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481
IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 4
M. N. KATAOKA
|
A. L. H. C. EL DEBS
Table 6 shows the stiffness obtained in the simulation, including
the comparison with the reference connection. The connection with
beams with thicker flanges, the stiffness was 8% lower. However,
the stiffness for the other two connections with cross section with
wider flanges (section 2) and with thicker flanges and web (section
3), the difference was more significant, reaching approximately 12%.
According to the results of the parametric analysis of the beam cross
section was not possible to take an accurate understanding about
the connection behaviour because of the diameter of the bolts was
not suitable for the beams used. Nevertheless, the fact was impor-
tant to attend
the engineers to the correct connections design.
8. Conclusions
From the comparison between experimental and numerical results,
it was concluded that the two-dimensional modeling portrayed sat-
Figure 21 – Comparison of bending moment versus rotation curves
and envelope curves used for parametric analysis of the slab height
Bending moment versus rotation curves
Envelope curves
Figure 22 – Beams Cross sections used in the parametric analysis
isfactorily the behaviour of the composite connection studied in this
paper, providing advantages such as facility and quickness to cre-
ate the model and reduced processing time.
Related to the parametric analysis, it was performed based on re-
sults of [14]. The diameter of the bolts, the beam cross section and
the slab height were varied. For each parameter were adopted three
variations and when one was changed, all others are maintained
fixed to facilitate the comparisons. The main conclusions were:
n
The use of bolts with larger diameters was the parameter that
most influenced the behaviour of the connection. With the in-
creases of the bolts diameter of 16 mm to 25 mm, at about 50%
of increase, the stiffness increase 15%. The connection with bolts
with 20 mm of diameter did not have change in the stiffness.
n
The variation in the slab height also provided changes in the
behaviour of the connection. When was used the height equal
to 140 mm, the stiffness practically unchanged, but when the