Combinations
The load combinations are used for the mutual action of different load cases (e.g. self-weight of the structure, snow load and wind load). The combinations are created separately for ultimate limit states, serviceability limit states (both also divided according to the theories of first and second order) and for linear stability.
The description of any combination contains the number and name and the list of included load cases including corresponding load case factors and combination factors. The variable load cases may be considered as main ones.
Ultimate limit states
Following types are available for ultimate limit states:
Basic |
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Alternative |
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Accidental |
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Serviceability limit states
Following types are available for serviceability limit states:
Characteristic |
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Frequent |
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Quasi-permanent |
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Final deflection |
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Linear stability
The combinations for linear stability don't use partial safety factors γf. The variable loads may be reduced with the help of the combination factor ψ0.