The structural analysis software RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as to model solid and contact elements.
RSTAB 9 is a powerful analysis and design software for 3D beam, frame, or truss structure calculations, reflecting the current state of the art and helping structural engineers meet requirements in modern civil engineering.
Do you often spend too long calculating cross-sections? Dlubal Software and the RSECTION stand-alone program facilitate your work by determining section properties of various cross-sections and performing a subsequent stress analysis.
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The stability design checks according to EN 1999‑1‑1, 6.3, are not included in RSECTION 1.
According to EN 1999‑1‑1, 5.2.2 (5) a), the stability analysis may be performed as a cross-section design, provided that a spatial calculation according to the second-order analysis is performed while applying global and local imperfections. In order to model the lateral-torsional buckling, it is necessary to determine the internal forces according to the geometrically nonlinear torsional buckling analysis with regard to warping torsion. It is only necessary to perform the section design, as all stability effects are covered by the calculation.
In RSECTION 1, you can calculate the stresses due to the axial force, biaxial bending moments and shear forces, primary and secondary torsional moment, as well as warping bimoment for any cross-section shape. This way, you can use the design method described in EN 1999‑1‑1, 5.2.2 (5) a) in RSECTION 1.
Using the Effective Sections (Extension for RSECTION 1) add-on, you can also perform a classification and calculate the effective cross-section according to EN 1999‑1‑1.
In the RSECTION program, you can analyze general steel or aluminum cross-sections and determine the effective section properties. For this, you need the Effective Sections program extension of RSECTION. If you have licensed this add-on, you can activate the Effective Section option for the calculation in the Base Data of the cross-section.
Then, define the standard according to which the calculation should be performed. Currently, the following options are available:
The effective section properties depend on the internal forces of the cross-section. Therefore, create a load case and define one or more internal force constellations.
After the calculation, the effective section properties are displayed in the table. In the graphic, you can check the stresses on the effective section.
Once you have saved the cross-section, you can import it into RFEM or RSTAB to use it for further analyses.
The webinar Determination of Section Properties and Stress Analysis in RSECTION shows the modeling and calculation of a cold-formed section. You can find further information there.