Rockfall Hazard Analysis Based on the Concept of Functional Safety with Application to the Highway Network in South Korea

Numerous rockfall incidents involving infrastructure damage and loss of life have been reported along roads in mountainous terrain. Previous studies used quantitative risk assessment approaches to identify the level risk. However, appropriate indicators that are able describe time-varying not yet developed. This study aims develop a mitigation method based on reliability concepts, classify data, model probability occurrence, estimate magnitude reduction through measures. A synthetic measure is proposed, which allows compare directly quantitatively for different cut slopes under unmitigated mitigated conditions. The proposed methodology can obtained using measures, such as introducing protections barriers, their periodic maintenance, horizontal coverage ratio. was applied 20 years data collected by Korea Expressway Corporation from 1215 artificial highway network South Korea. frequency analyzed inventory hazard strategy demonstrated suggested case study. It shown strategies, number protection interval ratio, be devised reduce below target failure probability. approach this provide insights into ways improving overall management prevent losses rockfall.