Issue 46

L.U. Argiento et alii, Frattura ed Integrità Strutturale, 46 (2018) 226-239; DOI: 10.3221/IGF-ESIS.46.21

 n n ci



n



1

ci

gi k    F S vhb

ci

f 

(5)

i

2



k

1

  

  



i

i

1

j  



j j n b h n vf   ci

( F n n b h    )

q  

(6)

qi

i

ci

i





j

j

1

1

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:

N

N

1 i F F F       1 gi i

(7)

qi

230