Over the last twenty years, the Italian real estate market has undergone profound transformation, stressed by the economic crisis that has hit the industry. The construction of new residential buildings has undergone a dramatic downturn, while investments related to the renovation of existing buildings have been growing for over 10 years. Considering that residential buildings with masonry structures account for more than 50% of the total, of which about 75% were built prior to 1970 and therefore typically have significant deficiencies in terms of energy saving and seismic vulnerability, it's easy understand the importance of an integrated approach to the retrofit of these buildings. In relation to these considerations, a field of extreme interest is the historical heritage, for which the requirements to improve structural safety and energy performance has to comply with the need to preserve and protect the historic good. In Italy, the existing building energy performance standards do not apply to heritage and there are no procedures for considering the combined effects of structural interventions and energy efficiency, although this situation is increasingly recurring. In this regard, it is extremely interesting to evaluate the effect on the energy performance of seismic improvement works on masonry buildings. This paper shows the numerical simulations carried out on some of the most common wall types in Italy, adopting traditional consolidation techniques coupled with energy efficiency interventions. The results obtained allow us to evaluate the effects on transmittance variations produced by these combined interventions and demonstrate the need for a multidisciplinary approach to the problem, achieving structural safety objectives, energy efficiency and conservation with a consistent economic convenience compared to the traditional approach that sees the energy intervention designed / executed after the structural one.
Nell'ultimo ventennio il mercato immobiliare italiano ha subito una profonda trasformazione, accentuata dalla crisi economica che ha investito il settore. La realizzazione di nuovi edifici abitativi ha subito un fortissimo ridimensionamento, mentre gli investimenti legati alla ristrutturazione di immobili esistenti sono in crescita da oltre 10 anni. Gli edifici residenziali con struttura portante in muratura rappresentano oltre il 50% del totale, e di questi circa il 75% è stato realizzato prima del 1970, quindi tipicamente presenta notevoli carenze sia dal punto di vista energetico che della vulnerabilità sismica. Per gli edifici in muratura situati nei centri storici si pone inoltre il problema della salvaguardia degli elementi di pregio storico-architettonico che contribuiscono a caratterizzare fortemente il paesaggio. Nella memoria sono illustrati alcuni risultati di una ricerca tuttora in corso, elaborata con l'intento di evidenziare i punti di contatto e proporre nuove modalità di esecuzione condivise tra gli interventi volti all'efficientamento energetico e quelli volti al miglioramento sismico degli edifici in muratura. In tale ambito sono presentati i risultati di alcune simulazioni numeriche volte a quantificare il possibile risparmio energetico, qualora si intervenga con interventi combinati, grazie al miglioramento delle prestazioni termiche dell'involucro in muratura.
Interventi combinati di miglioramento sismico ed efficientamento energetico di edifici esistenti in muratura
Antonio Mannella;Mariangela De Vita;Antonio Sabino
2017
Abstract
Over the last twenty years, the Italian real estate market has undergone profound transformation, stressed by the economic crisis that has hit the industry. The construction of new residential buildings has undergone a dramatic downturn, while investments related to the renovation of existing buildings have been growing for over 10 years. Considering that residential buildings with masonry structures account for more than 50% of the total, of which about 75% were built prior to 1970 and therefore typically have significant deficiencies in terms of energy saving and seismic vulnerability, it's easy understand the importance of an integrated approach to the retrofit of these buildings. In relation to these considerations, a field of extreme interest is the historical heritage, for which the requirements to improve structural safety and energy performance has to comply with the need to preserve and protect the historic good. In Italy, the existing building energy performance standards do not apply to heritage and there are no procedures for considering the combined effects of structural interventions and energy efficiency, although this situation is increasingly recurring. In this regard, it is extremely interesting to evaluate the effect on the energy performance of seismic improvement works on masonry buildings. This paper shows the numerical simulations carried out on some of the most common wall types in Italy, adopting traditional consolidation techniques coupled with energy efficiency interventions. The results obtained allow us to evaluate the effects on transmittance variations produced by these combined interventions and demonstrate the need for a multidisciplinary approach to the problem, achieving structural safety objectives, energy efficiency and conservation with a consistent economic convenience compared to the traditional approach that sees the energy intervention designed / executed after the structural one.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.