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IBRACON Structures and Materials Journal • 2013 • vol. 6 • nº 3
Numerical analysis of two pile caps with sockets embedded, subject the eccentric compression load
crushing occurs when all compression tensions reach the rupture
superficies, subsequently, the elasticity module has value equal to
zero in all directions. Figure [7] presents the element Solid 65.
In the modeling of the steel bars of the reinforcement it was used
the finite element Link 8. This element has two nodes, so that each
node has three degrees of freedom – translations in the directions
x, y and z. Figure [8] shows this element. We chose this element,
because the armors in the models were discrete.
In the models, it was not considered the phenomenon of the adher-
ence between the steel bars and the concrete. In spite, the results
Table 1 – Pile caps properties analyzed for smooth and rough walls
Pile caps
Total
heigth
h (cm)
A
st
2
(cm )
B
lx
(cm)
B
ly
(cm)
ℓ
emb
(cm)
h
s
(cm)
Measure the
sides of
the column
(cm)
Measure the
sides of
the piles
(cm)
Classification ABNT
NBR 6118:2007
L
ℓ
80h 30NM
e
s
R
ℓ
80h 30NM
e
s
L
ℓ
80h 20NM
e
s
R
ℓ
80h 20NM
e
s
L
ℓ
80h 10NM
e
s
R
ℓ
80h 10NM
e
s
L
ℓ
60h 30NM
e
s
R
ℓ
60h 30NM
e
s
L
ℓ
60h 20NM
e
s
R
ℓ
60h 20NM
e
s
L
ℓ
60h 10NM
e
s
R
ℓ
60h 10NM
e
s
L
ℓ
50h 30NM
e
s
R
ℓ
50h 30NM
e
s
L
ℓ
50h 20NM
e
s
R
ℓ
50h 20NM
e
s
L
ℓ
50h 10NM
e
s
R
ℓ
50h 10NM
e
s
110
100
90
90
80
70
80
70
60
Note: h, total height of the pile cap; A , sum of the areas of the cross sections of steel bars; B , the total size of the pile cap in the longitudinal
st
lx
direction; B , the total size of the pile cap in the transverse direction;
ℓ
, length embed column in pile cap; h , thickness of the bottom slab.
ly
emb
s
22
22
22
22
22
22
22
22
22
240
240
240
240
240
240
240
240
240
84
84
84
84
84
84
84
84
84
80
80
80
60
60
60
50
50
50
30
20
10
30
20
10
30
20
10
40 x 40
40 x 40
40 x 40
40 x 40
40 x 40
40 x 40
40 x 40
40 x 40
40 x 40
30 x 30
30 x 30
30 x 30
30 x 30
30 x 30
30 x 30
30 x 30
30 x 30
30 x 30
Rigid
Rigid
Rigid
Rigid
Rigid
Rigid
Rigid
Rigid
Rigid
Figure 5 – Discretization used in the models
