Ali, Irfan, Assi, Rola et Muciaccia, Giovanni.
2026.
« Effects of non-structural walls on vertical floor acceleration demands: A case study ».
In XX ANIDIS Conference (Assisi, Italia, Sept. 07-11, 2025)
Coll. « Procedia Structural Integrity », vol. 78.
pp. 1126-1133.
Elsevier.
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Résumé
Non-structural components (NSCs) are highly susceptible to seismic damage, often driving major economic losses. This vulnerability is exacerbated in near-fault zones, where vertical ground motions can exceed horizontal components, challenging conventional NSC design approaches and amplifying safety risks. This study investigates how different non-structural wall configurations affect vertical floor acceleration demands and quantifies the corresponding demands on suspended ceilings. Linear time-history analyses were conducted on various structural models: (bare frame, full frame, two variants of masonry-wall-only frames, and one curtain-wall-only frame) using 65 strong vertical ground motions (>0.25 g). Computed PFAᵥ/PGAᵥ ratios show that masonry-wall only frames with walls on lower stories significantly amplify vertical accelerations on upper floors, with mid-story peaks exceeding 3.6 × PGAv. In contrast, curtain-wall-only frame exhibits more uniform responses. Roof-level amplifications remain moderate (3.0–3.5 × PGAv) across all configurations. Notably, floor level responses exhibited up to 100% variability at different nodes on the same story highlighting the impact of irregular wall distributions. Suspended ceilings experienced, on average, 20% (84thpercentile) higher vertical accelerations than their supporting floor. Based on these findings, two recommendations are proposed: (1) A baseline vertical amplification factor of 3.00×PGAv adjusted for wall configurations and floor location; (2) A 1.20 amplification ratio for estimating suspended ceiling accelerations relative to supporting floor.
| Type de document: | Compte rendu de conférence |
|---|---|
| ISBN: | 2452-3216 |
| Chercheur(-euse): | Chercheur(-euse) Assi, Rola |
| Affiliation: | Génie de la construction |
| Date de dépôt: | 10 mars 2026 15:41 |
| Dernière modification: | 25 mars 2026 21:38 |
| URI: | https://espace2.etsmtl.ca/id/eprint/33447 |
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