In this paper we describe the potentialities of a tool for the visualization of experimental results directly on a three-dimensional model. The case study concerns the visualization of the results of a dynamic finite element analysis (FEA/FEM) applied to the calculation of seismic risk on works belonging to the Italian infrastructural heritage, specifically bridges, viaducts and overpasses. The project is based on finite element analysis performed on an exemplary set of eight structures located on the Italian territory, performed by means of the open-source software framework OpenSees, according to the guidelines indicated in the Technical Standards for Construction NTC08. The application created for this project is classifiable as a webGIS, since all data are georeferenced and visualized on a map through an application executed through a browser. The graphical interface displays the interested works on the map of the Italian territory and allows to select them by mouse click. Following the selection, a 3D rendering of the model of the work and the surrounding terrain is shown, in which the results of the analysis are represented using color gradients directly on the three-dimensional model. The necessary tools are present for the selection of the type of result and for the animation in real time of the response of the work to the seismic action. The 3D representation is freely navigable by the user due to intuitive tools of panning, rotation and zoom through mouse and keyboard. The application takes advantage of HTML5, CSS and Javascript to show graphical features such as Cartesian diagrams of accelerograms used in modal analysis.

The present research activity carried out demonstrated how simulation tools developed through WebGIS 3D digital platforms are capable of producing approximate forecasts of the effects of potentially catastrophic meteorological phenomena that may affect riverbeds in the territories observed. This work presents an analysis and simulation platform with graphic representation of the results in the form of three-dimensional animation. This methodology may represent a useful tool for all bodies and organizations that need to create hypothetical scenarios for the management of emergencies related to flooding events in watercourses, especially in areas of maximum hydrogeological vulnerability in the Italian territory. These scenarios are particularly useful in cases where watercourses are located near inhabited centers, industrial areas or strategic infrastructures, where the risk of material damage and danger to the population is greater. The simulation is based on the morphology of the land adjacent to the bed of an affected watercourse, taking elevation into account to determine the direction of the expansion of the water mass. An important aspect of the platform is the extreme speed of simulation resolution, which allows the tool to be used even in real time. This real-time forecasting approach is crucial for making quick and informed decisions, thus reducing reaction times and improving emergency management on the ground, with a potential positive impact on the safety of the population and the protection of infrastructure.

Seismic risk assessment is a multidisciplinary endeavour that requires the integration of heterogeneous data sources and advanced modelling techniques. Recent advances in information technology (IT) have profoundly changed this field by enabling efficient data management, high-performance simulation, and dynamic visualization. This paper presents EUCLIDE, a platform developed at Eucentre for seismic risk assessment of structures and infrastructure across the Italian territory. EUCLIDE exploits extensive exposure databases and custom vulnerability models to support both probabilistic and deterministic seismic hazard damage analyses. We provide a detailed overview of the platform and highlight its capability to deliver comprehensive risk estimations for Italian assets exposed to seismic hazards.

The research activity carried out has demonstrated how simulation tools developed through WebGIS3d digital platforms are capable of producing approximate forecasts on the effects of potentially catastrophic meteorological phenomena that may affect riverbeds in the territories observed. This work presents an analysis and simulation platform with graphic representation of the results in the form of three-dimensional animation. This methodology may represent a useful tool for all those bodies and organizations that need to create hypothetical scenarios for the management of emergencies related to flooding events of watercourses, especially in the areas of maximum hydrogeological vulnerability in the Italian territory. These scenarios are particularly useful in cases where watercourses are located near inhabited centers, industrial areas or strategic infrastructures, where the risk of material damage and danger to the population is greater. The simulation is based on the morphology of the land adjacent to the bed of the affected watercourse, taking elevation into account to determine the direction of expansion of the water mass. Such scenarios are particularly useful in cases where watercourses are located near built-up areas, industrial areas or strategic infrastructures, where the risk of material damage and danger to the population is greater. The simulation is based on the morphology of the terrain adjacent to the affected watercourse bed, taking elevation into consideration to determine the direction of ex-pansion of the water mass. A distinctive aspect of the platform is its extreme speed in the resolution of simulations, which also allows the tool to be used in real time. This means that during the occurrence of a meteoro-logical event, the platform can be used to monitor the evolution of the situation and predict the effects of any persistence of the phenomenon over time. This real-time forecasting capability is crucial for making quick and informed decisions, thus reducing reaction times and improving emergency management on the ground, with a potential positive impact on the safety of the population and the protection of infrastructure.

Italian roadway network is managed by several authorities including ANAS (Azienda Nazionale Autonoma delle Strade), regional and provincial administrations, and managing concessionaires of motorways. This network comprises approximately 30,000–35,000 km of main roads and highways, encompassing tens of thousands of bridges and viaducts distributed across the country. Given the large number of infrastructure assets, many of which were constructed before the era of digital record-keeping, it is virtually impossible to perform an ad-hoc seismic vulnerability assessment foreachfor individual bridge due to limited data availability. To address this challenge, a study commissioned by the Italian Department of Civil Protection (IDCP) was carried out at the EUCENTRE Foundation to classify bridges into taxonomies. For each taxonomy, a set of fragility curves, newly developed within the study, was associated. The aim of this research is to identify, within the framework of a multi-level, large-scale seismic vulnerability assessment, the most critical cases in the extensive bridge stock, thereby determining where more detailed analyses are necessary and to defining priorities of intervention. In this paper, the assumptions used for the bridge classification, the numerical models adopted for the derivation of the fragility curves, and the parameters of the resulting curves are reported and discussed.