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The subject of the design is a steel-glass structure of an interior spiral staircase. The staircase is an important architectural detail of the interior. Because of this, the structural design closely followed the architectural requirements with great emphasis on the detail purity. The interior spiral staircase is located inside an educational, training, and rehabilitation center in the city of Zlín, Czech Republic.
Structural Analysis: KONSTAT s.r.o. | www.konstat.cz
Architectural design: CUBE DESIGN s.r.o. | www.cubedesign.sk
Structural Analysis: KONSTAT s.r.o. | www.konstat.cz
Architectural design: CUBE DESIGN s.r.o. | www.cubedesign.sk
Steel Spiral Staircase
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Customer Project / View Only
| Number of Nodes | 743 |
| Number of Lines | 476 |
| Number of Members | 268 |
| Number of Surfaces | 74 |
| Number of Load Cases | 1 |
| Total Weight | 1.479 tons |
| Dimensions (Metric) | 6.179 x 6.112 x 6.936 m |
| Dimensions (Imperial) | 20.27 x 20.05 x 22.76 feet |
| Program Version | 5.24.01 |
Length: 01:05:28 min
Length: 00:00:48 min
Length: 00:00:55 min
Length: 00:00:40 min
Length: 00:00:25 min
Length: 00:01:27 min
Length: 00:01:37 min
Length: 00:01:25 min
Length: 00:01:35 min
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In the default setting, the cross-section class for each member and load case is determined automatically in the design modules. In the input window of the cross sections, however, the user can also specify the cross-section class manually; for example, if local buckling is excluded by the design.
In EN 1993-1-1, the General Method was introduced as a design format for stability analyses that can be applied to planar systems with arbitrary boundary conditions and variable structural height. The design checks can be performed for loading in the main load-bearing plane and simultaneous compression. The stability cases of lateral-torsional buckling and flexural buckling are analyzed from the main supporting plane; that is, about the weak component axis. Therefore, the issue often arises as to how to design, in this context, flexural buckling in the main load-bearing plane.
For the stability design of members and sets of members with a uniform cross-section, you can use the equivalent member method according to EN 1993-1-1, 6.3.1 to 6.3.3. However, as soon as a tapered cross-section is available, this method can no longer be used, or only used to a limited extent. The RF-/STEEL EC3 add-on module can automatically recognize these cases and switch to the general method.
In the case of open cross-sections, the torsional load is removed mainly via secondary torsion, since the St. Venant torsional stiffness is low compared to the warping stiffness. Therefore, warping stiffeners in the cross-section are particularly interesting for the lateral-torsional buckling analysis, as they can significantly reduce the rotation. For this, end plates or welded stiffeners and sections are suitable.
In the Stress-Strain Analysis add-on, you can use the option to specify sign-dependent limit stresses by stress component.
Get a better understanding of the stress distribution within member cross-sections by using clipping planes.
The deformation process of the global deformation components can be represented as a movement sequence.
The results of solid stresses can be displayed as colored 3D points in the finite elements.
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Is it possible to perform stability analysis according to EN 1993‑1‑1 in RSECTION 1?
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