Conservazione e sicurezza strutturale nel patrimonio novecentesco. Spunti di riflessione per un indirizzo normativo

The verification of structural safety and the consolidation of 20th-century architecture in ‘mixed’ or reinforced concrete structures are complex issues in the current debate, partly because the regulatory instruments governing structural restoration focus explicitly on masonry buildings but not on those featuring reinforced concrete components. In fact, designers, today, are led to study reinforcement solutions in which the objective of structural rehabilitation prevails, not always taking into account conservation requirements, upmost when it is necessary to increase the capacity to bear loads greater than the original ones and/or to ensure greater seismic solidity. An approach aimed at balancing static/dynamic requirements with those of protection represents, as in traditional construction, the goal of structural restoration, for which there is an urgent need for a regulatory reference specifically dedicated to 20th-century heritage of recognized architectural quality. This paper aims to address the topic, offering initial considerations with the help of a few examples of Roman buildings from the last century.