In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
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AnswerBy default, the computation kernel of the cross-section program SHAPE‑THIN is used in the RF‑/ALUMINUM add‑on module to determine the stresses of the effective cross-section in an iterative procedure. This method is precise as all corners and edges of the cross-section are covered, but can be very time-consuming in the case of compound cross-sections.As an alternative, it is possible to determine the effective cross-section by using the simplified analytical method (see Figure 01), which is significantly faster. In the case of using this approach, the corners, roundings, and others, are neglected and then compensated by a factor. No iterative calculation is performed. Therefore, the effective cross-section values might be higher than with the SHAPE‑THIN calculation.In such a case, it is recommended to carry out the calculation using the analytical method and then to only design the governing structural component with the governing load combination by using the SHAPE‑THIN solution.
AnswerThe add-on module RF- / EL-PL is only designed for the elastic-plastic dimensioning concept of steel cross-sections. As a result, only materials from the category "Steel" can be calculated in the module.
The very time-consuming design in STEEL EC3 and Aluminum can be caused by the cross-sections of the "General" type.
These can be seen in Window 1.3 Cross-Sections. For these cross-sections, it is necessary to calculate the stresses for the cross-section classification with SHAPE‑THIN in the background. The result combination (RC) for the design may contain a lot of load combinations (CO), which is why the SHAPE‑THIN calculation is performed very often and takes a very long time. However, there is a workaround. With the option shown in the second figure, the enveloping internal forces of the RC are used, and not every CO contained in the RC is calculated. Although this may be more conservative, it is faster because not every CO requires the SHAPE‑THIN calculation, but only the envelope.
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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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