ABSTRACT
Using a typical two-dimensional unsaturated slope, this paper investigates the effects of random rainfall patterns on the stability of unsaturated slope under rainfall condition. Rainfall information is presented in the form of Intensity-Frequency-Duration (IFD) curves. Random Rainfall Patterns (RRPs) are simulated based on Random Cascade Model (RCM) and Monte Carlo Method (MCM). The Conditional Failure Probability (CFP) of the unsaturated slope is investigated by considering the numerous generated RRPs. Meanwhile, the Annual Failure Probability (AFP) of the unsaturated slope is estimated considering also the occurrence frequencies of rainfall events. The results show that the slope stability is sensitive to rainfall patterns, and the RRPs can be considered in the determination of slope reliability.
