PSI - Issue 44

Lorenza Abbracciavento et al. / Procedia Structural Integrity 44 (2023) 750–757 Lorenza Abbracciavento et al./ Structural Integrity Procedia 00 (2022) 000–000

751

2

2003), essential facilities are required to remain in operation during and after the seismic event (Operational performance level). Ensuring this resilience objective requires, in particular, the harmonization of performance levels between structural and nonstructural components: even if structural components achieve the operational performance level, failure of architectural components or of mechanical, electrical, and plumbing (MEP) components can lower the seismic resilience of the entire facility (Bruneau and Reinhorn 2007; Cimellaro et al . 2010; Parise et al . 2013, 2014). In the specific case of hospitals and acute care facilities, the operational continuity critically depends also on the functionality of specialty medical equipment, which could have life supporting functions and are often high-tech and target of significant economic investments. In this paper, results from the seismic analyses performed on a major hospital ( Ospedale Mauriziano ) in Torino, Italy, are presented. The focus is on the analysis and verification of essential medical equipment related to the service continuity of the Emergency Department. A case study concerning a Computerized Axial Tomography scan is developed. The aim of the study is to illustrate a methodology for assessing both the integrity and functionality of medical equipment under earthquake loading. The proposed methodology adopts a resilience-based approach and is in agreement with the current Italian Building Code (NTC 2018) as well as with the most recent criteria and recommendations from international seismic standards (FEMA E74:2012; FEMA 356:2000; ICC AC-156:2010). 2. Case study Ospedale Mauriziano “Umberto I” is an articulated hospital complex consisting of 17 buildings, covering a surface of approximately 50 000 m 2 within a perimeter of about 900 m (Figure 1(a)). The initial construction dates to 1885, but new buildings, extensions and elevations have been added over time till nowadays. The Emergency Department of the hospital is housed in the building named Pavilion 17 (Figure 1(b)), built in 1996 and subsequently extended in 2010. The supporting structure of the building is a 4 storeys reinforced concrete frame, the floor system is given by reinforced concrete uniform slabs with orthotropic behaviour. Regularity in plan and in elevation and an in-plane diaphragm behaviour of the floor slabs are assumed in the seismic analyses.

(a) (b) Fig. 1. Ospedale Mauriziano “Umberto I”, Torino, Italy: (a) aerial view of the hospital complex; (b) denomination of the buildings (pavilions) that form the hospital complex, the Emergency Department is in Pavilion 17. 2.1. Resilience-based approach The concept of resilience is broadly used in several disciplines ranging from ecology, psychology and economics to materials science and engineering. In the conceptual framework provided by Bruneau et al . (2003), engineering resilience has been defined as the ability of a system to reduce the chances of a shock (abrupt reduction of performance), to absorb such a shock if it occurs, and to recover quickly afterwards (reestablish normal performance). Focusing on earthquake disasters, and specifically on post-disaster response, seismic resilience can be achieved: by enhancing the ability of a community’s structures and infrastructures to perform during and after an earthquake (Chiaia