To
investigate
the
seismic
wave
propagation
mechanism
in
bench
bedding
rock
slopes,
a
comprehensive
approach
combining
shaking
table
tests
and
numerical
simulations
is
employed.
The
primary
focus
of
study
to
analyse
energy
distribution
characteristics
using
time-frequency
analysis.
findings
research
demonstrate
that
slope
displays
an
acceleration
elevation
amplification
effect,
indicating
heightened
susceptibility
top
excitation.
factor
(AAF)
exhibits
increasing
trend
with
frequency
sinusoidal
at
each
monitoring
point.
maximum
AAF
observed
input
approximately
25
Hz,
followed
by
gradual
decrease
for
frequencies
exceeding
Hz.
Furthermore,
increase
peak
results
slope's
natural
damping
ratio,
as
ascertained
through
transfer
function
These
changes
signify
accumulation
damage
within
alterations
waves.
Moreover,
analysis
reveals
majority
concentrated
low-frequency
range.
However,
increased,
there
was
proportion
range,
accompanied
high-frequency
significant
enhance
understanding
behavior
waves
thereby
contributing
improved
hazard
assessment,
dynamic
response
evaluation,
failure
comprehension.
Journal of Earthquake Engineering,
Год журнала:
2024,
Номер
28(9), С. 2422 - 2439
Опубликована: Фев. 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.
Bulletin of Earthquake Engineering,
Год журнала:
2024,
Номер
22(4), С. 2001 - 2023
Опубликована: Янв. 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.
Geosynthetics International,
Год журнала:
2025,
Номер
unknown, С. 1 - 21
Опубликована: Апрель 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
Infrastructures,
Год журнала:
2024,
Номер
9(11), С. 202 - 202
Опубликована: Ноя. 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.
