| Summary: | The Column is one of the main structures of a building. It becomes one of the structures in the portal/frame that supports beam, the entire floor load, and other loads above it. Along with the construction development, the need for transition of building function has been done a lot. To avoid a weak beam in the transition of building function, an innovation is created by reinforcing column using mortar jacketing method. In this study A5 – B5 and A6 – B6 is used for column codes. Retrofit column code A5 is the retrofit column that uses 4 pieces of bamboo longitudinal reinforcement with 10 x 10 millimeters size. Retrofit column code B5 uses 8 longitudinal bamboo reinforcement with 10 x 5 mm size. These two columns have the same transverse reinforcement length which is 7 cm. The retrofit column code A6 uses 4 pieces of bamboo longitudinal reinforcement with 10 x 10 mm size, compared to the retrofit column code B6 that uses 8 longitudinal bamboo reinforcement with 10 x 5 mm size and same transverse reinforcement that is 11 cm. Column was tested by using a compression test machine to obtain compressive force value and dial gauge to get the deflection value. The results of the study between variations of A5 and B5 was the retrofit column B5 was more effective than retrofit column A5. While for the study between variations of A6 and B6, can be concluded that B6 variations have greater effectiveness of ductility increase of 62.33% compared to the variation of A6. It concluded that the retrofit column B6 was more effective than the retrofit column A6. Therefore, in this study reinforcement configuration has an effect on the column repairs effectiveness.
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