Skylight of the Ritz Hotel in Madrid, Spain
Customer Project
The Ritz Hotel is a 5-star luxury hotel located in Madrid. It was built by King Alfonso XIII in 1910 as a royal hotel. After more than 100 years in service, it is currently undergoing complete renovation.
| Architect |
Rafael de La-Hoz Madrid, Spain www.rafaeldelahoz.com |
| Structural Analysis and Construction |
Bellapart Les Preses, Catalonia, Spain www.bellapart.com |
Model
The renovation includes the construction of a large new skylight above the main hall. The skylight's design is inspired by the original design, which was covered with an opaque slab in previous renovations.
The skylight consists of two different parts: the Lower Hall, a vault shape with a length of 42.97 ft and a width of 28.87 ft, and the High Hall, a trapezoidal dome with spherical corners of approximately 39.04 ft x 43.96 ft. It is crowned by a 3-foot-high pyramid of which the sides measure approximately 16 x 16 ft.
The structure consists of slender steel welded T-sections and small rectangular plates connecting the main beams and providing complete four-side supports of the glass panels. The glass panels work together structurally by providing stability to the slender sections at the four corners of the dome. A rigid tension ring all along the perimeter is obtained by welded RHS beams and a visible cable completing the dome’s ring. The rectangular pyramid on top of the dome is both a compression ring for the planar loads and a Vierendeel beam for the vertical loads. The structural members are welded between them in order to obtain a complete moment connection without visual impact.
The stability of the structure is verified considering the warping torsional degree of freedom, second-order effects, and global and local imperfections.
Project Location
Mandarin Oriental Ritz Hotel,Pl. de la Lealtad, 5, 28014 Madrid
Spain
Keywords
Skylight Glass ceiling Steel structure Stability
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Evaluating and Documenting Steel Joints Analysis Results in RFEM 6
With the RFEM 6 add-on Steel Joints, you can analyze steel connections by using an FE model. This article demonstrates how to evaluate and document the steel joints analysis results.
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Application of Connections to the Structure | Steel Joints
- The proposed connection can be applied to all selected nodes in the structure
- The location of the connection can be defined using the "Main" tab of the Add-on dialog box
- The design is performed for all connections in the structure and after the calculation, the results on all connections can be displayed
- The table shows the results for the individual connections, each connection is designed and can be saved separately
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How do I set a release for warping?
- How can I define a warping spring or a warping restraint?
- At which point on a cross-section are the supports and loads assumed for the calculation with warping torsion?
- The limit stress is activated, but my stress ratio is “non-designable” in the Stress-Strain Analysis add-on. What could be the reason?
- How can I deactivate the 7th degree of freedom for certain members or cross-sections only?
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- How can I define a warping spring or a warping restraint?
