PSI - Issue 44

Maria Polese et al. / Procedia Structural Integrity 44 (2023) 123–130

128

Maria Polese et al. / Structural Integrity Procedia 00 (2022) 000–000

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For this study application, seismic impacts are expressed in terms of economic losses, calculated according to Eq (1): = %&& ( ∙ (,, ∙ , . ,/0 1 2 (/0 3 (1) where n t is the number of defined building typologies, CU is the replacement cost (Euro/m 2 ) of a building, A j is the built area of the j th building typology, p j,k is the probability for the j th building typology to experience structural damage D k (EMS98 scale), c k is the percentage cost of repair or replacement (with respect to CU) for each damage state D k (0.02, 0.1, 0.3, 0.6 and 1 from damage level from D1 to D5). In application of Eq. (3), the unit reconstruction cost varies between Italy and Slovenia, being country-dependent (CU= 1350 and 1250 [ € /m 2 ] are adopted for Italy and Slovenia, respectively). The expected economic losses in 50 years time frame are approximately 24 M euros for Gorizia and almost double for Nova Gorica. This is due, on the one hand, to the greater number of masonry buildings in Nova Gorica, mainly in the more vulnerable classes (4289 masonry buildings built before 1965 against 2525 of Gorizia). On the other hand, the significant differences in RC building typologies of the two sides of the border lead to the adoption of a vulnerability model very similar to the Slovenian one in Nova Gorica (i.e., weights of the heuristic approach almost equal to 1); the latter model defines a significantly higher fragility of RC buildings with respect to the Italian model for the lower damage states (D1 and D2), that count most significantly in the computation of direct economic losses. 4. The WebGIS platform To be able to easily visualize the results of the analyses conducted, in addition to the input data used, a WebGIS platform was implemented. The platform focuses on two pilot case studies at cross-border sites: pilot 1 on the Italian Slovenian border and pilot 2 on the Slovenian-Austrian border. It involves seismic and flood risk as well as multi hazard risk assessment. It allows testing the procedures developed within the BORIS project and showing, as well as comparing, seismic and flood risk assessment in the transboundary areas. The platform facilitates the visualization and the storage of data, models, documentation, and the representation of damage and impact data following a common metrics approach. In Fig. 3, the platform's homepage is shown, and the two municipalities object of the study here presented, located in the pilot 1 area, are indicated. On the right side of the screen, some buttons allow operations on the map, like opening the layers panel, visualizing the legend, modifying the zoom, measuring distances on the map, search by municipality or coordinates. On the other hand, at the top of the map, icons are shown to investigate the different aspects considered of risk assessment.

Fig. 3. Homepage of the BORIS platform.