A QUANTITATIVE VULNERABILITY ASSESSMENT MODEL FOR TYPICAL ELEMENT AT LANDSLIDE RISK BASED ON WORK-ENERGY TRANSFORMATION

Based on the situation that the quantitative degree for assessing the vulnerability of element at landslides risk is low,the quantitative assessment method of the vulnerability is discussed.Through analyzing the failure process of element at risk impacted by the landslide mass,it is considered that the impact energy translates into the deformation energy of element at risk gradually,which is caused by impact force work in process of element at risk impacted by the landslide mass.Because of plastic deformation,the deformation energy dissipates progressively;then it leads to the destruction and collapse of element at risk.Vulnerability is defined quantitatively as a function of impact kinetic energy and the deformation energy of structure.The quantitative function is deduced.Based on this function,the quantitative vulnerability assessment model for typical element at landslide risk is established by using energy method to calculate velocity of landslide debris for the simplified case.This quantitative model accords with the principle of landslide mechanism.It is a new way for vulnerability quantitative assessment.