3DGIS representation for supporting seismic mitigation policies at urban scale: The case study of Lisbon

The structural capacity of buildings to guarantee acceptable safety levels during and after earthquakes has significant influence on community and urban resilience. The paper presents the implementation in the Geographic Information System (GIS) of the data related to the expected seismic damage scenarios for some existing residential mixed masonry-reinforced concrete buildings located in Lisbon area. At city scale, such kind of representation can effectively support the seismic risk management including the design of mitigation policies. In fact, the spatial representation of results provides clear and global overview of the area under analysis, understandable not only to scientist and engineers, but also to the city councils and population. Damage scenario are defined on basis on fragility curves computed analytically through a nonlinear static approach by focusing the attention only to the in-plane global response and considering also the aggregate effect. The application to Lisbon city shows that the expected level of the damage consequent to the code action is high for the structural typology under investigation.