Analysis of reinforced concrete beam-column joint structures retrofitting

Abstract

There are many earthquake-related damages among Indonesian buildings, especially old buildings constructed based on SNI T-15-1993 standard. This research aims to study the comparison of the reinforced concrete beam-column joint structures' ability in resisting cyclic loads according to SNI T-15-1991-03 and SNI T-15-1991 codes to the ability of the joint structure that had been improved to the newer SNI 2847-2013 code. The beam-column joints structures designed by SNI T-15-1991-03 then retrofitted according to newer SNI 2847-2013 code in real-life situations refers to the damaged old building structures that fixed without the need to construct new buildings thus this will impact to budget efficiency. The joint specimens were made into three types of variation, which are the specimen with the reinforcement distribution not following the SNI T-15-1991-03 (BBK-1), retrofitting the specimen with the addition of woven wire (BBK-2), and the specimen with the reinforcement detailing according to SNI 2847-2013 (BBK-3). The beam dimension is 30 40 120 cm, and the column dimension is 30 30 200 cm. A test was carried out by applying a cyclic load in stages to a specimen through a hydraulic jack connected to a portable data logger for load recording. The specimen was equipped with strain gauges installed on steel reinforcements to detect strains that occur. The expected results in this study are to find out the most efficient and effective method used to reinforce the beam-column joints in resisting cyclic loads, both in the construction of new or old buildings.