. Development of earthquake resistant building design in recent decades has produced a new invention called base isolation system. Two types of base isolation system that has been widely used are high-damping rubber bearing (HDRB) and friction pendulum system (FPS). The purpose of this study is to compare the performance of both base isolation devices on same design displacement and earthquake load and to learn the effect of both special and intermediate detailing on the buildings which have been equipped with the base isolation devices. Five hypothetical office building model, 25-story tall, with dual system structure which is located in Jakarta with medium soil condition will be introduced. Nonlinear time history analysis (NLTHA) with seven ground motion which have been scaled both to Design Basis Earthquake (DBE) and Maximum Credible Earthquake Risk Category (MCER) target spectra will be used. The measured parameters included roof drift, base shear, inter-story drift, plastic hinges damage, effective damping ratio, and energy dissipation capacity for both devices. Based on these parameters, it has been proved that FPS works more effectively when compared to HDRB in reducing seismic damage. Besides, effect of confinement is no longer significant for buildings which have been equipped with base isolation devices.
展开▼
