Yg And Yq Safety Factors

I 1.2 I or I10I

a See also paragraph (3) below b See Eurocode 1; in normal cases for building structures yQ,inf = 0. c See relevant clauses a See also paragraph (3) below b See Eurocode 1; in normal cases for building structures yQ,inf = 0. c See relevant clauses

(3) Where, according to 2.3.2.3 P(3), favourable and unfavourable parts of a permanent action need to be considered as individual actions, the favourable part should be associated with YG,inf = 1091 and the unfavourable part with YG,sup = 1111

P(4) Prestressing. For the evaluation of local effects (anchorage zones, bursting pressure) an effect equivalent to the ultimate characteristic strength shall be applied to the tendons (see 2.5.4).

(5) For the verification of the design of prestressed elements, the Yp values in Table 2.2 should generally be used. However, for the evaluation of the combined effects of prestressing and of self-weight, reduced values of partial safety factors, which do not include allowances for analytical uncertainty, may be used (e.g. Yp = 110 | and Yg = 1121), where prestressing is favourable).

(6) Imposed deformations. Where non-linear methods of analysis are used the factors for variable actions given above apply. For a linear calculation, the factor for unfavourable effects shall be reduced by | 20 % | (i.e. Yq = 1.2).

(7) Vectorial effects. Where components of a vectorial force act independently, the factors applied to any favourable component shall be reduced by | 20 % |.

(8) By adopting the Y values given in Table 2.2, the expression [2.7(a)] may be replaced by the following:

— for design situations with only one variable action Qk1

— for design situations with two or more variable actions Qk1

whichever gives the most unfavourable effects.

2.3.3.2 Partial safety factors for materials

(1) Partial safety factors for material properties are given in Table 2.3.

Table 2.3 — Partial safety factors for material properties

2.3.3.2 Partial safety factors for materials

(1) Partial safety factors for material properties are given in Table 2.3.

Table 2.3 — Partial safety factors for material properties

Combination

Concrete yc

Steel reinforcement or prestressing tendons ys

Fundamental

Accidental (except earthquakes)

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