Ain Shams Engineering Journal,
Год журнала:
2024,
Номер
15(9), С. 102927 - 102927
Опубликована: Июнь 25, 2024
This
paper
aims
to
explore
the
effects
of
earthquakes
on
properties
medium-height
reinforced
concrete
houses
in
China.
The
results
demonstrated
a
significant
decrease
ultrasonic
resonance
frequency,
indicating
structural
damage,
with
reductions
26.5
%,
30.2
and
37
%
observed
for
magnitudes
5.0,
5.3,
5.7,
respectively.
Similarly,
dynamic
modulus
elasticity
exhibited
reduction
over
50
%.
Measurements
carbonation
depth
revealed
values
34.65
mm,
38.97
46.12
mm
Accordingly,
percentage
mass
loss
amounted
22.17
36.87
49.78
Furthermore,
experiments
identified
least
favourable
outcomes
during
maximum
seismic
activity,
recorded
peak
stress
447.3
MPa
at
deformation
0.63
mm.
These
findings
contribute
better
understanding
impact
events
structures
associated
corrosion
mechanisms.
Journal of Quality Assurance in Hospitality & Tourism,
Год журнала:
2024,
Номер
unknown, С. 1 - 57
Опубликована: Май 31, 2024
The
study
investigates
the
interplay
between
tourism
economy
and
technological
innovation
in
China's
coastal
provinces
cities,
uncovering
dynamics
of
regional
sub-regional
coupling
coordination
from
2014
to
2022.
Empirical
findings
indicate
that
overall
degree
among
11
cities
exhibited
a
rising
trend
significant
imbalance
good
2019,
but
underwent
fluctuations
due
impact
COVID-19
2020
Sub-regional
analysis
reveals
dynamic
changes
such
as
Yangtze
River
Delta,
Bohai
Rim,
Pearl
highlighting
coupling,
coordination,
competition
these
economic
zones.
results
suggest
alliances
can
be
established
promote
integration
development
with
areas,
while
emphasizing
active
support
measures
by
local
central
governments
for
long-term
development.
PLoS ONE,
Год журнала:
2024,
Номер
19(7), С. e0304562 - e0304562
Опубликована: Июль 31, 2024
The
study
of
spatio-temporal
evolution
characteristics
and
factors
affecting
the
coordinated
development
population
green
economy
(CD_PGE)
in
Shandong
province,
China,
has
significant
decision-making
implications
for
promoting
high-quality
sustainable
regional
development.
Based
on
2001
to
2020
panel
data
each
city
economic
zone
this
paper
constructs
an
evaluation
model
CD_PGE
systems.
Using
growth
elasticity
models,
geographic
concentration
kernel
density
estimation
spatial
autocorrelation,
analysis
Province
from
perspective
agglomeration
coupling,
temporal
coupling
coordination
patterns,
evolutionary
characteristics.
In
addition,
we
use
fixed
effect
models
quantile
empirically
test
effects
demographic
results
show
that:
(1)
terms
demo-graphic
characteristics,
Shandong’s
trends
are
good,
but
there
still
many
challenges.
(2)
According
time
series
distribution
degree
is
rise,
level
distinct.
(3)
From
dynamical
grid
CD_PGE,
characterized
by
clustering,
with
large
differences.
(4)
impact
factor
perspective,
both
market
mechanisms
government
intervention
have
a
direction
extent
vary.
Ain Shams Engineering Journal,
Год журнала:
2024,
Номер
15(9), С. 102927 - 102927
Опубликована: Июнь 25, 2024
This
paper
aims
to
explore
the
effects
of
earthquakes
on
properties
medium-height
reinforced
concrete
houses
in
China.
The
results
demonstrated
a
significant
decrease
ultrasonic
resonance
frequency,
indicating
structural
damage,
with
reductions
26.5
%,
30.2
and
37
%
observed
for
magnitudes
5.0,
5.3,
5.7,
respectively.
Similarly,
dynamic
modulus
elasticity
exhibited
reduction
over
50
%.
Measurements
carbonation
depth
revealed
values
34.65
mm,
38.97
46.12
mm
Accordingly,
percentage
mass
loss
amounted
22.17
36.87
49.78
Furthermore,
experiments
identified
least
favourable
outcomes
during
maximum
seismic
activity,
recorded
peak
stress
447.3
MPa
at
deformation
0.63
mm.
These
findings
contribute
better
understanding
impact
events
structures
associated
corrosion
mechanisms.
