PSI - Issue 78

Gennaro Magliulo et al. / Procedia Structural Integrity 78 (2026) 1847–1854

1852

Fig. 3. Test configuration and cleanroom specimen positioned on the shake table for dynamic assessment, Magliulo et al. 2024.

To ensure methodological and analytical consistency, a unified systematic analysis framework was defined, employing homogeneous performance metrics and modeling strategies for both rocking blocks (RBs) and SDOF systems. This choice avoids fragmentation of methods and promotes coherent application of results. The simulations performed involve nonlinear dynamic analyses integrated with damage assessments, using both ground acceleration records and measured floor slab accelerations as inputs to faithfully reproduce the actual stresses experienced by the components. The study also examined the influence of geometric variables (e.g., dimensions, heights) and dynamic parameters (e.g., natural period, stiffness) of the components, testing solutions both in ordinary buildings and strategic structures located in various Italian areas characterized by different seismic hazard levels. The seismic capacity was described through fragility curves and capacity surfaces, offering a multidimensional representation of vulnerability. To facilitate the dissemination of results and practical applicability, elaborated tools—both visual and tabular— have also been developed, allowing for the rapid estimation of critical conditions and their associated seismic safety factors. These tools prove particularly useful in contexts where parametric uncertainty (geometric, energetic) is high. The results indicate that the proposed approach could provide a solid foundation to unify the design and verification criteria for non-structural elements, with significant advantages in terms of reliability and operational consistency. Further details are available in the article by Magliulo et al. (2024). 4.2. Piping networks: in-depth numerical analysis and seismic damage modeling Particular attention has been devoted to the study of the seismic response of critical piping networks within hospital environments, focusing on systems for medical gas distribution and fire protection. In this context, the study by Blasi et al. (2023) provided a significant contribution through NLTHA (Non-Linear Time History Analysis) simulations aimed at understanding the damage mechanisms affecting joints, supports, and anchors under seismic loading. Specifically, two geometric configurations were modeled for each piping system: a regular layout (with a limited number of changes in direction and compact geometry) and an irregular layout (characterized by higher geometric