INTERAKSI ANTARA GAYA AKSIAL DAN MOMEN PADA KOLOM BETON DENGAN TULANGAN BAMBU

Abstract

The use of bamboo reinforcement in reinforced concrete structure has not
been investigated extensively. The material is expected as an alternative of steel reinforcement
in a certain condition. Therefore, this research is conducted to investigate
the capacity of columns reinforcing using bamboo in term of their axial strength and
moment as well as their interactions.
Twelve columns reinforcing of bamboo are made and tested. Column dimensions of
150 mm x 150 mm x 900 mm were cast using 15 MPa concrete obtained from ASTM
standard cylinder test of age of 28 days. Two group specimens based on its total reinforcement
areas were made namely 400 mm2 and 600 mm2. Six variations were made
for each group to incorporate variation of applied load eccentricities during the test.
The load eccentricities were 0 (pure axial), 70 mm, 100 mm, 150 mm, 200 mm and ¥
(pure bending).
Test results show that the experimental interaction between axial force and bending
moment of the column reinforced with bamboo agree well with the analytical results
following the expression for column reinforced with steel reinforcement. Taking the
tensile strength of the bamboo 50% of the rupture strength, give the experimental
column capacities were close to the analytical results.