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

Answer

By default, the compute core 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 because all vertices and edges of the cross-section are considered, but can be very time-consuming for complex sections.
 
Alternatively, it is possible to determine the effective cross-section by means of a simplified analytical method (see Figure 01) that runs much faster. Using that approach, corners, roundings, etc. are neglected and subsequently compensated by a factor. No iterative calculation is performed. Therefore, the effective cross-section values may be higher than with the SHAPE-THIN calculation.

In such a case, it is recommended to carry out the calculation with the analytical method and then to design only the governing structural component with the governing load combination by means of 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