ANALISIS METODE DAN BIAYA PERKUATAN BALOK KANTILEVER PADA PROYEK WONDERLAND ULUWATU

Abstract

A strong and durable structure is the expectation for every building. However, in the implementation of concrete manufacturing projects, there are still many issues due to the quality of concrete not meeting the plan specifications, resulting in an inability to withstand the working load. For example, in the building construction project at Wonderland Uluwatu, the planned concrete quality for the cantilever beam was K300. However, when the hammer test was conducted at 28 days of curing, the expected quality was not achieved. So, a cantilever beam is necessary to repair and strengthen the concrete structure of the building to ensure its safety. This research compares the reinforcement methods for cantilever beams in terms of cost. Two cantilever beam reinforcement methods will be implemented: first, steel jacketing reinforcement using 8 mm and 10 mm thick steel plates; second, IWF steel reinforcement with dimensions of 500 mm x 200 mm x 10 mm x 16 mm. These reinforcement methods will be evaluated through deflection analysis and deviation analysis. The results of this study indicate that the cost of the steel jacketing reinforcement method with thicknesses of 8 mm and 10 mm amounts to Rp. 345,086,768.00. In contrast, repairing or reinforcing the cantilever beam using the IWF 500.200.10.16 steel method, assuming that the IWF is available in Bali, costs Rp. 272,515,956.00. Based on the cost calculations for each reinforcement method, it can be concluded that the IWF steel method is more economical, with a difference of Rp. 72,570,812.00.