Info

doubly underlined sets = major partial factors underlined sets = minor partial factors *on structural actions ton geotechnical actions

Sets A1-2 are applied to actions; M1-2 to material properties; R1-4 to resistance; E1-2 to action effects (using values from Sets A1-2).

Of the sixty-three partial factors specified in Annex A of EN 1997-1 for the GEO and STR limit states, just over half are numerically greater than one (the remainder are either unity or zero). In the table above, those sets in which the partial factors are significantly greater than one - and hence introduce reliability into the calculation - are doubly underlined; sets in which only one factor is > 1.0 or the factors are relatively small are singly underlined; and sets in which the factors are all unity are not underlined.1

In essence, Design Approach 1 provides reliability by applying different partial factors to two variables in two separate calculations ('Combinations' 1 and 2); whereas Design Approaches 2 and 3 apply factors to two variables simultaneously, in a single calculation - as summarized below.

Structure

Main variable that gets factored in Design Approach ...

Structure

Main variable that gets factored in Design Approach ...

0 0

Post a comment