GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 2.2 GNGTS 2024 maximum shear obtained is increased. Among all cases, the TF-CLT-S is the one more similar to the ideal behavior of a rigid diaphragm, as already noted in (Gubana and Melobo 2021a). Table 2 – Influence of the reinforcement of the floors on the base shear F max and on the maximum displacement d max with respect to the TF-UR-NG case. Conclusions Pushover numerical analyses to evaluate the influence of the in-plane strengthening of Cmber floors were carried out on a historical masonry Villa. Three cases of reinforcement with OSB and CLT panels, with nails and screws, were considered, and their performances were compared with two unreinforced cases. The equivalent sCffness of the floors was assumed from experimental tests. The invesCgaCon confirms the capacity of the reinforced floors to limit the out-of-plane bending of the Villa's façade. The incidence of out-of-plane on the total displacement varies from 20-46% in the unreinforced case to 7-15% in the case reinforced with OSB panels and screws. This reducCon indicates that it is possible to avoid the acCvaCon of local out-of-plane mechanisms with a Cmber reinforced floor. Furthermore, the proposed sCffening intervenCons allows to obtain a slight increase in the maximum base shear, between 2% and 25% with respect to the unreinforced case. GROUP 1 GROUP 2 PosiCve NegaCve PosiCve NegaCve ΔF max [%] Δd max [%] ΔF max [%] Δd max [%] ΔF max [%] Δd max [%] ΔF max [%] Δd max [%] TF-UR-G -8.6 131.2 -28.7 47.6 -16.7 24.7 -5.6 74.7 TF-UR- NG - - - - - - - - TF-OSB- N 7.0 -33.2 12.0 -16.7 5.7 -24.4 1.8 -35.5 TF-OSB- S 7.9 -37.4 14.4 -21.7 7.1 -29.4 8.8 -25.1 TF-CLT-S 5.5 -25.8 24.6 34.8 4.4 -19.4 10.4 17.5 TF-RIGID 91.0 83.0 48.2 -34.6 37.4 52.7 22.6 -21.9