PENGGUNAAN CARBON FIBER REINFORCED PLATE SEBAGAI BAHAN KOMPOSIT EKSTERNAL PADA STRUKTUR BALOK BETON BERTULANG
ABSTRACT: The flexural
strengthening of reinforced concrete beam can be considered with applied
externally bonded steel plate or carbon fiber composite. This external plate is
bonded to the tension face of the concrete beam. Experimental study on reinforced concrete
strengthening with Carbon Fiber Reinforced Plate (CFRP)
has been conducted
to estimate the effectiveness of
using CFRP on the
concrete structure as flexural
strengthening material and external reinforcement. Two beams
were provided in
this study to
test the flexural
strengthening effect of
externally bonded CFRP composite. One of
them was used
for normal condition (BT). The other
specimen is the
reinforced concrete beam with
single steel reinforcement and
laminated CFRP (BTF). On the
second beam, CFRP laminated on
the bottom of
beam with epoxy. Dimension of the beams are 150/250 mm
with effective length 1900 mm. All beams were tested using two-point loading to
get pure bending in the middle span. The result of the experimental research
showed that the ultimate load of the beam with externally bonded CFRP(
BTF) is 49% higher than BT; stiffness of
the strengthened beam BTF is 68% higher than BT; and cracking moment of the
strengthened beam BTF is 50% higher than BT. However, the deformation and
ductility of the strengthened beam BTF
is lower than BT 77.6% and 73% respectively.. The failure phenomenon of
the concrete beam with laminated CFRP is prior debonding CFRP that makes
maximum performance of the CFRP not be reached.
Key words: Carbon Fiber
Reinforced Plate (CFRP), flexural strengthening, reinforced concrete beam,
debonding failure
Penulis: Endah Kanti
Pangestuti
Kode Jurnal: jptsipildd090019
