FAQ 002395 EN 12 February 2019

Markus Baumgärtel Modeling | Loading RFEM RSTAB

Is there a possibility to effectively limit or reduce the number of the generated load combinations?

Answer

The problem of the generated load combinations is the variety of mathematical possibilities. The most important mechanisms for the effective reduction include:

  1. Reducing the number of load cases
  2. Restricting actions by alternative or grouped exclusion criteria (for example, wind in y does not act with wind in x or wind in +x does not act with wind in -x) (see Figure 01) 
  3. Assigning imperfections to load cases (for example, imperfection +x never with wind -x or imperfection +x never with wind +y) 

In this way, the generated load combinations can be significantly reduced in most cases.

Another important possibility is to use load or result combinations. In the case a purely linear structure, it is possible to use result combinations. Thus, only the load cases included in the result combination are calculated. All combinations can then be carried out with the results of these load cases.

The last possibility is to use the integrated automated reduction of load cases (see Figure 02). The relatively extensive features are described in the articles that you can access under Links below.

Keywords

reduction reduce load cases reduce load combinations number of load combinations

Links

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