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Dipl.-Ing. (FH) Andreas Hörold
2019-12-03

CP 001155 | CanopyMarquiTM Luxury Camping Tent, USA

CP|001155

In 2009, Under Canvas started its all-inclusive adventure package for glamping, a type of luxury camping. It has since grown to include eight luxury glamping resorts and a customized event offering, bringing the glamping experience to life anywhere in the country.

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Knowledge Base Articles
Warping Restraint via End Plate
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.
Structural Model
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.
Single-Span Beam with Lateral and Torsional Restraint and Without Intermediate Support
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.
Lateral Buckling of Single-Span Beam
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.
Screenshots
Product Features
Feature 002843 | Dimensioning with Result Function

For design objects, you can optionally display sags or extreme results.

Export RFEM or RSTAB Models to *.glb or *.glTF Format

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" .

Activation of Camera Flight Mode in RFEM

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.

"Update only Materials, Thicknesses, and Cross-Sections" Export Option

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.

Frequently Asked Questions (FAQ)

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?
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