PSI - Issue 44

Giuseppe Brandonisio et al. / Procedia Structural Integrity 44 (2023) 1316–1323 Giuseppe Brandonisio et al. / Structural Integrity Procedia 00 (2022) 000–000

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shear walls bear the 30%, the remainder is distributed among the pillars. As visible from previous results, the seismic vulnerability of the existing structure is strictly related to the behaviour of R.C. components, i.e., the pillars at the first level and the shear walls, extending for all levels. These elements undergo crisis for seismic action defined in accordance with the current building code (NTC2018). On the contrary, the upper deformable steel portion does not present particular structural criticalities.

Fig. 2. 3D- F.E. models of the building ca study: (a) CDS and (b) SAP2000.

Fig. 3. Shear distribution at the 3 rd level, for seismic force in x-direction (a) and y-direction (b).

Fig. 4. Shear distribution at the 2 nd and 3 rd level, for seismic force in x-direction (a) and y-direction (b).

To give an approximate evaluation of the seismic vulnerability of the structure case study, seismic analyses and verifications have been performed. In this case, it has been considered an action associated with a PGA of 10% and