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Frequently Asked Questions (FAQ)
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This can be done by means of multiselection and the shortcut menu:
- Select the corresponding members.
- Right-click the selection, click Edit Member, see Figure 01.
- Assign the eccentricity, see Figure 02.
Any SHAPE‑THIN cross-section can be designed as follows:
- Stability and stress analysis with the RF‑/STEEL EC3 add-on module and the RF‑/STEEL Warping Torsion module extension, see Figure 01
- Generating surfaces from the cross-section (possible in RFEM only, see Figure 02), and a new definition of support and stress analysis of the newly created surfaces with RF‑STEEL Surfaces, if necessary, see Figure 03; under certain circumstances, a stability analysis with RF‑STABILITY for the surface model is reasonable, see Figure 04.
You can adjust the orientation of several different members or cross-sections at one by using multiselection in the following steps:
- Select the desired members.
- Use the shortcut menu of one of the objects to open the dialog box for editing members (see the figure).
- Define a new member rotation angle.
A trapezoidal hollow section can be defined in the cross-section library under the parametric thin-walled cross-sections (see Figure 01).
There are two options:
- Definition as a rib (a surface is required)
- Definition as a parametric massive floor beam cross-section, see Figure 01
The reinforcement of a cross-section can be applied as follows:
- Model the corresponding additional member.
- Divide the original and the new member at the same uniform distances, depending on where you want to connect (right-click the member → "Divide Member" option).
- Connect them by using rigid members/couplings, see Figure 01.
For a detailed display, it is useful to model a contact solid.
For this, it is first necessary to divide the channel section into surfaces (right-click the member → Generate Surfaces from Member). Then, the web surface or the surface of the channel section to be welded must be projected into the steel surface:
- Copy nodes and lines into the plane.
- Divide the steel surface using integrated lines (right-click the member → Divide Surface).
- Define null surfaces as boundary surfaces of the contact solid.
Figure 01 - Connection Using Contact Solid
In this case, the simplest solution is the connection between the member and the surface by means of rigid members at certain distances, see Figure 01.
If necessary, you can previously divide the member by right-clicking the member and selecting "Divide Member."
The offset point of a cross-section is used as a reference point to place the section in the cross-section. This point is highlighted in red in the cross-section graphic of the "Set Section" dialog box (Figure 01). The coordinates y and z refer to the centroid of the cross-section.
Another reference point can be selected by clicking one of the red nodes, or turquoise snap points can be defined. At this point, the section is "glued" to the pointer before it is finally set with a mouse click.
The clever selection of the cross-section offset point makes it easier to set the cross-section on elements. This is also demonstrated in the video. Please note that the cross-sections shown in the video are not yet connected to each other. How these can be connected is shown in FAQ 002389.
The cross-sections created in SHAPE‑THIN 8 cannot be designed in RF‑/STEEL Cold-Formed Sections according to EN 1993‑1‑3 and EN 1993‑1‑5.
However, the cold-formed sections modeled in SHAPE‑THIN 9 can be designed in RF‑/STEEL Cold-Formed Sections.
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Wind Simulation & Wind Load Generation
With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.
The generated wind loads acting on these objects can be imported to RFEM or RSTAB.
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