Evaluasi dampak perbaikan pada kolom eksentris dengan metode jacketing (Studi Kasus: Gedung Perkuliahan X di Yogyakarta)

Abstract

Construction has various complex processes that need to be executed properly in order to achieve safe, functional and durable results. However, when carrying out construction practices, errors can occur during implementation. The problem found in the Lecture Building project was that there were columns that were eccentric during the implementation of the pedestal column and 1st floor by 20 cm. One of the most appropriate alternative solutions to reduce column shifts that can be done by using the concrete jacketing method on the pedestal columns. Concrete Jacketing or column thickening is carried out on the right side of the column to a thickness of 20 cm so that the dimensions of pedestal column which were previously 50x50 become 50x70 with the addition of stirrup reinforcement which is anchored to the existing column and longitudinal reinforcement which is anchored to the footplate foundation. The research results show that the concrete jacketing repair method can overcome the problem of column eccentricity which exceeds the ACI 117 tolerance. Behavior of building structure after the columns have been strengthened using the concrete jacketing method produces relatively smaller deviation values between floors when compared to column thath have not been reinforced. The internal force on column increased after the column was strengthened using the jacketing method. The internal force in the beam which previously increased became smaller after strengthening the eccentric column. This is because the stiffness of the building structure with column reinforcement is greater than the stiffness of the previous structure.