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Dipl.-Ing. (FH) Alexander Meierhofer
2021-03-24

KB 000682 | B-Spline Surfaces

Instead of a quadrangular surface, you can use a B‑spline surface. The shape of this can be adjusted retrospectively, using the integrated help nodes. Depending on the necessary surface complexity, you can create a B‑spline surface with 3 x 3 or 4 x 4 help nodes.

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Knowledge Base Articles
KB 001925 | AISC Fillet Weld Design in RFEM 6
The weld stresses between surfaces can be determined using the Stress-Strain Analysis add-on in RFEM 6. Furthermore, the stress limit determined according to the applicable standard can be input to determine the stress ratio of the weld. This article focuses on the fillet weld design according to AISC 360-22 [1] with two examples from AISC Volume 1: Design Examples [2].
Export options for RFEM 6 to DXF file are displayed in a clear interface layout.
This article provides a detailed overview of the export features from RFEM 6 and RSTAB 9 to AutoCAD/DXF files, including options for exporting dimensions, FE meshes, and deformed shapes.
The image displays the AutoCAD DXF import settings in RFEM 6.
This article provides a detailed overview of the import features from RFEM 6 and RSTAB 9 to AutoCAD/DXF files.
Modell eines Stahlbetonbalkens, der durch Kriechen und Schwinden beeinflusst wird
This technical article addresses the direct deformation analysis of reinforced concrete beams considering the long-term effects of creep and shrinkage. The direct calculation according to Eurocode 2 (EN 1992-1-1, Section 7.4.3) is explained using a single-span beam. Particular emphasis is placed on tension stiffening, behavior in the cracked state based on the distribution factor (damage parameter), and consideration of shrinkage and creep behavior.
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Product Features
Definition of Line Weld

In RFEM 6, it is possible to define line welds between surfaces and to calculate the weld stresses by using the Stress-Strain Analysis add-on.

The following joint types are available:

  • Butt Joint
  • Corner Joint
  • Lap Joint
  • Tee Joint

Depending on the selected joint type, you can select the following weld types:

  • Single Square
  • Double Square
  • Double Bevel
  • Single V
  • Double V
  • Single U
  • Double U
  • Single J
  • Double J
Snow Load Wizard with options for snow overhang and snow guard according to Eurocode.

In the Snow Load Wizard, you can optionally consider snow overhang and snow guard when generating snow loads according to Eurocode.

Die Bauzustandsanalyse ermöglicht die Anpassung von Eigenschaften wie Stäben und Flächen in verschiedenen Bauphasen.

The Construction Stages Analysis (CSA) add-on allows you to modify the object and design properties of members, surfaces, and so on, in the individual construction stages.

Display of model deformations in the analysis progress window of the program.

During the calculation, you can display the model deformation for the calculation steps graphically in the calculation progress window.

Frequently Asked Questions (FAQ)
How can I change the display size of formulas in the result details?
Why are the stresses of the structural analysis different from those calculated with the Stress-Strain Analysis add-on?
The limit stress is activated, but my stress ratio is “non-designable” in the Stress-Strain Analysis add-on. What could be the reason?
Is it possible to display the deformation analysis of a surface (limit 0.5‰)?

Can I use Dlubal API in Rhino and Grasshopper?

In the Steel Joints add-on, I get high utilization ratios for preloaded bolts in the tension design. Where do these high utilization ratios come from and how can I evaluate the load-bearing reserves of the bolt?
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