Buildings,
Journal Year:
2024,
Volume and Issue:
14(12), P. 4040 - 4040
Published: Dec. 19, 2024
Ultra-high-performance
concrete
is
widely
used
in
bridge
strengthening
to
improve
mechanical
performance
and
durability.
Interfacial
bonding
a
key
factor
ensuring
the
effectiveness
of
ultra-high-performance
strengthening.
The
bending
test
UHPC–NC
composite
structure
was
carried
out
this
article.
effects
groove
treatment
type
epoxy
resin
were
considered
discuss
damage
modes,
load–deflection
relationships,
strengths.
interfacial
tensile
strength
distribution
pattern
cracks
clarified.
results
showed
that
(a)
only
22.2%
groove-treated
specimens
failed
due
surface
failure,
indicating
has
high
degree
reliability;
(b)
with
an
adhesive
interface
lowest.
It
21%
higher
than
pure
normal
specimen,
effective
synergistic
force
cannot
be
achieved;
(c)
treated
positive
trapezoidal
keyway
exhibited
highest
strength,
increase
approximately
200%
compared
specimens.
right-angled
inverted
grooves
increased
by
100%
Based
on
established
three-dimensional
numerical
model
analysis
under
economic
safe
conditions,
specimen
exhibits
superior
bonding–tensile
performances.
Buildings,
Journal Year:
2024,
Volume and Issue:
14(12), P. 4040 - 4040
Published: Dec. 19, 2024
Ultra-high-performance
concrete
is
widely
used
in
bridge
strengthening
to
improve
mechanical
performance
and
durability.
Interfacial
bonding
a
key
factor
ensuring
the
effectiveness
of
ultra-high-performance
strengthening.
The
bending
test
UHPC–NC
composite
structure
was
carried
out
this
article.
effects
groove
treatment
type
epoxy
resin
were
considered
discuss
damage
modes,
load–deflection
relationships,
strengths.
interfacial
tensile
strength
distribution
pattern
cracks
clarified.
results
showed
that
(a)
only
22.2%
groove-treated
specimens
failed
due
surface
failure,
indicating
has
high
degree
reliability;
(b)
with
an
adhesive
interface
lowest.
It
21%
higher
than
pure
normal
specimen,
effective
synergistic
force
cannot
be
achieved;
(c)
treated
positive
trapezoidal
keyway
exhibited
highest
strength,
increase
approximately
200%
compared
specimens.
right-angled
inverted
grooves
increased
by
100%
Based
on
established
three-dimensional
numerical
model
analysis
under
economic
safe
conditions,
specimen
exhibits
superior
bonding–tensile
performances.
