A STEP-CHANGE FOR SEISMIC RISK REDUCTION (Towards a) national plan for the integrated seismic-energetic rehabilitation of the building stock

UN CAMBIO DI MARCIA PER LA RIDUZIONE DEL RISCHIO SISMICO (Verso un) piano nazionale di riqualificazione integrata sismico-energetica del patrimonio edilizio

Stefano Pampanin The urgency of a coordinated and comprehensive National Plan for the reduction of seismic risk and the integrated seismic-energy rehabilitation of the Italian building stock, able to combine architectural, functional, energy aspects and needs, while targeting an improvement of structural and seismic safety, is increasingly evident.
"Safety first" is unanimously recognized as a fundamental objective in an ideal list of priorities.
However, rarely - in "peacetime", therefore before a seismic event - the improvement of the structural / seismic safety of a building becomes the main reason for a building rehabilitation and renovation.
With no doubt the assessment of the seismic vulnerability of existing buildings and the definition of appropriate retrofit solutions, therefore structurally effective, easy to implement, minimally invasive, economically affordable, possibly reversible and respectful of the preservation of the architectural-cultural heritage of the building, hide a significantly higher level of complexity than when designing a new seismic-resisting structure/building.
As if the technical complexity were not enough, the lack of economic resources to be able to support such a massive intervention on a national scale is often pointed out as a primary obstacle for the implementation of a long-term widespread rehabilitation project of the building stock at large scale.
Secondly, there is a lack of a co-ordinated action Plan with the definition of objectives, methodology, resources, timeframe according to a prioritization based on risk considerations and cost-benefit analysis – following non-traditional but multi-criteria approaches, able to capture, weighing and highlighting tangible and non-tangible technical-social-economic-environmental aspects.
Yet comparative studies and evaluations on the effectiveness of an active seismic prevention strategy when compared to a typically passive-reaction approach, clearly show significant socio-economic-environmental benefits in the medium-long term at the national level.
In parallel, when designing new earthquake-resisting building, targeting Life Safety of the occupants is clearly not enough anymore for the general public, who would expect to be provided with an “earthquake-proof” building. A paradigm shift in performance-based design criteria and objective towards damage-control or low-damage design philosophy and technologies is thus urgently required, to say the least.
This contribution intends to stimulate some reflections for the definition of a coordinated long-term action plan at national level, capable of raising the bar and aiming at a significant reduction of the socio-economic impacts associated with earthquakes, both for existing buildings and new buildings by promoting the use of new low-damage technologies.

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Software per la progettazione del rinforzo dei nodi trave-pilastro con FRP applicabile dal solo esterno. Il software è stato validato attraverso le prove sperimentali descritte in questo articolo"