| Structural Engineering | Ingenieurbüro Neulichedl & Partner I-39012 Merano, Schafferstraße 37 Tel 0039 0473 238041 Fax 0039 0473 258392 E-mail: neulichedl@rolmail.net |
| Investor | Autonomous Province of Bolzano, Italy |
Aviary in the Gardens of Trauttmansdorff Castle in Meran, Italy
The cylindrical steel structure of the aviary consists of an upper column in the form of an inclined spoked wheel and a base with anchoring spans as an observation platform.
More about the Gardens of Trauttmansdorff Castle: www.trauttmansdorff.it
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Knowledge Base
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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.
The previous article Lateral-Torsional Buckling in Timber Construction | Examples 1 explains the practical application for determining the critical bending moment Mcrit or the critical bending stress σcrit for a bending beam's lateral-torsional buckling by using simple examples. In this article, the critical bending moment is determined by considering an elastic foundation resulting from a stiffening bracing.
The article titled Lateral-Torsional Buckling in Timber Construction | Theory explains the theoretical background for the analytical determination of the critical bending moment Mcrit or the critical bending stress σcrit for the lateral buckling of a bending beam. This article uses examples to verify the analytical solution with the result from the eigenvalue analysis.
Slender bending beams that have a large h/w ratio and are loaded parallel to the minor axis tend to have stability issues. This is due to the deflection of the compression chord.
For design objects, you can optionally display sags or extreme results.
RFEM and RSTAB models can be saved as 3D glTF models (*.glb and *.glTF formats). View the models in 3D in detail with a 3D viewer from Google or Babylon. Take your VR glasses, such as Oculus, to "walk" through the structure.
You can integrate the 3D glTF models into your own websites using JavaScript according to the instructions (as on the Dlubal website Models to Download): "Easily display interactive 3D models on the web & in AR" .
With the Camera Fly Mode view option, you can fly through your RFEM and RSTAB structure. Control the direction and speed of the flight with your keyboard. Additionally, you can save the flight through your structure as a video.
The direct interface with Revit allows you to update the Revit model according to the changes you have made in RFEM or RSTAB. Depending on the modification, the Revit objects may have to be regenerated (deleting the object and subsequent regeneration). The regeneration is performed on the basis of the RFEM/RSTAB model.
If you want to avoid this regeneration, activate the check box 'Update only materials, thicknesses, and sections'. In this case, only the properties of the objects will be adjusted. Changes different from those in material, surface thickness, and section are, however, not considered in this case.
I have defined a pre-deformation in RSTAB. When FE‑LTB imports the loads, why not also the imperfection?
What are the options in RFEM 5 or RSTAB 8 for determining the ideal elastic critical moment for lateral-torsional buckling for any cross-sections and systems/loads? Is it also possible to design flat steel (brackets, flat steel stringers of staircases)?
Is it possible to integrate several sections with different materials in the flexural buckling analysis, or how can I apply several sections together?
I calculated a frame according to the second-order analysis. The testing engineer says that the frame is not stable, as the torsional buckling check should failed. What do I have to be aware of in the case of the second-order analysis? What modules do I need for a lateral-torsional buckling analysis?
For my NVIDIA graphics card, I need to select between a driver from the "Production Branch" and a "New Feature Branch." Which driver is best suited for RFEM/RSTAB?
Why do the min/max values of the total displacement not match the deformations when working with result combinations?
