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Combinations

The load combinations are used for the mutual action of different load cases. The description of any combination contains the list of included load cases including corresponding load case factors and combination factors. The combination factors may be obtained from load cases characteristics (design standard "EN 1990") or specified manually (other design standards).

The combinations are divided into particular tables according to their application. These tables are organized into tabs in the bottom frame. Following tabs are available:

1st order combination ULS

  • The fundamental combinations for the analysis of ultimate limit states. Both combination factors and load factors γ are applied in these combinations. Results of these combinations are transferred into design modules for the verification of the bearing resistance.

1st order combination SLS

  • The combinations for the analysis of serviceability limit states. Load factors γ aren't applied in these combinations. These combinations shows the values of structure deformations.

2nd order combination ULS

  • The combinations for the analysis of ultimate limit states according to the 2nd order theory. The rules are identical to the "1st order combination ULS". The combinations can be copied from 1st order or specified manually. Available only if the analysis according to the 2nd order is switched on in the window "Project information".

2nd order combination SLS

  • The combinations for the analysis of serviceability limit states according to the 2nd order theory. The rules are identical to the "1st order combination SLS". The combinations can be copied from 1st order or specified manually. Available only if the analysis according to the 2nd order is switched on in the window "Project information".

Linear stability combination

  • The combinations for the analysis of linear stability. These combinations don't contain any factors. Available only if the analysis of linear stability is switched on in the window "Project information".

Tabs with combinations tables

The list of combinations in the table can be created with the help of dedicated toolbar on the left side of the table. The toolbar contains the button "Generate" for batched input of combinations in the window "Combinations generator" and the button "Add" for the input of single combination in the window "Combination". The list of combinations may be displayed in the "Table of combinations" with the help of the button "Table".

The list of load cases and combinations may be transferred between projects with the help of the *.flc templates. The tools for the import and export of templates are included in the main menu in the part "Tools" - "Load cases and combinations".

Theoretical background is described in the chapter "Combinations".

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