Keynote Lecture – Seismic Resilience and Energy Efficiency: An Integrated Loss Estimation Framework
To present date, building enhancement interventions tend to focus on either energy efficiency or seismic resilience, highlighting the lack of consistent language and understanding across both fields. The disconnection amongst stakeholders is particularly evident, arising from the development of seismic risk mitigation independently of sustainable development goals. Although extensive know-how exists in both areas, state-of-the-art efforts for its joint consideration are predominantly based on the evaluation of environmental impacts of expected repairs due to seismic action over a period of time. The latter neglects the potential of energy efficiency enhancements and, more importantly, the possible benefits of an integrated investment strategy. In this context, this paper presents a proposal for the integrated assessment of energy efficiency and earthquake resilience, according to which environmental and seismic impact metrics are translated into common financial decision making variables. Similarly to what is common practice when evaluating the energy and environmental performance of buildings, discrete classes of both earthquake resilience and energy efficiency are proposed. The resulting Green and Resilient Indicators (GRI), a consistent framework for building performance classification, is developed, providing a set of mutual performance parameters. Its application to the case of real buildings in distinct hazard scenarios highlights the fact that not only it is possible to directly compare energy efficiency and seismic resilience from a common point of view, as it is plausible to assume the Green and Resilient counterparts of the GRI classes as a proxy for investment return potential. In addition, it is verified that the benefit of a given intervention can only be maximized up to the point in which an additional investment does not result in increased performance. As a result, it is demonstrated that an integrated approach shall always be advantageous with respect to the investment in only Earthquake Resiliency or Energy Efficiency.