PENINGKATAN DAYA DUKUNG DAN DAKTILITAS BALOK BETON BERTULANG DENGAN MENGGUNAKAN PERKUATAN CFRP (CARBON FIBER REINFORCED POLYMER)
ABSTRACT: This paper presents a research
on the ductility
of normal-strength concrete
beams which were designed
under gravity load only. The beams were then strengthened with CFRP. The
ductility of the strengthened beams was compared with that without
CFRP. The analytical study employed the
formulas proposed by
Mander, Fardis, Pullido,
and ACI Committee 440. The
beams considered in the study were
taken from a Moment Resisting
Frame System (MFRS) which neglected the seismic loading.
The behavior of the beam
section at the
column face was simulated
with that at the
midspan which possessed the same flexural
and shear reinforcements as that
at the end
section. The beams
were then wrapped with two layers of CFRP. The result of the experiment
was the significant improvement in the curvature ductility of the beams
strengthened with two-layered CFRP compared with that without CFRP. The
increase in ductility was about 265 percent. The shape of the moment-curvature
relation M– from the experiment was similar to
that obtained from the analytical study by Mander, Fardis, Pullido, and
ACI Committee 440. The curvature ductility of the beams strengthened with
two-layered CFRP could reach up to beyond 30. According to Park and Paulay
(1975), this value satisfies the full ductility requirement for seismic design.
Thus, it can be used for strengthening the seismic-resistant structures.
Keywords: CFRP, ductility,
reinforced concrete beam
Penulis: Tavio, R. Purwono,
dan A. Rosyidah
Kode Jurnal: jptsipildd090004
