Iffah Ariqoh Fakrunnisa
Universitas Pertamina
Gati Annisa Hayu
Universitas Pertamina
Keywords: base isolation, base shear, displacement, high damping rubber bearing, lead rubber bearing
ABSTRACT
Base isolation system is an innovation in the technological development of earthquake-resistant building design. Two types of base isolation systems that have been widely used for building are High Damping Rubber Bearing (HDRB) and Lead Rubber Bearing (LRB). These base isolations have their own characteristics. The aim of this research is to compare the performances of HDRB and LRB under the same earthquake load in an 8 th -storey reinforced concrete building. The building used here is a school building with a special moment frame located in Yogyakarta with medium soil conditions. The measured parameters are displacement, base shear, and inter-story drift of the structure. The displacement of the structure with LRB increased by 43,97% while the HDRB system increased by 55,465% in the y-axis. The results show that structure with base isolation has a smaller axial force and shear force. The difference between the two in the LRB system is 1,82% and 96,18%, while HDRB is 2,36% and 97,58% respectively. Based on these parameters, the structure with the HDRB system works more effectively when compared with LRB.
