PERBAIKAN BALOK BETON BERTULANG YANG TELAH MENGALAMI BEBAN PUNCAK DENGAN BAJA SIKU
ABSTRACT: Reinforced concrete
beam can crack caused of load which is bigger than its capacity. It need
aneffort to repair the beam, so the crack appearance and beam failure can be prevented.
One of theways to repair is by installation of angel steel beam on out side of
beam.The aim of research is to analyze flexural behavior of repaired reinforced
concrete beam. Thebehavior contents : flexural strength, crack pattern, and
displacement. The dimension of beam is120 mm x 185 mm x 1550 mm which was
charged until crack and failed. There are 3 types ofangel steel beam : (50 x 50
x 5) mm, (40 x 40 x 4) mm, (30 x 30 x 3), that are installed in 3positions
based on the eccentricity angel steel beam : behind of beam, inside of beam on
bottomside, and beside of beam. Dynabolt, 6.5 cm of length and 8 mm of
diameter, is installed 3 pieces in500 mm of distance. The sample is charged on
2 points at 1/3 of span.The results show up that the installation of angel
steel beam can increase the flexural strengthcompared to flexural strength rest
in reinforced concrete beam which had failed, even the originalone. The new
crack are appear at around of dynabolt placed that descript there is force
transferfrom concrete beam to angel steel beam. The displacement is less than
original beam that showup the toughness also increase.
Penulis: Masdar Helmi
Kode Jurnal: jptsipildd090121