PSI - Issue 64

Alessandro Prota et al. / Procedia Structural Integrity 64 (2024) 1041–1048 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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approximate area of 2,500 square meters. The building comprises classrooms and school offices, and its total height (H) is 7.2 meters. Notably, the floor plan includes an auditorium at the core, which is structurally independent of the main building being studied (see Fig. 2). The examination of this auditorium falls beyond the scope of the current research. Gravity loads are withstood by pendular frames, while Concentrically Braced Frames (CBFs) resist wind and seismic actions.

Structural indipendent Auditorium

Case-study

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b)

Fig. 2. (a) Investigated school building; (b) plan view

2.2. Level of knowledge for the existing building The school building is situated in Avellino (AV, Italy), characterized by a peak ground acceleration of 0.238g, indicating a medium to high seismic intensity class. The site falls under topographic class "T1" and soil category "C," as per CEN (2004) and CS.LL.PP. (2018). These geotechnical details, vital for seismic assessment, were extrapolated from the original project report. The construction of the building occurred between 1982 and 1987, and its overall dimensions, cross-sectional properties of structural elements, and the positioning of seismic systems align with the specifications outlined in the original project report and accompanying construction and connection detail drawings. The information contained in the original project report and drawing were checked through a survey of the building and a campaign of in-situ measurements (see Fig. 3).

Fig. 3. Visual survey

In CBFs, columns are constructed using HEB160 profiles, while the remaining vertical members utilize HEA160 sections. Whereases, for the beams IPE profiles with varying depths ranging from 220 mm to 360 mm were adopted. The floors are composed of steel corrugated sheets, with the exception of the first level, which features a composite slab incorporating a 10 cm thick reinforced concrete topping. At the roof, the sheet is securely attached to the beams,