 0 , and a single segment 11 is formed after folding;

[0038] Among them, when unfolded, the folding angle at the diamond crease folding place is θ = 113.0°, and this θ is the inner folding angle 101.

[0039] In another specific embodiment,

[0040] Referring to the above steps for operation, when the length of the single structural unit 111 selected is 200 mm and the width is 50 mm, that is, b = 50 mm and a = 50 mm, the inner folding angle θ = 131.1°.

[0041] In the third embodiment,

[0042] Referring to the above steps for operation, when the length of the single structural unit 111 selected is 160 mm and the width is 50 mm, that is, b = 40 mm and a = 50 mm, the inner folding angle θ = 141.3°.

[0043] It can be seen from the above multiple embodiments that when the specific length and width change, the inner folding angle changes accordingly; according to actual needs, the size of the steel plate can be adjusted accordingly, and appropriate materials can be selected for corresponding operations.

[0044] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0045] The above-described embodiments are only descriptions of the preferred modes of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A square steel tube with an inner angle, characterized in that: It comprises a plurality of segments (11) with inwardly folded corners, wherein the plurality of segments (11) are stacked together vertically to form a square steel tube body; A single segment (11) is formed by folding a single structural unit (111), the upper and lower boundaries of the segment (11) are set to be a square, the middle cross section of the segment (11) is a square, and the side length of the square is set to b; The single structural unit (111) is in the shape of a planar rectangular structure, which is surrounded by four line segments A0C0, C0C0, C0A0, and A0A0 connected in sequence, with a length of 4b and a width of a; two ends of the planar rectangular structure are respectively marked as A0, E, and C0 from top to bottom along the width direction, and there are four diamond folds in the planar structure along the length direction, and the four diamond folds are of the same size and symmetrically distributed; when unfolded, the diamond folds are folded into an inner fold angle (101) with a folding angle of θ.

2. The square steel tube with inner corners according to claim 1, characterized in that: The angle θ of the inner fold angle (101) is specifically 3. The square steel tube with inner corners according to claim 2, characterized in that: The intersection points of the upper end of the planar rectangular structure from left to right are marked as A0, A, B, C, D, A0, respectively, the intersection points of the lower end from left to right are marked as C0, A1, B1, C1, D1, C0, respectively, and the intersection points of the middle section from left to right are marked as E, F, G, H, E, respectively; Among them, A0E and EC0 have the same length, both are a / 2; A0A, C0A1, DA0, D1C0 are all b / 2; AB, BC, CD, A1B1, B1C1, C1D1 are all b; the widths of the middle diamond folds EF, FG, GH, HE are all b; the length b and the length a satisfy 4. An anti-slip concrete-filled steel tube column with an inner angle, which is composed of the square steel tube with an inner angle according to any one of claims 1 to 3, characterized in that: The square steel tube (100) with an inner folded angle is stacked together by a plurality of single segments (11), and the upper end surface and the lower end surface after stacking are sealed in accordance with the shape. Concrete (200) is poured into the inner cavity of the square steel tube (100) with an inner folded angle and bonded together.

5. The anti-slip concrete-filled steel tube column with inner corners according to claim 4, characterized in that: The concrete (200) is completely filled in the inner cavity of the square steel tube (100) with an inner corner.

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