D. OTTONELLI(1), S. LAGOMARSINO(2), S. CATTARI(3)
(1) Research Assistant, Department of Civil, Chemical and Environmental Engineering, University of Genova, Genova, Italy, 16145, email@example.com
(2) Full Professor, Department of Civil, Chemical and Environmental Engineering, University of Genova, Genova, Italy, 16145, firstname.lastname@example.org
(3) Researcher, Department of Civil, Chemical and Environmental Engineering, University of Genova, Genova, Italy, 16145, email@example.com
Seismic risk is defined as the potential of negative consequences of hazardous events that may occur in a specific area over a set period of time. In particular, the outcome of a seismic risk analysis is defined as the mean annual rate of specific consequences, which is obtained by the probabilistic convolution of the three components: hazard, vulnerability and exposure. These types of analyses are being increasingly directed to the evaluation of the socio-economic consequences of the earthquake, which represent a critical aspect that still requires more research than other components of risk, since in the past most attention has been addressed to the hazard and vulnerability, especially for masonry structures of the European built environment. For this reason this paper provides a contribution to the seismic assessment of economic losses in masonry buildings, following a component-based approach, to be implemented within modern probabilistic seismic risk analysis. It is based on the computation of “proper decision variables” enabling an assessment of the potential economic losses due to direct repair costs, carried out to mainly improve buildings resilience after an earthquake and the cost-benefit evaluations of mitigation tactics. The procedure proposed may be implemented on a building specific and regional basis. To show the effectiveness of the proposal, it has been applied to a three-storey unreinforced masonry building, selected as case study. This structure has been examined with two configurations of construction details in order to simulate two different collapse mechanisms in the in-plane seismic response and enable annual losses to be evaluated.
KEYWORDS: seismic risk, unreinforced masonry building, loss assessment, performance-based approach, building resilience.