Effects of Earthquake on Behavior Characteristics of Fault Gouge in Time-History Analysis of Slope

Table 4

Residual shear stress (or strain)/peak (maximum) shear stress (or strain) ratio of each fault gouge and earthquake in the model. The R/P ratio is approximately 40%–55% for each earthquake, with the exception of the M3.9 earthquake. This means that ground has some permanent strain after the earthquake. The residual shear strain is higher than the maximum shear strain during the M3.9 earthquake.

R/P ratio (%)	M3.0	M3.9	M5.1	M5.4	M5.8
Fault gouge 1	45.3	114.6	50.0	43.0	50.0
Fault gouge 2	44.8	112.8	50.0	42.1	51.4
Fault gouge 3	43.9	109.7	50.2	40.3	54.6
Fault gouge 4	44.6	112.2	50.1	41.5	52.4
Fault gouge 5	44.3	110.8	50.0	41.0	53.1
Fault gouge 6	44.4	110.9	49.9	41.3	52.5