Seismic Vulnerability Analysis in 3D City Models (3DCM)

Redweik, Paula; Costa, Paula Teves; Boas, Inês Vilas; Santos, Teresa

http://hdl.handle.net/10362/21254

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Lisbon is a city with high seismic risk, having been hit in the past by strong earthquakes. That’s the reason why several seismic vulnerability studies have been made devoted to the buildings of the capital, aiming the creation of different scenarios that depend on the magnitude and source location of the earthquake. The results of these studies have been presented as maps resulting from crossing information contained in 2D layers and presented in a GIS environment. 3D City Models (3DCM) intend to associate a database of a city to a rigorous geospatial representation and close to the visible reality in an urban environment, combining geometry and semantics. As such, they may include tools that convey attribute analysis at different levels, allowing the generation of new knowledge on a phenomenon or its effects, not only at the statistical level but also in terms of visual impact on the object. In this project it is intended to extend into the third dimension a seismic vulnerability study of the buildings of Lisbon held in 2D and explore the gains of spatial analysis in 3D representations. The various parameters that contribute to assess seismic vulnerability of buildings may be analyzed individually or simultaneously. The application of this tool will be demonstrated in a pilot area of Lisbon.