PLoS ONE,
Год журнала:
2023,
Номер
18(8), С. e0290248 - e0290248
Опубликована: Авг. 17, 2023
Coulomb
friction
is
considered
as
a
mechanical
approach
to
diminish
the
structural
responses
during
excitations.
However,
in
case
of
severe
oscillations
supplementary
mechanisms
are
employed
besides
mitigate
destructive
effects
vibrations
structures.
Therefore,
main
goal
this
research
develop
new
Hybrid
System
(HS)
which
parallel
combination
Viscous
Damping
(VD)
and
for
structures
subjected
dynamic
load.
To
achieve
goal,
effect
viscous
damper
embedded
equation
motion
proposed
by
Den
Hartog
Single-Degree-of-Freedom
(SDOF)
system,
has
been
extensively
implemented
past
few
decades.
In
numerical
example
study,
implementing
HDM
system
resulted
decreasing
maximum
displacement
range
1%
98%
different
amounts
force
amplitude
damping
ratios.
Also,
applying
increased
time
lag
about
up
24%
frequency
ratios
greater
than
1.
The
developed
hybridized
study
can
be
utilised
generation
Tuned
Mass
Damper
(TMD)
improve
their
energy
dissipating
efficiency
under
PLoS ONE,
Год журнала:
2024,
Номер
19(10), С. e0312503 - e0312503
Опубликована: Окт. 29, 2024
Research
on
the
SSI
effect
flat
sites
has
yielded
many
valuable
conclusions.
However,
current
research
impacts
of
various
special
local
terrains
structural
dynamics
remains
limited.
For
mountainous
areas,
it
is
common
to
construct
houses
in
a
multi-step,
climbing,
and
laterally
staggered
architectural
form
that
follows
mountain
terrain.
Only
through
analysis
combined
action
upper
lower
parts
can
seismic
performance
this
type
be
better
revealed;
considering
influence
effects
will
closer
actual
effects.
Therefore,
identify
damage
factors
mid-story
isolated
stilted
structures
under
earthquakes
provide
optimized
design
plans
for
structures,
six
models
are
established
three
slopes
two
types
foundations
based
engineering
case
Chongqing,
China.
Through
elastic-plastic
time-history
down
transverse-slope
directions,
concludes,
compared
with
not
SSI,
response
areas
amplified.
With
increase
slope,
increases,
amplification
coefficients
between
1–1.8.
The
without
concentrated
around
1,
which
less
influenced
by
slope.
layer
mainly
column
beam
end,
maximum
appears
short
columns.
foundation
soil
stress
increases
Journal of Vibration and Control,
Год журнала:
2023,
Номер
30(13-14), С. 2959 - 2970
Опубликована: Июль 5, 2023
The
tuned
mass
damper
(TMD)
is
a
classical
device
interesting
for
reducing
deformations
between
DOFs
without
physically
connecting
them.
However,
it
has
practical
limit
due
to
the
increase
in
required
improving
its
performance.
A
building
(BMD)
uses
mode
coupling
make
upper
substructure
of
chain-like
structure
behave
as
TMD
lower
substructure,
which
avoids
adding
structure.
Unfortunately,
near-uniform
structures
require
isolation
tuning
BMD,
making
impractical
retrofitting
existing
since
an
in-series
intervention.
This
paper
proposes
and
evaluates
using
inerter,
instead
isolating
control
vibrations
through
From
analytical
numerical
study,
was
found
significant
reduction
by
implementing
solely
inerter
substructure.
inerter-based
approach
showed
similar
performance
BMD
with
advantage
being
in-parallel
Therefore,
this
constitutes
retrofit
improve
dynamic
behavior
excessive
whose
functionality
or
esthetics
would
be
compromised
if
devices
were
installed
it.
Journal of Vibration and Control,
Год журнала:
2024,
Номер
unknown
Опубликована: Март 14, 2024
Compared
with
traditional
tuned
mass
damper
(TMD),
non-traditional
(NTMD)
has
higher
damping
efficiency
in
some
conditions.
Nevertheless,
the
analytical
optimization
problem
of
NTMD
not
been
well
solved;
especially,
multiple
optimal
solutions
are
discussed.
In
this
study,
closed-form
expressions
using
tuning
stiffness
derived
based
on
H
2
norm
optimization.
And
vibration
mitigation
performance
is
evaluated
considering
dual-solutions
situation
subjected
to
typical
ground
motion
and
impulse
excitation.
Different
from
solving
unique
frequency
ratio,
there
exist
two
sets
ratio
spring
elements
for
given
effective
also
limited
as
1/3.
The
or
isolation
robustness
optimized
far
superior
lower
ratio.
larger
can
be
seen
an
form
Maxwell
model
additional
mass.
Hence,
a
large
stiffness,
namely,
design
recommended,
which
different
TMD.
case
adopted
when
demands
practical
engineering
met
parameters
small
stiffness.
compromise
scheme
provided,
combination
but
less
than
maximum
limit
value
1/3
very
exceeded
0.5
according
engineering.
