A cantilevered "butterfly" shaped spiral stair structure

Abstract

The utility model discloses a kind of cantilevered "butterfly" shape rotary stair structure, rotary stair above layer platform centerline is symmetrically arranged in two sides with axis, central structure wall is several interval arranged arc wall body, top between adjacent wall body is connected as a whole through center connecting beam, several stair cantilevered beams one end is connected with central structure wall, the other end is outwardly projected, arc ladder section is laid between adjacent stair cantilevered beams;Upper layer platform includes platform beam and platform floor slab, platform beam is set in the two sides of upper layer platform, the end away from main body is connected with central structure wall, platform floor slab is laid between two sides platform beam.The utility model is reasonable in structure, modeling is beautiful, and high in comfort, not only improve the overall safety of stair, but also improve the utilization rate of space under ladder section, satisfy personnel traffic or other functional requirements.

Description

Technical Field

[0001] This utility model relates to the field of architecture, and in particular to a cantilevered "butterfly" shaped spiral staircase structure. Background Technology

[0002] Existing stadiums, exhibition halls, museums, and other buildings often feature outdoor corridors or platforms due to functional requirements. To enhance the aesthetic appeal of the architecture, an increasing number of buildings connect the ground level and outdoor platforms via outdoor spiral staircases. These spiral staircases have become a highlight and key design element of the building, thus requiring a lightweight and fluid design that accommodates pedestrian traffic beneath the staircases, often necessitating the absence of columns beneath the staircase sections. Furthermore, these staircases are characterized by complex shapes, high torque, and large spans. As a crucial traffic hub within the building, the staircase structure must possess sufficient safety features, thus placing high demands on its structural design.

[0003] How to meet the architectural design requirements while ensuring the safety and comfort of the staircase has become an urgent problem to be solved. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cantilevered "butterfly" shaped spiral staircase structure that does not require columns while meeting the safety requirements of the staircase, facilitates pedestrian passage under the staircase, and has a compact structure, large rotation angle, small rotation radius, high comfort, and beautiful appearance, thereby overcoming the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a cantilevered "butterfly" shaped spiral staircase structure, including an upper platform and a spiral staircase; The spiral staircase is symmetrically arranged on both sides of the upper platform with the center line of the upper platform as the axis. The spiral staircase includes a central structural wall, a central connecting beam, a staircase cantilever beam, and an arc-shaped stair section. The central structural wall consists of several spaced arc-shaped walls. The tops of adjacent walls are connected by a central connecting beam, forming a spiraling cylindrical structure together with the central structural wall and the central connecting beam. Several stair cantilever beams are connected to the central structural wall at one end and cantilevered outward at the other end. Arc-shaped stair sections are laid between adjacent stair cantilever beams. The upper platform includes platform beams and platform floor slabs. The platform beams are located on both sides of the upper platform, with the end furthest from the main body connected to the central structural wall. The platform floor slabs are laid between the two platform beams.

[0006] As an improvement of this utility model, the end of the platform beam near the main structure is connected to the corbel of the main structure through a sliding support.

[0007] Furthermore, the planar projection of the cylinder formed by the central structural wall and the central connecting beam is a circle, an ellipse, or an irregular shape formed by connecting segmented arcs of different radii.

[0008] Furthermore, secondary walls may be constructed between the central structural walls, or the spaces may be left empty.

[0009] Furthermore, the cantilever beam of the staircase adopts a variable cross-section.

[0010] Furthermore, the spiral staircase also includes a revolving platform, which is connected between two arc-shaped stair sections. The height of the stair cantilever beams at the revolving platform is consistent, and the stair cantilever beams at the arc-shaped stair sections are located at the beginning and end.

[0011] Furthermore, the aforementioned cantilevered "butterfly" shaped spiral staircase structure also includes an inter-floor platform and a straight stair section. The inter-floor platform is connected to both sides of the spiral staircase, and the straight stair section is laid between the inter-floor platform and the ground, and is connected to the staircase starting foundation.

[0012] With this design, the present invention has at least the following advantages.

[0013] 1. The central structural wall and the central connecting beam together form a cylindrical structure, which can effectively balance the bending moment transmitted by the cantilever beam of the staircase. Without columns or other vertical components on the outer ring of the staircase, it has sufficient safety and meets the needs of people passing under the staircase.

[0014] 2. The spiral staircase has a compact overall structure, a large rotation angle, a small rotation radius, high comfort, and strong space adaptability.

[0015] 3. The overall shape is shaped like a butterfly, making it aesthetically pleasing.

[0016] 4. The structure has a reasonable stress distribution and is easy to construct, making it suitable for widespread application. Attached Figure Description

[0017] The above is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, the following describes this utility model in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Fig. 1 This is a three-dimensional structural schematic diagram of the present invention from a first angle.

[0019] Fig. 2 This is a three-dimensional structural schematic diagram of the present invention from a second angle.

[0020] Fig. 3 This is a schematic diagram of the upper planar structure of this utility model.

[0021] Fig. 4 This is a schematic diagram of the lower planar structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Upper platform; 11. Platform beam; 12. Platform floor slab; 2. Spiral staircase; 21. Central structural wall; 22. Central connecting beam; 23. Staircase cantilever beam; 24. Curved stair section; 25. Revolving platform; 3. Inter-floor platform; 4. Straight stair section; 5. Staircase starting foundation; 6. Main structural corbel; 7. Sliding support; 8. Main structure. Detailed Implementation

[0023] Please see Figs. 1 to 4 This utility model provides a cantilevered "butterfly" shaped spiral staircase structure, suitable for outdoor landscape staircases of 1-3 floors, including an upper platform 1 and a spiral staircase 2.

[0024] The upper platform 1 includes two platform beams 11 and a platform floor 12. The platform beams 11 are located on both sides of the upper platform 1. The end away from the main structure 8 is connected to the central structural wall 21, and the end closer to the main structure 8 is connected to the main structural bracket 6 through a sliding support 7. The platform floor 12 is laid between the platform beams 11 to form the upper platform 1.

[0025] In this embodiment, a sliding support 7 is provided between the platform beam 11 and the main structure corbel 6. Its function is to separate it from the main structure 8, so as to avoid the impact of the external irregular staircase on the shock absorption effect of the main structure 8 during an earthquake. It can also avoid setting structural columns at the beam end, provide more functional options for the building space under the platform, and improve the aesthetics of the building.

[0026] The dimensions of the main structural bracket 6 and the sliding amount of the sliding support 7 should be calculated using a three-dimensional model, taking into account the displacement difference between the two at the connection point under a major earthquake. The sliding amount of the sliding support 7 should not be less than the calculated displacement difference, and the dimensions of the main structural bracket 6 should not be less than the dimensions of the sliding support 7 plus twice the sliding amount.

[0027] It should be noted that the corbel 6 and sliding support 7 are the only measures to separate the platform beam 11 from the main structure 8. In other embodiments, structural columns may be installed at the end of the platform beam 11 near the main structure 8, provided that the architectural design and function permit.

[0028] The spiral staircase 2 is symmetrically arranged on both sides of the upper platform 1 with the center line of the upper platform 1 as the axis. The spiral staircase 2 includes a central structural wall 21, a central connecting beam 22, a staircase cantilever beam 23, an arc-shaped stair section 24, and a rotating platform 25.

[0029] The central structural wall 21 consists of several spaced arc-shaped walls. The tops of adjacent walls are connected by a central connecting beam 22, so that the central structural wall 21 and the central connecting beam 22 together form a spiraling cylindrical shape, which constitutes the inner ring of the spiral staircase 2.

[0030] The planar projection of the cylindrical body formed by the central structural wall 21 and the central connecting beam 22 is a circle, an ellipse, or an irregular shape formed by connecting segmented arcs of different radii.

[0031] It should be noted that the central structural wall 21 is the only vertical component in this utility model and plays a major supporting role. Secondary walls can be built between adjacent central structural walls 21, i.e., under the central connecting beam 22, or they can be left empty. The secondary walls do not serve a supporting role; they are merely decorative walls.

[0032] One end of the stair cantilever beam 22 is connected to the central structural wall 21, and the other end protrudes outward. The stair cantilever beam 22 is the main horizontal component of the spiral staircase 2, providing horizontal support for the curved stair section 24 and the turning platform 25. To achieve a light and smooth aesthetic effect on the outer edge of the staircase, the stair cantilever beam 22 is a variable cross-section beam, and a continuous retaining wall is constructed at the cantilever end of the stair cantilever beam 22, forming the outer ring of the spiral staircase 2.

[0033] The curved stair section 24 and the rotating platform 25 are both laid between the stair cantilever beams 22. The rotating platform 25 connects the upper and lower curved stair sections 24 to form a large-angle, small-radius rotation. The stair cantilever beams 22 located at the rotating platform 25 have the same height, while the stair cantilever beams 22 located at the curved stair sections 24 are set at both ends.

[0034] In this embodiment, an inter-floor platform 3 is also provided, which is connected to the lower arc-shaped stair section 24 of the spiral staircases 2 on both sides. A straight stair section 4 is laid between the inter-floor platform 3 and the ground, and the straight stair section 4 is connected to the staircase starting foundation 5.

[0035] This utility model has a reasonable structure, beautiful appearance, and high comfort. It not only improves the overall safety of the staircase, but also increases the utilization rate of the space under the staircase, meeting the needs of personnel passage or other functions.

[0036] 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 changes or alterations made by those skilled in the art using the above-disclosed technical content shall fall within the protection scope of the present utility model.

Claims

1. A projecting "butterfly" shaped spiral staircase structure, characterized in that, Includes an upper platform and a spiral staircase; The spiral staircase is symmetrically arranged on both sides of the upper platform with the center line of the upper platform as the axis. The spiral staircase includes a central structural wall, a central connecting beam, a staircase cantilever beam, and an arc-shaped stair section. The central structural wall consists of several spaced arc-shaped walls. The tops of adjacent walls are connected by a central connecting beam, forming a spiraling cylindrical structure together with the central structural wall and the central connecting beam. Several stair cantilever beams are connected to the central structural wall at one end and cantilevered outward at the other end. Arc-shaped stair sections are laid between adjacent stair cantilever beams. The upper platform includes platform beams and platform floor slabs. The platform beams are located on both sides of the upper platform, with the end furthest from the main body connected to the central structural wall. The platform floor slabs are laid between the two platform beams.

2. A cantilevered "butterfly" shaped spiral stair structure according to claim 1, wherein The end of the platform beam closest to the main structure is connected to the corbel of the main structure via a sliding support.

3. A cantilevered "butterfly" shaped spiral stair structure according to claim 1, wherein The planar projection of the cylindrical body formed by the central structural wall and the central connecting beam is an irregular shape, such as a circle, an ellipse, or segments of arcs with different radii connected together.

4. A cantilevered "butterfly" shaped spiral stair structure as claimed in claim 1, wherein, The central structural walls may be replaced by secondary walls or left vacant.

5. A cantilevered "butterfly" shaped spiral stair structure as claimed in claim 1, wherein, The cantilever beam of the staircase has a variable cross-section.

6. A cantilevered "butterfly" shaped spiral stair structure as claimed in claim 1, wherein, The spiral staircase also includes a revolving platform, which is connected between two arc-shaped stair sections. The height of the stair cantilever beams at the revolving platform is consistent, and the stair cantilever beams at the arc-shaped stair sections are located at the beginning and end.

7. A cantilevered "butterfly" shaped spiral stair structure as claimed in claim 1, wherein, It also includes inter-floor platforms and straight stair sections. The inter-floor platforms are connected to the spiral staircases on both sides, and the straight stair sections are laid between the inter-floor platforms and the ground, and are connected to the starting foundation of the staircases.

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