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001967
2021-05-03
Model ID 1967 | FT702p-plg-a | Bowstring Truss
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Bowstring truss (parabolic - flat bottom chords).Input via total length (L), first and last bays (L1) and middle bays (L2).

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FT702p-plg-a | Bowstring Truss

Block parameters editable dynamically
Number of Nodes 12
Number of Lines 21
Number of Members 21
Number of Surfaces 0
Number of Solids 0
Number of Load Cases 1
Number of Load Combinations 0
Number of Result Combinations 0
Total Weight 1.392 tons
Dimensions (Metric) 12,000 x 3,000 x 0,000 m
Dimensions (Imperial) 39.37 x 9.84 x 0 feet

You can download this structural model to use it for training purposes or for your projects. However, we do not assume any guarantee or liability for the accuracy or completeness of the model.

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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.
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Product Features
Feature 002843 | Dimensioning with Result Function

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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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