KAJIAN KINERJA STRUKTURAL ELEMEN BRESING SRBK DENGAN TIPE PENAMPANG TUNGGAL DAN GANDA TERHADAP BEBAN SIKLIK

Abstract

The seismic-resistant structure is required for the earthquake-hazard area. One of the seismic-resistant systems is the Concentrically Braced Frame (CBF), which was established to diminish seismic damage. At the time of implementation, the CBF reduces the horizontal deformations of the building so that failure as well as heavy damage to the building can be avoided. In CBF, the brace is the energy dissipator, whose performance needs to be enhanced. This study discussed the structural performance of several modified bracings to obtain a better configuration due to the seismic action, i.e., single bracing (BR1), double bracing with batten plates (BR2), and double bracing with lacings (BR3). All specimens were 600 mm in length. This study was established on the principle of replaceable bracing, which means that the bracing can be removed and replaced by new bracing. Accordingly, the connection between the gusset plate and bracing was constructed to be a bolted connection. Experimental work was carried out by employing the cyclic load and considering yield displacement control (dy). The magnitude of the displacement control was gradually increased at a rate of 1 dy. During the test, the observations were emphasized in the load-displacement parameter, from which the specimen's performance can be described and revealed. The results showed that adding the sectional area in BR2 and BR3 effectively escalated the performance parameters, i.e., strength, stiffness, and dissipation energy. Furthermore, the lacing installation in BR3 increased the efficiency of dissipation energy and contributed to a higher cumulative dissipation energy in BR3 than in BR2.