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186
IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 2
Design model and recommendations of column-foundation connection through socket with rough interfaces
2.2 Main vertical reinforcement – A
s,mv
The main vertical reinforcement
A
s,mv
is defined as that distributed
along the corners of the longitudinal and transverse walls. This
reinforcement, shown in Figure 6, has strength function on the ten-
sion side of the connection, but is placed symmetrically at the cor-
ners due to construction aspects.
Based on observation by Canha [4] that rough interface specimens
Figure 4 – (a) Maximum shear key dimensions with respect to
minimum roughness according to NBR 9062:2006 [6] and theoretical
evaluation according to Canha [4]; (b) Minimum shear key dimensions
as a function of aggregate dimension recommended by Canha [4]
e ' = 4 cm
6 cm
4 cm
10 cm
= 6
l
= 45º
sk
h = 1 cm
sk
= 6
l
sk
a
sk
sk
sk
= 6 cm
= 45º
sk
h
a
sk
sk
sk
f
ag
2
f
ag
2
e '
f
ag
f
ag
/2
f
ag
3
f
ag
B
A
Figure 5 – Applied load-main vertical reinforcement strain curve (Canha [4])