Abstract: The vulnerability assessment for bearing body caused by single landslide is not highly quantitative. In view of this, we present a calculation method for the vulnerability of bearing body. On the basis of analyzing the process of landslide movement and the failure mechanism of bearing body, we introduced the plastic hinge concept and took plastic deformation process of bearing body into consideration to build a simplified calculation model. Furthermore, we simulated the deformation process of a reinforced concrete frame structure under the action of side force by using FEM software SAP2000, hence obtaining parameters of force and displacement for the simplified calculation model, and finally acquired the vulnerability results and classified the damage degree of the bearing body. Results show that the elastic-plastic process of building is similar to that of local plastic hinge, and the plastic process takes up a large proportion. The calculation results of safety distance 92.7m and distance 69.7m(V=1) are consistent with practical data.

Key words: landslide vulnerability, plastic deformation, finite element, side force, damage classification