Rapid and Slow Unlocking-Induced Startup Mechanisms of Locked Segment-Dominated Landslides

Figure 3

Shear stress−strain relations of the strain-softening strong media constituting locked segments (red curves) and strain-hardening weak media filling the lower transfixion segments (gray curves) on the slip surfaces of the (a) Yanchihe [21] and (b) Longxi slopes [8]. BI denotes the brittleness index [22] of the strong media (where a greater BI indicates a higher brittleness), and SR denotes the shear strength ratio of strong medium to weak medium.

(a)

(b)