Novel models and tools to evaluate the economic feasibility of retrofitting intervention

In order to mitigate the seismic risk, politician decision-makers, insurance companies, banks, professional engineers, private owners, (despite operating at different territorial scale and with different aims) need of accurate tools able to highlight the negative economic effects of an earthquake in terms of reduction of building economic value and earning power effective time. In this way, accurate seismic direct economic losses scenarios have a key role. In this paper, a new procedure for probabilistic, analytical seismic direct economic losses scenarios has been discussed and applied. Economic fragility curves for different existing building types (RC-MRF) have been defined. The economic feasibility of different form of retrofit interventions strongly depends by the entity of negative seismic damage economic effects, in terms of reduction of building economic value and earning power effective time. In this paper, a first attempt in estimation of building residual economic life after an earthquake has been performed. An innovative tool based on the integration of seismic direct losses models in building life-cycle cost value models has been presented and applied. This tool plays a fundamental role in promotion of a private seismic risk mitigation strategies, highlighted as accurate retrofitting intervention in peacetime could be able to minimize the negative seismic financial effects that is a primary objectives of owners-investors.