Abstract
The paper aims to report a proper low-impact integrated study approach for the energy and seismic retrofitting of a tower building located in the city centre of Brescia (Italy). The building consists of a group of aggregate buildings built in the 1950s, from which emerged an 11-storey tower. It was built with the technology of the time by means of a perimeter and spine framed structure in reinforced concrete, double perimeter infill with a hollow brick air chamber, external cladding on the main fronts with small Botticino marble tiles. The building is registered by the Ministry of Cultural Heritage for its facade and is located in a seismic zone of category two. When work began, the construction was in a class three; thus, the whole project was updated to obtain the new seismic authorisation. The coating showed progressive decay, with dangerous structural instability of the heavy coating. The design team decided to adopt wider corrective action compared to the observed phenomenon, integrating it with a local seismic and global energy improvement through the insertion of a ventilated wall in the building and the realisation of accurate thermal and energy insulation systems. At the end of the intervention, this building became the first condominium in Italy in 2018, certified in class A and upgraded with sustainability criteria in which the application of the GBC Italy (Green Building Council) Condominiums protocol, currently in its final publication phase for the energy–environmental sustainability of condominiums, has been tested.
Highlights
Accepted: 2 August 2021The paper intends to report a proper low-impact integrated study approach for the seismic and energetic improvement of a tower building located in the centre of the city of Brescia in Lombardy, Italy, seismic class 2
New Regional provisions came into force that placed the Brescia town centre, and the buildings of interest, in a category two seismic zone, with the need to formally update the project and obtain seismic authorisation with the new input accelerations: ag,max = 0.154219 according to [6]
Essential to draw up Execution on for the seismic and energy improvement ofaa“Construction tower building located Plan”
Summary
Accepted: 2 August 2021The paper intends to report a proper low-impact integrated study approach for the seismic and energetic improvement of a tower building located in the centre of the city of Brescia in Lombardy, Italy, seismic class 2. The building was the object of application, as a case study, of the first version of the GBC (Green Building Council) Condominiums energy–environmental protocol, with the aim of verifying the applicability of this specific rating system, which was newly drawn up by the Green Building Council Italia [1]. In addition to the traditional environmental energy components— found in other systems such as LEED or BREEAM—there is a specific area on building durability and resilience. These aspects are included in the GBC Condominiums rating in order to support the analysis and management of the risk associated with extreme structural and climatic phenomena, for which the existing building being upgraded was not originally designed, and to make conscious upgrading choices
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