← All calculators

Seismic Site Classification & Response Spectrum

Weighted average 30 m profile analysis (Vs30, Nͥ60, su), automated Site Class assignment (ASCE 7 and Eurocode 8), site coefficients, and design acceleration spectrum.

1. Subsurface Profile (Top 30m Stratigraphy)
Layer Thick di (m) Vs (m/s) N60 su (kPa)
Layer 1
Layer 2
Layer 3
Layer 4
2. Seismic Ground Motion Parameters
ASCE 7 Site Class
Class D
Stiff Soil Profile
Eurocode 8 Ground
Type C
Deep Medium/Stiff
Weighted Vs30
268 m/s
Nbar: 22, su: 71 kPa
Design SDS
0.83 g
SD1: 0.53 g
Site Fa: 1.00
Site Fv: 1.60
Period T0: 0.13 s
Period Ts: 0.64 s

Free and open-source. You can buy me a coffee to support this project.