...
Benchmark
...
problems
...
from
...
the
...
AISC
...
2017 Specification
...
for
...
Structural
...
Buildings
...
(commentary,
...
page
...
16.1-
...
291)
...
have
...
been
...
reproduced
...
in
...
ETABS.
...
The
...
intention
...
of
...
AISC
...
benchmark
...
problems
...
is
...
to
...
indicate
...
whether
...
or
...
not
...
an
...
analysis
...
software
...
is
...
capable
...
of
...
performing
...
rigorous
...
second
...
order
...
analyses
...
which
...
include
...
P-Δ
...
and
...
P-δ
...
effect.
...
ETABS captures both sources of nonlinear geometry with great accuracy, well within the 3% and 5% limitation of AISC. This capability is validated in the benchmark-problem results, shown below. Meshing the column may be required to improve accuracy of P-δ effect in pinned condition cases and for axial loads close to buckling.
Figure 1 - P-δ response
Figure 2 - P-Δ response
See Also
Attachments
- Case 1 ETABS model (zipped EBD file)
- Case 2 ETABS model (zipped EBD file)