Horizontal combination of systems in the same direction Determine the appropriate response modification factors and design coefficients for the lateral structural system shown in Figure 5.18. • The building is assumed to have rigid diaphragm floors. • Special reinforced concrete building frame

Question

Horizontal combination of systems in the same direction
Determine the appropriate response modification factors and design coefficients for the lateral structural system shown in Figure 5.18.
• The building is assumed to have rigid diaphragm floors.
• Special reinforced concrete building frame shear walls (SRCSWs) and steel special moment frames (SSMFs) provide lateral load resistance in the same direction.

Accepted Answer

From ASCE-7 T 12.2-1
SRCSW
[latex]R =6, Ω_0 =2\frac{1}{2},C_d=5[/latex]
SSMF
[latex]R =8, Ω_0 =3,C_d=5\frac{1}{2}[/latex]
The most stringent values for R, [latex]Ω_0[/latex], and [latex]C_d[/latex] are to be used for both systems (Figure 5.19).
They are [latex]R =6, Ω_0 =3,C_d=5\frac{1}{2}[/latex].
If designed as a dual system, [latex]R =7, Ω_0 =2\frac{1}{2},C_d=5\frac{1}{2}[/latex].

Question 5.4: Horizontal combination of systems in the same direction Dete...

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