Frontiers in Materials,
Год журнала:
2024,
Номер
11
Опубликована: Март 26, 2024
To
address
the
challenges
related
to
lengthy
construction
period,
complex
maintenance
requirement,
and
elevated
risk
of
shrinkage
cracking
associated
with
cast-in-place
UHPC
reinforcement
orthotropic
steel
bridge
decks.
This
paper
proposes
a
novel
solution
that
prefabricated
ultra-high-performance
concrete
(UHPC)
slab
epoxy
bond
connection
is
used
as
layer
for
Four
sets
bending
tests
on
composite
deck
were
carried
out
compare
flexural
performance
decks
under
different
joint
forms
loading
patterns.
The
results
indicate
precast
delaminated
from
bonding
without
failure
itself
in
all
cases.
positive
capacity
jointless
approximately
27.67
kN,
while
negative
around
16.58
kN.
For
deckwith
adhesive
joints
(EA-J-Ln),
2.54
area
reinforced
carbon
fiber
cloth
(EA-JC-Ln)
increased
4.17
Therefore,
use
can
significantly
improve
resistance
joints.
Finally,
numerical
model
based
Cohesive
Zone
Model
(CZM)
was
established,
validating
applicability
this
simulation
method
deck.
Buildings,
Год журнала:
2025,
Номер
15(5), С. 812 - 812
Опубликована: Март 4, 2025
Ultra-high-performance
fiber-reinforced
concrete
(UHPFRC)
has
the
characteristics
of
high
strength,
toughness,
and
excellent
crack
resistance.
In
order
to
fully
utilize
high-strength
properties
UHPFRC
reduce
structural
weight
construction
cost,
solid
slabs
can
be
fabricated
into
hollow-core
or
composite
sandwich
slabs.
further
analyze
mechanical
mechanism
action
slabs,
one
slab
two
with
same
geometric
dimensions,
reinforcement,
steel
fiber
volume
content
are
designed
in
this
paper,
their
stress
performance
under
a
static
load
was
investigated
using
four-point
bending
test.
The
research
results
show
that
is
anisotropic,
stiffness
section
parallel,
distributed
tubes
slightly
smaller
than
slab.
addition
fibers
greatly
limit
development
cracks
on
surface,
so
elastic
hollow
higher
conventional
whole
process
roughly
divided
stage,
elastic–plastic
plastic
stage;
bottom
classified
cracking
stable
rapid
propagation
stage.
cross-sectional
deformation
still
satisfies
assumption
flat
section.
A
row
round
neutral
axis
little
effect
load,
bearing
capacity,
capacity
By
conducting
comparative
analysis
rate
when
reaches
13.57%,
comprehensive
reduced
by
13.16%,
moment
reduced,
ultimate
only
8.78%.
Under
premise
meeting
appropriately
increased
save
money
energy.
Case Studies in Construction Materials,
Год журнала:
2024,
Номер
20, С. e02900 - e02900
Опубликована: Янв. 22, 2024
A
novel
embedded
GFRP
grid
framework-UHPC
composite
plate
without
steel
rebar
was
proposed
to
solve
the
problems
of
conventional
reinforced
concrete
plate,
such
as
heavy
weight,
easily
cracking
and
poor
durability.
The
is
expected
be
superior
in
mechanical
mechanism
durability
benefiting
from
combination
UHPC
GFRP,
only
minimal
construction
process
needed.
flexural
properties
varying
centroid
height
loading
shear
span
ratio,
were
investigated
via
four-point
tests.
failure
mode,
load-deflection
curve,
sectional
strain
ductility
analyzed.
Experimental
results
showed
that
could
divided
into
three
stages:
elastic
stage,
working
stage
with
cracks
descent
stage.
characterized
by
tensile
fracture
grid.
bearing
capacity
stiffness
can
significantly
improved,
since
GRFP
more
completely
tensioned
framework
fell.
maximum
plates
reach
317.9
kN
when
distance
between
bottom
25
mm
ratio
1.5.
Shear
observed
0
Finite
element
(FE)
models
established
considering
both
geometric
material
nonlinearities
further
analyze
plate.
reliable
connection
additional
connector
proved,
numerical
coincided
well
experimental
ones.
Finally,
calculation
method
introducing
stress
distribution
non-uniformity
coefficient
predict
