ABSTRAK
Semakin pesatnya pembangunan pemukiman akibat penduduk yang terus-menerus bertambah, memicu harga bahan bangunan terutama baja tulangan beton semakin naik dan mengalami kelangkaan, sehingga sangat memberatkan masyarakat kalangan menengah ke bawah. Mengatasi hal tersebut, maka dicari bahan alternatif baru sebagai pengganti tulangan baja pada beton diantaranya adalah menggunakan tulangan dari bilah bambu. Penelitian ini bertujuan untuk mengetahui berapa besar kapasitas lentur kolom beton bertulangan bambu wulung dengan takikan sejajar bila dibandingkan dengan kapasitas lentur kolom bertulangan baja dan kapasitas lentur kolom tanpa tulangan.
Metode yang digunakan dalam penelitian ini adalah metode eksperimental laboratorium. Benda uji berupa kolom beton dengan ukuran 150 x 150 mm dan tinggi bersih 1.100 mm. Benda uji dibuat 3 jenis, yaitu kolom beton tulangan bambu wulung dengan takikan sejajar, kolom beton tulangan baja, dan kolom beton tanpa tulangan. Pengujian yang dilakukan dengan menguji kapasitas lentur kolom menggunakan alat loading frame, dengan eksentrisitas beban aksial 200 mm dari sumbu kolom.
Berdasarkan hasil pengujian yang dilakukan, nilai rerata beban aksial maksimum kolom bertulangan bambu wulung takikan sejajar sebesar 14.250 N. Nilai rerata kapasitas lentur maksimum kolom bertulangan bambu wulung takikan sejajar sebesar 3.473.250 N.mm. Nilai rerata beban aksial maksimum kolom bertulangan baja sebesar 36.500 N. Nilai rerata kapasitas lentur maksimum kolom bertulangan baja sebesar 8.132.600 N.mm. Nilai rerata beban aksial maksimum kolom tanpa tulangan sebesar 10.750 N. Nilai rerata kapasitas lentur maksimum kolom tanpa tulangan sebesar 2.157.955 N.mm. Berdasarkan nilai kapasitas lentur maksimum, kolom beton bertulangan bambu wulung takikan sejajar dapat meningkatkan kapasitas lentur kolom sekitar 37,87 % bila dibandingkan dengan kolom beton tanpa tulangan.
Kata kunci: bambu wulung, kolom, aksial, lentur, tulangan, takikan sejajar
ABSTRACT
Residential development due to the rapid population constantly increases, triggering the prices of building materials, especially steel concrete reinforcing growing up and experiencing scarcity, making it very burdensome to lower middle class society. To overcome this, then look for a new alternative materials as a substitute for steel reinforcement is using a reinforcement of bamboo slats. This study aims to determine the flexural capacity of concrete columns reinforced wulung bamboo with parallel notches when compared to flexural capacity of concrete columns steel reinforced and flexural capacity of the columns without reinforcement.
This research need an experimental laboratory method. Specimens in the form of concrete columns with a size of 150 x 150 mm and 1,100 mm high net. Specimens made 3 types, namely wulung bamboo reinforcement of concrete columns with parallel notches, concrete column reinforcing steel, and concrete columns without reinforcement. Testing is done by testing the flexural capacity of the column using a loading frame, the eccentricity of the axial load of 200 mm from the axis of the column.
Based on the test results, the average value of the maximum axial load of the column reinforcement wulung bamboo with parallel notches is 14,250 N. The Average value of the maximum flexural capacity of the column reinforcement wulung bamboo with parallel notches is 3,473,250 N.mm. The average value of the maximum axial load of the steel reinforcement column is 36,500 N. The Average value of the maximum flexural capacity of the steel reinforcement column is 8,132,600 N.mm. The average value of the maximum axial load of unreinforced column is 10,750 N. The Average value of the maximum flexural capacity of unreinforced column is 2,157,955 N.mm. Based on the value of the maximum flexural capacity, the concrete columns reinforcement wulung bamboo with parallel notches can increase the flexural capacity of the column about 37.87% when compared with unreinforced concrete columns.
Key words: wulung bamboo, column, axial, flexural, reinforced, parallel notches