The seismic vulnerability assessment of existing urban areas provides fundamental information about the process of reduction of seismic risk in different phases of planning and emergency management. This contribution presents the salient aspects of a comprehensive hybrid approach to large-scale seismic vulnerability and risk assessment of existing urban areas. The developed methodology combines the advantages of the vulnerability index method in assessing the seismic vulnerability for large-scale datasets of buildings with a detailed analytical approach based on the nonlinear static pushover method, which allows the determination of the capacity curves and the specific limit states of the buildings. The proposed methodology includes all phases leading to the final risk estimation, starting from the stage of data collection and detection of buildings characteristics and ground type to the vulnerability index evaluation, and the execution of non-linear analysis of the selected buildings, to the definition of vulnerability–peak ground acceleration curves, to the derivation of the vulnerability curves for the selected urban area. The outcome of the research is risk representation in terms of the damage and seismic risk indexes. The application of the methodology is demonstrated through the computation of seismic vulnerability and risk assessment of a Croatian settlement located near Split along the Adriatic coast. The presented procedure has provided the seismic vulnerability indices, the damage indices, the critical accelerations for different limit states, and the indices of seismic risk for different return periods. The results have been integrated into a web GIS map that enables the visualization of both vulnerability and risk of the selected area. The findings of the developed methodology are shown to have important operational outcomes in the seismic risk management of the investigated area.
A HYBRID PROCEDURE FOR SEISMIC VULNERABILITY ASSESSMENT OF URBAN AREAS
E. Benvenuti;
2024
Abstract
The seismic vulnerability assessment of existing urban areas provides fundamental information about the process of reduction of seismic risk in different phases of planning and emergency management. This contribution presents the salient aspects of a comprehensive hybrid approach to large-scale seismic vulnerability and risk assessment of existing urban areas. The developed methodology combines the advantages of the vulnerability index method in assessing the seismic vulnerability for large-scale datasets of buildings with a detailed analytical approach based on the nonlinear static pushover method, which allows the determination of the capacity curves and the specific limit states of the buildings. The proposed methodology includes all phases leading to the final risk estimation, starting from the stage of data collection and detection of buildings characteristics and ground type to the vulnerability index evaluation, and the execution of non-linear analysis of the selected buildings, to the definition of vulnerability–peak ground acceleration curves, to the derivation of the vulnerability curves for the selected urban area. The outcome of the research is risk representation in terms of the damage and seismic risk indexes. The application of the methodology is demonstrated through the computation of seismic vulnerability and risk assessment of a Croatian settlement located near Split along the Adriatic coast. The presented procedure has provided the seismic vulnerability indices, the damage indices, the critical accelerations for different limit states, and the indices of seismic risk for different return periods. The results have been integrated into a web GIS map that enables the visualization of both vulnerability and risk of the selected area. The findings of the developed methodology are shown to have important operational outcomes in the seismic risk management of the investigated area.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
