PSI - Issue 64

Sabatino Di Benedetto et al. / Procedia Structural Integrity 64 (2024) 983–990 S. Di Benedetto / Structural Integrity Procedia 00 (2019) 000 – 000

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2. Description of the case study A 3D representation of the structural frames of the school is depicted in Fig. 1. The building comprises two stories with a height of 3.60 m and covers an irregular floor plan of approximately 2500 m², which can be encompassed within a rectangle measuring 70 m x 84 m. HEA160 and HEB160 profiles are employed for the columns belonging to gravity and concentrically braced frames, respectively. The beams are IPE profiles with depths ranging as illustrated in Fig. 2. Additionally, L60x6 angles serve as horizontal bracings on the second level to ensure enough plan rigidity. While the first story features a composite deck comprising steel corrugated sheets and a 10 cm thick reinforced concrete slab, at the roof level the steel sheeting is simply attached to the beams, with insulation, waterproofing, and a lightly reinforced screed. Fig. 3 shows the structural details of some pinned beam-to-column joints. 120x15 mm and 80x10 mm steel plates constitute the bracing system on the first and second storeys, respectively, connected to the columns via gusset plates as detailed in Fig. 4. The foundation system comprises a grid of beams that also serve as supports for the facade panels. The connection between the steel columns and the concrete basement is ensured by a base joint featuring a 300 mm x 300 mm plate anchored to the concrete base using four M20 anchor bolts.

Fig. 1. 3D representation of the structure in SAP2000 (CSI, 2021).

Fig. 2. (a) First storey plan view; (b) Second storey plan view.