AS/NZS 1170.5 Response Spectrum

Seismic response spectrum per NZS 1170.5:2004 (including Amendments)

Location & Hazard

Location (NZS 1170.5 Table 3.3)

Per NZS 1170.5:2004 Table 3.3

Hazard Factor Z

Return Period Factor Ru (ULS)

Per NZS 1170.5 Table 3.5

Subsoil Class

Ductility Factor μ

Performance Factor Sp

Period T1 (s)

Damping Ratio (%)

Near-Fault Factor N(T,D)

Tmin (s)

Tmax (s)

Step dT (s)

Elastic: C(T) = Ch(T) × Z × Ru × N(T,D)
Design: Cd(T) = Sp × C(T) × kμ
kμ = - (per NZS 1170.5 Clause 5.2.1)

Z-

Z×Ru (capped)-

kμ-

Sp-

C(T1) elastic-

Cd(T1) design-

T (s)	Ch(T)	C(T) (g)	kμ	Cd(T) (g)

Based on NZS 1170.5:2004 with Amendments. Verify with latest standard for project work.