Issue 51

C. Anselmi et alii, Frattura ed Integrità Strutturale, 51 (2020) 486-503; DOI: 10.3221/IGF-ESIS.51.37 497 Feature (c): absence/presence of window openings in the drum With reference to the cases 1 and 2 shown in bold in Tab. 1, for the dome analyzed without failure at ribs and without windows (case 1 shown in Fig.13) the multiplier α is equal to about 24, while with a window the value decreases to about 14 (case 2 shown in Fig.14). Figure 13 : Collapse mechanism for case 1 (no failure at ribs / Lf=0 / Nh=0 / sT=1.5 / multiplier α=24.129) Figure 14 : Collapse mechanism for case 2 (no failure at ribs / Lf=2 / Nh=0 / sT=1.5 / multiplier α=14.224) Feature (a): lack/presence of interlocking between the bricks at the ribs; For the same dome with window (case 2 shown in Fig.14) in case of possible failure at ribs the multiplier value decreases from 14 to about 3 (case 7 shown in Fig.15).