Method of Cortè (1985)

<< Click to Display Table of Contents >>

Navigation:  Theoretical notes > Simplifid methods >

Method of Cortè (1985)

For the computation of CRR , Cortè proposes two relationships function of the parameter D50:


for soils with 0,04 mm D50 0,6:



for soils with 0,6 mm D50 1,5:


The coefficient A takes values ​​that vary between 0.50 and 0.66, depending on the magnitude of the earthquake and on the number of equivalent cycles that vary at their turn between 5 and 20.

CSR is calculated using the expression developed by Seed and Idriss (1971-1982) where the reduction factor rd is determined using the empirical formula proposed by Iwasaki et al. (1978)



©  Geostru