Arc flange multi-chamber steel beam

Abstract

The utility model discloses an arc flange multi-chamber steel beam, including steel beam body, its characterized in that, steel beam body is by a plurality of steel sheet welding into the box room structure with inner chamber, and the inner chamber is by the bulkhead and constitutes a plurality of independent chambers, and the chamber includes first chamber and second chamber, and the first chamber is located in the middle part, and the second chamber is distributed in the both sides of first chamber, and the top surface of steel beam body is concave arc shape, and the bottom surface of steel beam body has upper recess in the middle part, and the both sides of upper recess are inclined surface. The utility model can improve the bending performance and support stability of steel beam, and realizes artistic effect with structural member itself simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology, specifically to an arc-flange multi-cell steel beam, which is particularly suitable for the support system of urban landscape buildings (such as umbrella-shaped steel structures). Background Technology

[0002] In recent years, urban landscape architecture (such as umbrella-shaped cantilever structures) has increasingly demanded higher aesthetic standards for steel beams. Current technology typically uses single-cell steel beams, then covers them with decorative materials such as aluminum panels to achieve the desired artistic effect. However, this split design of "structure + decoration" has significant drawbacks:

[0003] (1) Insufficient stiffness of steel beams: They are prone to bending and have insufficient support stability.

[0004] (2) Separation of decoration and structure: External decorative materials (such as aluminum plates) increase the weight of components and construction complexity, and are prone to falling off or aging, affecting durability and aesthetic performance.

[0005] (3) Material waste: The separation of the decorative layer and the structural layer leads to redundant material usage, which violates the concept of green building.

[0006] This invention solves the aforementioned problems by designing the steel beam as a multi-chamber structure, thereby improving the bending resistance and support stability of the steel beam, integrating decorative functions into the structural components, and directly utilizing the pleated surface of the steel to enhance performance and aesthetics. Utility Model Content

[0007] The purpose of this invention is to provide a multi-chamber steel beam with an arc-shaped flange, which improves the bending resistance and support stability of the steel beam, while achieving an artistic effect through the structural components themselves.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0009] An arc-shaped flange multi-chamber steel beam includes a steel beam body, which is a box structure with an inner cavity welded from multiple steel plates. The inner cavity is composed of multiple independent chambers formed by partitions. The chambers include a first chamber and a second chamber. The first chamber is located in the middle, and the second chambers are distributed on both sides of the first chamber. The top surface of the steel beam body is a concave arc shape, and the bottom surface of the steel beam body has an upper groove in the middle, with inclined surfaces on both sides of the upper groove.

[0010] In this design, the concave arc-shaped structure on the top surface of the steel beam can more evenly distribute the load and reduce local stress concentration. Under vertical loads, the optimized geometry of the arc-shaped top surface makes the bending moment distribution smoother, thereby improving bending stiffness. The internal cavity of the steel beam body is divided into multiple independent chambers by diaphragms, reducing the width-to-thickness ratio of the plates and effectively suppressing local buckling of the steel plates and maximizing the post-buckling strength of the plates. The diaphragms not only enhance the overall stability of the steel beam but also effectively resist shear deformation and improve torsional stiffness. The groove in the middle of the bottom surface reduces the self-weight of the structure, while the sloping design on both sides creates a "pressure arch" effect when the steel beam is under compression, further dispersing stress and improving compressive stability. The arc-shaped flanges reduce stress abrupt change points through smooth transition, reducing the risk of fatigue crack initiation at welded joints. The multi-chamber structure distributes stress to multiple chambers, avoiding premature failure due to stress concentration in a single chamber. Compared to solid-web steel beams, multi-cell designs significantly reduce material usage while maintaining the moment of inertia of the cross section. By optimizing the spacing between partitions and the thickness of the steel plates, steel usage can be reduced by 10%-20% while meeting the load-bearing requirements.

[0011] Meanwhile, the grooves and slopes on the bottom surface of the steel beam form a pleated skin, which is directly formed from the structural steel plate, eliminating the need for external decorations such as aluminum plates, reducing the cost of decorative materials by more than 20%, and simplifying the construction process. In terms of architectural appearance, the concave and convex pleats (such as arc-shaped and rectangular recesses) can be used as a decorative layer, eliminating the need for additional decorative materials, reducing the amount of decorative materials used, and lowering the component's self-weight by 15%, meeting green building standards. The pleated skin also acts as a stiffening structure, reducing the width-to-thickness ratio of the plates and suppressing the risk of buckling.

[0012] Optionally, the steel beam body is welded together from a top plate, side plates, a middle bottom plate, and side bottom plates. The top plate is concave arc-shaped, the side plates are distributed on both sides of the top plate, the side plates are parallel to the partitions, the two ends of the side bottom plates are connected to the partitions and the side plates respectively, and the two ends of the middle bottom plate are connected to the partitions.

[0013] Optionally, two partitions and two side bottom plates are provided. The two partitions are located between the two side plates. The upper ends of the two partitions are welded to the bottom surface of the top plate, and the lower ends of the two partitions are welded to both ends of the middle partition. The two partitions, the middle bottom plate, and the top plate form a first chamber.

[0014] Optionally, one end of the side bottom plate is welded to the bottom end of a side plate on one side, and the other end is welded to the bottom end of an adjacent partition plate, with the side bottom plate, partition plate, side plate, and top plate forming a second chamber.

[0015] Optionally, the two partitions are located on either side of the lowest point of the concave top plate.

[0016] Optionally, the two side bottom plates are arranged in a V-shape.

[0017] Optionally, the cross-sectional area of ​​the first chamber is smaller than that of the second chamber, the cross-section of the second chamber is a parallelogram, and the cross-section of the first chamber is a rectangle with a concave top.

[0018] Optionally, the second chambers are symmetrically distributed about the vertical centerline of the first chamber.

[0019] Optionally, triangular reinforcing plates are welded to the four corners of the first chamber and the second chamber.

[0020] The beneficial effects of this utility model are:

[0021] In this invention, the concave arc-shaped structure on the top surface of the steel beam can distribute the load more evenly and reduce local stress concentration. Under vertical load, the arc-shaped top surface, through geometric optimization, makes the bending moment distribution more gradual, thereby improving the bending stiffness.

[0022] The inner cavity of the steel beam body is divided into multiple independent chambers by partitions, which reduces the width-to-thickness ratio of the plates, effectively suppresses local buckling of the steel plates and maximizes the post-buckling strength of the plates.

[0023] The partition not only enhances the overall stability of the steel beam, but also effectively resists shear deformation and improves torsional stiffness. The groove in the middle of the bottom surface reduces the structure's self-weight, while the sloping design on both sides creates a "compression arch" effect when the steel beam is under pressure, further dispersing stress and improving compressive stability.

[0024] The curved flanges reduce stress abruptness points through smooth transition, lowering the risk of fatigue crack initiation at welded joints. The multi-chamber structure distributes stress across multiple chambers, preventing premature failure due to stress concentration in a single chamber. Compared to solid-web steel beams, the multi-chamber design significantly reduces material usage while maintaining the section moment of inertia. By optimizing the diaphragm spacing and steel plate thickness, steel consumption can be reduced by 10%-20% while meeting load-bearing requirements.

[0025] The grooves and slopes on the bottom surface of the steel beam form a pleated skin, which is directly formed from the structural steel plate, eliminating the need for external decorative panels such as aluminum plates, reducing the cost of decorative materials by more than 20%, and simplifying the construction process. In terms of architectural appearance, the concave and convex pleats (such as arc-shaped and rectangular recesses) can be used as a decorative layer, eliminating the need for additional decorative materials, reducing the amount of decorative materials used, and lowering the component's self-weight by 15%, meeting green building standards. The pleated skin also acts as a stiffening structure, reducing the width-to-thickness ratio of the plates and suppressing the risk of buckling. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0028] Figure 3 This is a structural diagram of a steel beam body applied to an umbrella-shaped structure.

[0029] Figure 4 This is a structural diagram of an irregularly shaped steel column that connects to the main steel beam.

[0030] Reference numerals: 1-Steel beam body, 2-Top plate, 3-Side plate, 4-Partition plate, 5-First chamber, 6-Second chamber, 7-Intermediate bottom plate, 8-Side bottom plate, 9-Upper groove, 10-Reinforcing plate, 11-Groove, 12-Umbrella-shaped structure, 13-Irregular steel column. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0032] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example

[0035] A multi-chamber steel beam with an arc-shaped flange includes a steel beam body 1. The steel beam body 1 is made of multiple steel plates welded into a box structure with an inner cavity. The inner cavity is composed of multiple independent chambers formed by partitions 4. The chambers include a first chamber 5 and a second chamber 6. The first chamber 5 is located in the middle, and the second chambers 6 are distributed on both sides of the first chamber 5. The top surface of the steel beam body 1 is concave arc shape, and the bottom surface of the steel beam body 1 has an upper groove 9 in the middle, with inclined surfaces on both sides of the upper groove 9.

[0036] In this embodiment, as Figure 1 and Figure 2As shown, the concave arc-shaped structure on the top surface of the steel beam can more evenly distribute the load and reduce local stress concentration. Under vertical loads, the optimized geometry of the arc-shaped top surface makes the bending moment distribution smoother, thereby improving the bending stiffness. The inner cavity of the steel beam body 1 is divided into multiple independent chambers by the partition plate 4, reducing the width-to-thickness ratio of the plates and effectively suppressing local buckling of the steel plates and maximizing the post-buckling strength of the plates. The partition plate 4 not only enhances the overall stability of the steel beam but also effectively resists shear deformation and improves torsional stiffness. The groove 9 in the middle of the bottom surface reduces the self-weight of the structure, while the sloping design on both sides creates a "pressure arch" effect when the steel beam is under compression, further dispersing stress and improving compressive stability. The arc-shaped flange reduces stress abrupt change points through smooth transition, reducing the risk of fatigue crack initiation at welded joints. The multi-chamber structure disperses stress to multiple chambers, avoiding premature failure due to stress concentration in a single chamber. Compared to solid-web steel beams, multi-cell designs significantly reduce material usage while maintaining the moment of inertia of the cross section. By optimizing the spacing of the diaphragms and the thickness of the steel plates, the amount of steel used can be reduced by 10%-20% while meeting the load-bearing requirements.

[0037] Meanwhile, the grooves 11 and inclined surfaces on the bottom surface of the steel beam body 1 form a pleated skin. This pleated skin is directly formed from the structural steel plate, eliminating the need for external decorations such as aluminum plates, reducing the cost of decorative materials by more than 20%, and simplifying the construction process. In terms of architectural appearance, the concave and convex pleats (such as arc-shaped and rectangular recesses) can be used as a decorative layer, eliminating the need for additional decorative materials, reducing the amount of decorative materials used, and lowering the component's self-weight by 15%, meeting green building standards. The pleated skin also acts as a stiffening structure, reducing the width-to-thickness ratio of the plates and suppressing the risk of buckling.

[0038] In this embodiment, as Figure 3 and Figure 4 As shown, the steel beam body 1 generally serves as the connection of the upper part of the umbrella structure 12 and bears a large load. The lower end of the umbrella structure 12 is generally an irregular steel column 13. The upper groove 9 is also set to correspond to the groove 11 on the irregular steel column 13 to form a smooth transition after connection.

[0039] Furthermore, the steel beam body 1 is welded together from a top plate 2, side plates 3, a middle bottom plate 7, and a side bottom plate 8. The top plate 2 is in the shape of a concave arc. The side plates 3 are distributed on both sides of the top plate 2. The side plates 3 are parallel to the partition plate 4. The two ends of the side bottom plate 8 are connected to the partition plate 4 and the side plates 3, respectively. The two ends of the middle bottom plate 7 are connected to the partition plate 4.

[0040] Specifically, the top plate 2 (concave arc shape) directly bears the vertical load. The arc shape design optimizes the stress distribution through geometric shape and reduces local concentration. Compared with the flat top plate 2, the arc top plate 2 has a more uniform stress distribution under bending moment, which can reduce the peak stress by 20%-30% and delay the initiation of fatigue cracks.

[0041] Furthermore, both the partition plate 4 and the side bottom plate 8 are provided with two pieces. The two partition plates 4 are located between the two side plates 3. The upper ends of the two partition plates 4 are welded to the bottom surface of the top plate 2, and the lower ends of the two partition plates 4 are welded to both ends of the middle partition plate 4. The two partition plates 4, the middle bottom plate 7, and the top plate 2 form the first chamber 5.

[0042] Furthermore, one end of the side base plate 8 is welded to the bottom end of the side plate 3 on one side, and the other end is welded to the bottom end of the adjacent partition plate 4. The side base plate 8, the partition plate 4, the side plate 3, and the top plate 2 form a second chamber 6.

[0043] Specifically, two partitions 4 are located between the two side plates 3, with their upper ends welded to the bottom surface of the top plate 2 and their lower ends welded to both ends of the middle bottom plate 7, forming a vertical force transmission path. The two side bottom plates 8 are arranged obliquely or in a stepped shape, with one end welded to the bottom end of the side plate 3 and the other end welded to the bottom end of the adjacent partition 4, dividing the inner cavity into the first chamber 5 and the second chamber 6.

[0044] The middle base plate 7 is flat and welded to the lower ends of the partition plates 4 at both ends, forming the first chamber 5 together with the top plate 2 and the partition plates 4. The side base plates 8, side plates 3, and partition plates 4 form the second chamber 6. The top plate 2 is concave and arc-shaped, serving as the main pressure-bearing area. The arc-shaped geometry disperses stress and reduces local stress concentration. The first chamber 5 and the second chamber 6 together enhance the overall torsional stiffness. The upper groove 9 is formed by the bottom surface of the middle base plate 7 and the inner surfaces of the partition plates 4 on both sides.

[0045] Furthermore, the two partitions 4 are located on both sides of the lowest point of the concave top plate 2.

[0046] Furthermore, the two side bottom plates 8 are arranged in a V-shape.

[0047] Furthermore, the cross-sectional area of ​​the first chamber 5 is smaller than that of the second chamber 6. The cross-section of the second chamber 6 is a parallelogram, while the cross-section of the first chamber 5 is a rectangle with a concave top.

[0048] Furthermore, the second chamber 6 is symmetrically distributed about the vertical centerline of the first chamber 5.

[0049] Furthermore, triangular reinforcing plates 10 are welded to the four corners of the first chamber 5 and the second chamber 6.

[0050] Specifically, such as Figure 2As shown, the corners of the chamber are areas of geometric abrupt change, which are prone to stress concentration under load. The triangular plate disperses the concentrated stress over a larger area, reducing the stress peak at the corners. The hypotenuse of the triangular plate and the chamber wall panel form a "diagonal tie rod" effect, improving the shear resistance of the joint and reducing local deformation. The triangular plate constrains the local buckling of the chamber wall panel through out-of-plane stiffness, thereby improving the bending stiffness of the joint. In the second chamber 6, the triangular plate and the inclined side bottom plate 8 form a "space truss" system, suppressing the wall panel deformation caused by torsion and improving the torsional stiffness.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A multi-cell steel beam with arc-shaped flanges, comprising a steel beam body (1), characterized in that, The steel beam body (1) is made of multiple steel plates welded into a box structure with an inner cavity. The inner cavity is composed of multiple independent chambers formed by partitions (4). The chambers include a first chamber (5) and a second chamber (6). The first chamber (5) is located in the middle, and the second chamber (6) is distributed on both sides of the first chamber (5). The top surface of the steel beam body (1) is concave arc shape, and the bottom surface of the steel beam body (1) has an upper groove (9) in the middle, with inclined surfaces on both sides of the upper groove (9).

2. The arc-shaped flange multi-cell steel beam according to claim 1, characterized in that, The steel beam body (1) is welded together from a top plate (2), side plates (3), a middle bottom plate (7), and a side bottom plate (8). The top plate (2) is concave arc-shaped. The side plates (3) are distributed on both sides of the top plate (2). The side plates (3) are parallel to the partition plate (4). The two ends of the side bottom plate (8) are connected to the partition plate (4) and the side plate (3) respectively. The two ends of the middle bottom plate (7) are connected to the partition plate (4).

3. The arc-shaped flange multi-cell steel beam according to claim 2, characterized in that, The partition (4) and the side bottom plate (8) are each provided in two pieces. The two partitions (4) are located between the two side plates (3). The upper ends of the two partitions (4) are welded to the bottom surface of the top plate (2), and the lower ends of the two partitions (4) are welded to both ends of the middle partition (4). The two partitions (4), the middle bottom plate (7), and the top plate (2) form the first chamber (5).

4. The arc-shaped flange multi-cell steel beam according to claim 2, characterized in that, One end of the side bottom plate (8) is welded to the bottom end of the side plate (3) on one side, and the other end is welded to the bottom end of the adjacent partition (4). The side bottom plate (8), the partition (4), the side plate (3), and the top plate (2) form a second chamber (6).

5. A multi-cell steel beam with an arc-shaped flange according to claim 3, characterized in that, The two partitions (4) are located on both sides of the lowest point of the concave top plate (2).

6. A multi-cell steel beam with an arc-shaped flange according to claim 3, characterized in that, The two side bottom plates (8) are arranged in a V-shape.

7. The arc-shaped flange multi-cell steel beam according to claim 1, characterized in that, The cross-sectional area of ​​the first chamber (5) is smaller than that of the second chamber (6). The cross-section of the second chamber (6) is a parallelogram, while the cross-section of the first chamber (5) is a rectangle with a concave top.

8. A multi-cell steel beam with an arc-shaped flange according to claim 7, characterized in that, The second chamber (6) is symmetrically distributed with the vertical centerline of the first chamber (5) as the axis.

9. A multi-cell steel beam with an arc-shaped flange according to claim 8, characterized in that, Triangular reinforcing plates (10) are welded to the four corners of the first chamber (5) and the second chamber (6).

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