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.
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The LVL design is carried out with the add-on modules for timber design that are available for RFEM 5 or RSTAB 8.
The following steps are necessary for the design:
For modeling columns, bottom ribs, top ribs, and so on, you can use members for timber panels covered on one side.
If the timber panel is covered on both sides, we recommend replacing the members with surfaces. The columns are hinged to the top and the bottom rib. Then, you can define the covering.
For timber surfaces, make sure that the orthotropic material model is used.
When defining supports, you can decide whether they should be linear or nonlinear.
The flexibility of the connection between the covering and the members can be set using line releases. The springs refer to a length of 1 meter (kN/m/m = kN/m²), which is why the displacement modulus of the fastener must be multiplied by the number of fasteners per linear meter.
In the video, you can see the exact procedure. It shows the results first, then the modeling.
You can control the intervals of isolines using the panel.
To customize the values and color scale, double-click the color range in the panel. It is possible to determine the intervals directly by specifying the numeric value. As an alternative, you can specify the upper and lower extreme values for covering the color range. Click [Fill] to interpolate and automatically fill the numeric values for the individual intermediate values of the color range.
You can save the user-defined value scale by clicking [Save] and giving it an appropriate name.
If you apply a moving load from the library of load models, you can specify the "thickness of dispersal layer" and "angle of dispersal" (see Image 01). Based on these entries, RF‑MOVE Surfaces determines the length and width of the rectangular surfaces and generates free surface loads.
As an alternative, if you have entered concentrated loads as moving loads, you can right-click the free concentrated load and convert it into a surface load using the corresponding option in the shortcut menu (see Image 02). There are also parameters for controlling the load width.