Vulnerability Assessment of RC Buildings To Landslide Displacements. Application To Corniglio Case History, Italy.

Abstract eng:
The present study shows an application to a specific case history (the Corniglio village major landslide) of a recently proposed analytical method for the vulnerability assessment of RC buildings subjected to earthquake induced slow-moving slides [5]. In particular, the method is applied to a representative building which suffered considerable damage by the landslide movement [7]. The main goal is to verify the reliability and applicability of the proposed procedure and of the respective fragility curves through the comparison of the numerical prediction with the observed building damage. Two different approaches of increased complexity were followed for the fragility analysis of the building. At first, two sets of the already developed fragility curves derived from an extensive parametric analysis [6] are selected as the more representative of the Corniglio case history. Thus, the results obtained from their application are compared with the observed building damage, for the measured level of building displacement. The direct comparison carried out proved that the proposed fragility curves could in general capture the performance of the studied RC building when affected by a landslide induced displacement. Then, to enhance the effective implementation of the proposed methodological framework within a more general probabilistic risk assessment study, appropriate fragility curves were defined for a specific building in Corniglio village by means of a straightforward numerical computation. In particular, a two-step numerical approach which includes soil structure dynamic analysis and a structural pseudo-static calculation was followed to assess the expected building induced stress and damage [5]. As in the previous step, the obtained fragility curves were tested through their comparison with the observed building damage data, for a given level of landslide displacement.

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