Vulnerability assessment model for hazard bearing body and landslide risk index

Quantitative assessment of vulnerability for hazard bearing body is a difficult problem in landslide risk assessment. Taking impulse of landslide impact as disaster-causing strength index and taking whole shear force of building as disaster-resisting performance index, the quantitative assessment model for vulnerability of typical hazard bearing body is deduced. On this basis, considering the influence of randomness of movement parameter on vulnerability, the risk curve and maximum risk index are put forward so as to reflect the influence of uncertainty in process of landslide hazard. Influence of geometrical parameters of slope, space location and disaster-resisting performance of hazard bearing body on vulnerability are analyzed based on the model. Using risk index for case study and comparing with the existing methods, the quantitative assessment model can reflect the relationship between damage degree of hazard bearing body with each influential factor in two-dimension condition. The model provides a new way for quantitative assessment of vulnerability.