Issue 46

L.U. Argiento et alii, Frattura ed Integrità Strutturale, 46 (2018) 226-239; DOI: 10.3221/IGF-ESIS.46.21 230   1 1 2 ci n ci ci gi k i k n n F S vhb f       (5) 1 1 1 ( ) i i qi i ci i j j j ci j j F n n b h q n b h n vf                    (6) Figure 3 : Frictional resistances related to a multi-storey wall. It is easy to verify [22] that F gi is applied at 2/3 from the top of the height H ci since S k linearly increases from the top to the bottom, while F qi is applied at the half of the same height H ci . Hence, if a full activation of the frictional resistances occurs along the all the bed joints crossed by the crack line (pure sliding mechanism), their resultant assumes a maximum value given by: 1 1 N N gi qi i i F F F       (7)