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Fragility curves for rapid assessment of earthquake-induced damage to earth-retaining walls starting from optimal seismic intensity measures
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Interdependencies in Seismic Risk Assessment of Seaport Systems: Case Study at Largest Commercial Port in Italy
No full textSeaports play an essential role in the policies of sustainable mobility as critical links allowing the transfer of goods and passengers, thereby helping to increase the functionality and efficiency of the general system of transportation of a country. Furthermore, seaports represent priority entry points into an area affected by an earthquake and, thus, play a crucial role in rescue operations. Poor performance was exhibited by seaports in past and recent earthquakes, particularly for wharf structures, which suffered severe damage because of ground shaking and soil liquefaction. Seaports represent a multicomponent system in which each element has its own feature and vulnerability. Under earthquake loading, various facilities can be damaged—from wharves with their supporting systems to cranes and other utilities. A potential disruption of one element may trigger a domino (or cascade) effect that influences the performance of the entire system. This paper focuses on the influence of interdependencies among components in the seismic risk assessment of a seaport system. A methodology has been devised to assess the seismic risk of a port viewed as a multicomponent system and applied to the port of Gioia Tauro, the largest terminal for transshipment in Italy and one of the most important hubs for container traffic in the Mediterranean Sea. The Gioia Tauro seaport is in Calabria, which is the region in Italy characterized by the highest seismic hazard. This paper compares the results obtained in the assessment of the seismic vulnerability of the seaport, considering and neglecting the interdependencies among its components
Regional low-magnitude GMPE to estimate spectral accelerations for earthquake early warning applications in Southern Italy
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Valutazione della risposta sismica di dighe in terra della Regione Campania mediante approcci semplificati
No full textEmpirical Magnitude-Upper Bound Distance Curves of Earthquake Triggered Liquefaction Occurrence in Europe
No full textA multi-scale tool for assessing the seismic risk of small dams during emergency preparedness and response phase
No full textSmall dams are critical infrastructures, which provide different kinds of benefits, such as water supply, flood control, hydropower generation. Existing small dams are typically embankment structures, built without complying with the regulations of well-engineered large dams. Being often located near inhabited areas, the failure under earthquake loading of such types of structures would entail serious consequences for community safety.
This paper aims at proposing a multi-scale methodology to assess the seismic risk of small dams. An application is illustrated with reference to the dams located in the Valle d’Aosta Region (Italy). State-of-the-art indices for large-scale risk-based prioritization are computed by convolving the seismic hazard with the vulnerability and the exposure. According to the methodology, for the dams to which the worst values of seismic risk indices are assigned, specific analyses based on Monte Carlo simulations are carried out to express the seismic response of embankment dams by addressing the associated uncertainties. The outcomes computed in the preparedness phase could be adopted to evaluate in near real-time the response of small dams in the immediate aftermath of an earthquake. Indeed, an algorithm was developed by using Geographic Information System for near real-time assessment of earthquake-related damage to small dams. The proposed multi-scale tool may support decision-makers, from civil protection organizations at the national level down to regional administrations, dam owners, first responders, infrastructure operators, and environmental
protection agencies
Soil liquefaction during the May 20, 2012 M5.9 Emilia earthquake, Northern Italy: field reconnaissance and post-event assessment
No full textA geospatial approach for mapping the earthquake-induced liquefaction risk at the european scale
Full text linkThis paper presents a geospatial methodology for zoning the earthquake-induced soil liquefaction risk at a continental scale and set-up in a Geographic Information System (GIS) environment by coupling data-driven and knowledge-driven approaches. It is worth mentioning that liquefaction is a phenomenon of soil instability occurring at a very local spatial scale; thus, the mega-zonation of liquefaction risk at a continental scale is a hard facing challenge. Since the risk from natural disasters is the convolution of hazard, vulnerability, and exposure, the liquefaction risk mapping is based on the combination of geospatial explanatory variables, available at the continental scale, of the previously listed three assumed independent random variables. First, by applying a prediction model calibrated for Europe, the probability of liquefaction is mapped for the whole continent. Then, the Analytical Hierarchy Process (AHP) is adopted to identify areas that have a high risk of liquefaction, taking into account proxy data for exposure. The maps are computed for different levels of severity of ground shaking specified by three return periods (i.e., 475, 975, and 2475 years). A broad variety of stakeholders would benefit from the outcomes of this study, such as civil protection organizations, insurance and re-insurance companies, and infrastructure operators
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