Risk Assessment of Selected Building Infrastructure: Case of Landslide

Abstract

Landslide is geological hazard which occur due to ground motion and create serious impacts to human and various infrastructures. Landslides often occur along with other major natural hazards such as earthquakes, floods, melting snow and volcanoes that play a role in triggering the landslide mechanism. Mountainous regions with slopes are more prone to landslides. Slope and coastal areas are the most affected locations therefore the study is required to assess the possible risk.

The method is based on a failure mode & effect so the model is developed from statistical relationships based on past landslide behavior were used to calculate failure frequency for the next upcoming years. A literature study of direct damage due to landslides during the study period was done and the main elements at risk in the area identified & losses per type of element were estimated and expressed as an average ‘specific loss’ for events. Risk was assessed by comparing severity of losses and occurrence of landslide in past case examples with was expressed as a fraction of that value (0–5). As per the severity and occurrence ranking a cumulative index of RPN numbers for selected typology of building is created and classified in high, medium and low category, which further validated with expert survey. Experts were instructed to validate the risk ranking based on their past experience in the relative field. After the results and analysis the updated RPN and risk ranking is done & applied on a literature case example to evaluate the reduction of risk through mitigation strategy. As per the associated risk mitigation strategies are suggested for the high and medium risk component as the low risk category does not required any specified mitigation strategy.