Advances in Civil Engineering,
Journal Year:
2023,
Volume and Issue:
2023, P. 1 - 16
Published: Dec. 16, 2023
This
study
investigates
the
seismic
behavior
of
T-shaped
concrete-filled
steel
tubular
(CFST)
column
to
beam
joints,
aimed
at
expanding
their
applicability
in
areas
with
high-seismic
fortification
intensity.
A
construction
form
CFST
joint
side
plates
is
presented.
The
variables
studied
these
experiments
include
plate
length,
axial
compression
ratio,
presence
plates,
and
binding
bars.
force
mechanism,
failure
modes,
load–displacement
curves,
strength,
stiffness,
ductility,
energy
dissipation
capacity
seven
specimens
were
evaluated
under
low-cycle
reciprocating
load.
experimental
results
demonstrate
that
joints
show
a
full
hysteresis
curve,
ductility
coefficient
ranging
from
1.67
2.49,
equivalent
viscous
damping
between
0.147
0.234.
panel
zone
displays
strong
deformation
capacity.
inclusion
bars
improves
joint.
setting
enables
formation
plastic
hinge
on
beam,
creating
mechanism
satisfying
design
principle
“strong
weak
member”
as
required
by
building
structures.
Buildings,
Journal Year:
2025,
Volume and Issue:
15(9), P. 1432 - 1432
Published: April 24, 2025
Seismic
resilience
is
a
critical
concern
in
the
development
of
prefabricated
concrete
structures.
This
study
investigates
seismic
performance
prestressed
frames
with
mechanically
connected
steel
bars
through
both
experiment
and
finite
element
simulations
using
ABAQUS.
The
research
aimed
to
evaluate
influence
mechanical
connections
on
structural
stiffness,
energy
dissipation
failure
mechanisms,
restoring
force
model
was
developed
based
experimental
numerical
results
provide
theoretical
basis
for
design.
parametric
analysis
verified
shows
that
pretension
can
significantly
enhance
bearing
capacity,
stiffness
deformation
recovery
ability
frames.
peak
load
increased
by
30.8%,
initial
improved
17.4%,
ductility
coefficient
reached
2.82,
residual
rate
reduced
40.7%,
emergence
cracks
delayed,
crack
width
reduced.
Improving
effective
prestress
certain
range
improve
capacity
frame.
Increasing
strength
ratio
longitudinal
reinforcement
beam
column
effectively
With
increase
axial
compression
range,
frame
significantly,
but
decreases.
Based
hysteresis
curve
skeleton
tested,
degradation
law
reinforced
connection
were
fitted,
established.
predicted
value
good
agreement
value,
illustrating
validity
developed.
These
offer
valuable
insights
optimizing
design
frames,
ensuring
balance
between
strength,
earthquake-resistant
Structural Concrete,
Journal Year:
2024,
Volume and Issue:
25(3), P. 1968 - 1987
Published: Jan. 30, 2024
Abstract
To
realize
the
prefabricated
structure
of
special‐shaped
concrete‐filled
steel
tubular
(CFST)
column
frame
and
enhance
level
indoor
room
utilization,
this
paper
proposed
a
novel
with
CFST
columns
H‐shape
beams
connection
side
plate.
investigate
seismic
behavior
structure,
2‐story
2‐bay
specimen
was
fabricated
tested
under
reversed
cyclic
loading.
The
failure
mode,
hysteresis
behavior,
degradation
lateral
stiffness
bearing
capacity,
ductility
energy
dissipation
were
analyzed.
Experiment
results
indicated
that
mode
presented
strong
weak
beams.
Hysteresis
curve
showed
fully
shuttle‐shaped.
mean
story
drift
angle
1/36
at
ultimate
stage.
Equivalent
viscous
damping
coefficient
0.038–0.464.
capacity
relatively
gentle,
but
overall
more
obvious.
It
suggested
had
proper
property.
After
test,
property
test
further
investigated
through
numerical
simulation
approach.
skeleton
obtained
from
nearly
consistent
results,
indicating
analysis
precise
high
reference
meaning.
Case Studies in Construction Materials,
Journal Year:
2024,
Volume and Issue:
20, P. e03069 - e03069
Published: March 20, 2024
The
beam-column
connection
is
both
the
critical
area
and
weak
part
for
prefabricated
reinforced
concrete
(PC)
frame
structure.
ductile
with
a
U-shaped
shell
has
been
well-developed
PC
cross-shaped
connection.
In
this
paper,
two
optimizing
reinforcement
methods
in
U-shell
were
proposed
to
improve
seismic
performance
of
Three
full-scale
connections
designed
produced.
Then,
reversed
cyclic
loading
was
applied
acoustic
emission
(AE)
technology
as
measuring
method
investigate
failure
modes
damage
mechanisms
under
actions.
results
show
that
increasing
connecting
can
effectively
promote
bearing
capacity
components
while
setting
stirrups
enables
improving
energy-dissipating
capacity.
Based
on
variation
AE
hits,
process
be
divided
into
three
stages,
optimization
effects
measures
reflected
at
different
stages.
According
Ib-value
analysis,
it
seen
development
microcrack
propagation
macrocrack
penetration
main
mode
components.
Besides,
k-means
algorithm
used
classify
signals
four
clusters
crack
patterns.
addition,
based
energy
calculation,
prediction
model
constructed
specimens.
Non-destructive
testing
has
many
advantages,
such
as
the
ability
to
obtain
a
large
number
of
data
without
destroying
existing
structures.
However,
reliability
estimation
accuracy
and
limited
range
applicable
targets
remains
an
issue.
This
study
proposes
novel
pin
penetration
test
method
determine
early
age
compressive
strength
concrete
before
demolding.
The
timing
demolding
initial
curing
are
determined
according
development
concrete.
Therefore,
it
is
important
at
actual
construction
site.
applicability
this
methodology
investigated.
Small
holes
(12
mm
in
diameter)
prepared
on
mold
surface
real
sites
mock-up
specimens
advance.
penetrated
into
these
relationship
between
depth.
As
result,
confirmed
that
suitable
measure
allows
benchmark
values
for
strength,
necessary
avoid
frost
damage,
be
directly
verified
structural
members
For
instance,
strengths
greater
than
5
MPa
10
can
by
depths
8.0
6.7mm
or
less,
respectively.
Buildings,
Journal Year:
2024,
Volume and Issue:
14(7), P. 2099 - 2099
Published: July 9, 2024
Non-destructive
testing
has
many
advantages,
such
as
the
ability
to
obtain
a
large
number
of
data
without
destroying
existing
structures.
However,
reliability
estimation
accuracy
and
limited
range
applicable
targets
remain
an
issue.
This
study
proposes
novel
pin
penetration
test
method
determine
early-age
compressive
strength
concrete
before
demolding.
The
timing
demolding
initial
curing
is
determined
according
development
concrete.
Therefore,
it
important
at
early
age
actual
construction
site.
applicability
this
methodology
investigated.
Small
holes
(12
mm
in
diameter)
are
prepared
on
mold
surface
real
sites
mock-up
specimens
advance.
penetrated
into
these
relationship
between
depth.
As
result,
confirmed
that
suitable
for
measuring
allows
benchmark
values
strength,
necessary
avoid
frost
damage,
be
directly
verified
structural
members
For
instance,
strengths
greater
than
5
MPa
10
can
by
depths
8.0
6.7
or
less,
respectively.
