Why does my calculation in the RF‑/ALUMINUM add‑on module take so long?

Answer

By 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.

Keywords

Calculation time Calculation duration Aluminum design

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RSTAB Steel and Aluminium Structures
ALUMINUM 8.xx

Add-on Module

Design of aluminium members according to Eurocode 9

Price of First License
1,480.00 USD
RFEM Steel and Aluminium Structures
RF-ALUMINUM 5.xx

Add-on Module

Design of aluminium members according to Eurocode 9

Price of First License
1,480.00 USD