RISA-3D
can
support
the
analysis
of
aluminum
framing
for
glass
curtain
wall
systems
using
its
member
modeling,
loading,
and
custom
section
capabilities.
Although
the
program
does
not
include
dedicated
curtain
wall
tools,
these
existing
features
provide
a
practical
and
customizable
workflow
for
evaluating
framing
forces,
stresses,
and
deflections.
The
following
tips
provide
general
guidance
for
engineers
modeling
a
section
of
curtain
wall,
rather
than
a
prescribed
design
method.
Apply
engineering
judgment
when
selecting
modeling
assumptions,
interpreting
results,
and
completing
external
checks.
Establish
a
Framing
Model
A
framing
only
model
focuses
on
the
structural
members
without
introducing
glass
panel
stiffness.
This
simplifies
the
model
and
allows
the
engineer
to
select
and
verify
an
appropriate
load
distribution
from
the
glass
to
the
framing.
The
glass
stresses,
deflections,
and
capacity
will
be
evaluated
separately.
Draw
structural
members
to
represent
the
curtain
wall
geometry,
and
assign
boundary
conditions
to
reflect
the
assumed
attachment
points.
Review
member
orientation
and
connectivity
before
applying
loads.
Apply
Loading
Area
loads
provide
a
convenient
way
to
apply
loading
to
the
framing.
RISA-3D
distributes
area
loads
to
members
within
the
loaded
region
based
on
the
tributary
area.
Verify
the
load
direction
and
review
the
generated
transient
basic
load
cases
to…
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