Inputs
Method — Youd et al. (NCEER 2001)
- CSR = 0.65·(amax/g)·(σv/σv')·rd. Stress-reduction rd = 1 − 0.00765·z (z≤9.15 m).
- Corrected (N1)60 = N · CN; CN = √(100/σv') (capped at 1.7).
- (N1)60cs = (N1)60 + Δ(N1)60 (fines correction by Idriss-Boulanger).
- CRR_7.5 from (N1)60cs (NCEER chart). MSF = 174/Mw^2.56. CRR = CRR_7.5 · MSF.
- FoS = CRR/CSR. FoS < 1 → liquefaction triggered.
Results
σv (total)—
σv' (effective)—
CSR—
(N1)60cs—
CRR (Mw=7.5)—
CRR (adj.)—
FoS—
Status—