Coefficienti di sovraresistenza

1) Apri la finestra di dialogo Casi e combinazioni di carico. Nella scheda Base, seleziona l'opzione Modifica parametri dell'edizione. I valori predefiniti sono impostati su 2.0 (Figura 01).

1 Modifica parametri dell'edizione

• Caso A: To apply the same factor in the X and Y directions, use the generic (no direction) overstrength factor Ω_o.
• Caso B: To apply different factors in each direction, use the overstrength factors X and Y, Ω_o,x and Ω_o,y. The generic factor Ω_o in the first row is not used.

2) Nella scheda Casi di carico, crea un caso di carico sismico con Qe come la Categoria di azione. Next, activate the 'Additional Settings | Consider X and Y independently' option. Then, select the Additional Settings tab and pick the direction. There is also option to consider orthogonal combination (Image 02).

2 Crea caso di carico sismico

Note: When neither or both directions are activated under the same load case, the generic overstrength factor, Ωo is used. Create a separate load case to apply the individual factors, Ω_o,x and Ω_o,y.

3) Under the Design Situations tab, select the applicable overstrength Design Situation Type. Both LRFD and ASD methods are available (Image 03).

3 Situazioni di progetto di sovraresistenza

4) In the Load Combinations or Result Combinations tab, verify that the correct factor(s) have been applied. Click OK to exit (Image 04).

4 Verifica il coefficiente di sovraresistenza

5) The final step is to assign the applicable limit state type to the overstrength design situation. For members without assigned seismic configuration, select the "Strength limit state" (LRFD or ASD) as the Limit State Type.

For members with assigned seismic configuration, use “Seismic limit state – overstrength” (LRFD or ASD) (Image 05).

5 Tipo di stato limite di sovraresistenza