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001051
2020-09-01
Restoration of Consolation Chapel in Lugo, Spain
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The old roof structure of the chapel from 1690 attached to the old St. Peter's Church was supported by beams that were inserted into holes in the masonry.

Over time, the lower vault of the structure deteriorated to the point of limiting access to the interior, so restoration was necessary.

Technical Office and Timber Works
Maderas Besteiro S.L.
Lugo, Spain
www.mbesteiro.com

3D model of a roof structure in RFEM (© Maderas Besteiro S.L.)
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Timber Roof Structure

No Download Possible Customer Project / View Only
Number of Nodes 228
Number of Lines 280
Number of Members 107
Number of Surfaces 21
Number of Load Cases 5
Number of Load Combinations 31
Number of Result Combinations 4
Total Weight 10.893 tons
Dimensions (Metric) 17.386 x 8.612 x 3.762 m
Dimensions (Imperial) 57.04 x 28.25 x 12.34 feet
Program Version 5.06.30
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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

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

Feature 002423 | Displaying Results in Solids

The results of solid stresses can be displayed as colored 3D points in the finite elements.

Improved Calculation Performance by Optimized Consideration of Nodal Degrees of Freedom in RFEM

The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.

This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (for example, trusses and membrane structures).

Extended Display of Surface Strains

Display extended strains of members, surfaces, and solids (for example, the important principal strains, equivalent total strains, and so on) in the Project Navigator - Results in RFEM as well as in Table 4.0.

For example, you can display governing plastic strains when performing the plastic design of connections with surface elements.

Frequently Asked Questions (FAQ)
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?

Where can I find the update reports for RFEM 5, RSTAB 8, SHAPE-THIN, SHAPE-MASSIVE, RX-TIMBER, CRANEWAY, PLATE-BUCKLING, COMPOSITE-BEAM?

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?
Is it possible to quickly evaluate whether the mesh used is fine enough?
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