Structural Engineering International,
Journal Year:
2023,
Volume and Issue:
34(2), P. 233 - 239
Published: Dec. 19, 2023
Seismic
isolation
aims
to
prevent
the
direct
transmission
of
seismic
wave
energy
main
resistant
structure.
Typically,
this
is
achieved
by
using
a
flexible
support
system
that
isolates
base
structural
from
ground,
absorbing
relative
deformation
at
soil–structure
interface.
Meanwhile,
structure
tends
move
as
rigid
body
on
support.
This
article
proposes
an
alternative
approach
for
dynamic
characterization
shredded
rubber,
which
used
in
geotechnical
(GSI).
Traditional
testing
methods
are
expensive
and
require
specialized
equipment,
making
them
less
practical
routine
determination.
The
details
most
important
parameters
needed
evaluate
applicability
effectiveness
material
context
GSI.
parameter
interest,
i.e.
transverse
elasticity
module
GR,
was
calibrated
numerically
experimental
model
column
rubber
subjected
free
vibrations
tests.
results
were
consistent
with
those
obtained
resonant
hollow
cylinder
In
way,
it
shown
presented
capable
providing
valid
estimations
modulus
rubber.
Journal of Earthquake Engineering,
Journal Year:
2024,
Volume and Issue:
28(9), P. 2422 - 2439
Published: Feb. 12, 2024
This
paper
provides
new
and
useful
insights
into
the
performance
efficiency
of
geotechnical
seismic
isolation
(GSI)
systems
with
gravel-rubber
mixtures
containing
10%,
25%
40%
volumetric
rubber
content
(VRC).
Finite
element
numerical
models
were
developed
in
OpenSees
subjected
to
sinusoidal
ground
motions
varying
input
base
acceleration
frequency.
The
best
was
attained
for
VRC
=
at
a
frequency
8
Hz.
Using
newly
GSI
index,
energy
dissipation
found
vary
between
good
excellent,
while
that
10%
is
poor.
Geosynthetics International,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 21
Published: April 18, 2025
Rubber-sand
mixture
(RSM)
has
proven
to
be
a
cost-effective
fill
material,
serving
as
seismic
isolation
cushion
between
natural
site
soil
and
structure
foundations.
Although
the
effect
improves
with
increased
thickness,
stability
of
superstructure
tends
decrease
while
costs
rise
greater
thickness.
Hence,
it
is
crucial
minimize
thickness
attaining
optimal
objective.
This
study
experimentally
assesses
performance
thinner
RSM
cushions
reinforced
by
geosynthetics,
specifically
geocells,
geotextiles,
geogrids.
The
effects
mass,
excitation
mode
on
coefficient
geosynthetic-reinforced
rubber-sand
(GRRSMC)
are
thoroughly
evaluated.
results
indicate
that
exceeds
unreinforced
ones
same
Among
different
reinforcements,
geotextile
provides
highest
efficiency,
followed
geocell
geogrid.
GRRSMC
primarily
attributed
low
shear
modulus.
Additionally,
geosynthetic
reinforcement
enhances
vertical
modulus,
which
helps
attenuate
waves.
These
findings
validate
viable
low-cost
approach,
ensuring
stability,
reducing
Bulletin of Earthquake Engineering,
Journal Year:
2024,
Volume and Issue:
22(4), P. 2001 - 2023
Published: Jan. 9, 2024
Abstract
Geotechnical
seismic
isolation
(GSI)
is
a
new
category
of
low-damage
resilient
design
methods
that
are
in
direct
contact
with
geomaterials
and
which
the
mechanism
primarily
involves
geotechnics.
Various
materials
have
been
explored
for
placing
around
foundation
system
layer
form
to
facilitate
beneficial
effects
dynamic
soil-foundation-structure
interaction,
as
one
GSI
mechanisms.
To
reduce
thickness
ensure
uniformity
its
material
properties,
use
thin
homogeneous
high-damping
polyurethane
(HDPU)
was
investigated
this
study
via
centrifuge
modelling.
HDPU
sheets
were
installed
three
different
configurations
at
interface
between
structural
surrounding
soils
realising
GSI.
It
found
using
can
provide
excellent
all
configurations.
The
average
rates
demand
reduction
amongst
eight
earthquake
events
ranged
from
35
80%.
A
clear
correlation
period-lengthening
ratio
percentage
be
observed
One
periphery
only
particularly
suitable
retrofitting
existing
structures
does
not
require
making
changes
systems
or
architectural
features.
Infrastructures,
Journal Year:
2024,
Volume and Issue:
9(11), P. 202 - 202
Published: Nov. 11, 2024
This
paper
proposes
a
method
to
investigate
the
design
properties
of
geotechnical
seismic
isolation
(GSI).
technique
has
been
object
many
research
contributions,
both
experimental
and
numerical.
However,
methods
that
may
be
used
by
practitioners
for
procedures
are
still
unavailable.
The
formulation
presented
herein
preliminary
assessments
two
important
properties:
thickness
shear
wave
velocity.
Three-dimensional
advanced
numerical
simulations
were
performed
with
state-of-the-art
platform
OpenSees
in
order
verify
analytical
on
benchmark
case
study.
elongation
ratio
taken
as
relevant
parameter
discuss
efficiency
GSI
decoupling
soil
from
structure.
main
findings
consist
assessing
dependency
parameters:
velocity
layer.
In
this
regard,
novel
was
proposed
make
can
practical
applications.
