ANALISIS RESPON DAN PERILAKU DINAMIK BANGUNAN TINGGI DENGAN SISTEM PENAHAN GEMPA DUAL SISTEM DAN BASE ISOLASI

This study examines the dynamic behavior and response of low, medium, and high-rise buildings using dual-system and base isolation methods for earthquake resistance, focusing on fundamental period, base shear, story drift, and drift ratio in reinforced concrete SRPMK structures. The analysis, conducted using response spectrum analysis (RSA) with SAP2000 software, includes three structural models: fixed base, dual system (SRPMK and shear wall), and Lead Rubber Bearing (LRB) base isolation, categorized by building height. Results show that the LRB system significantly increases the fundamental period, with increases of 4.09 seconds for low-rise and 5.01 seconds for high-rise buildings, enhancing flexibility. LRB also reduces base shear by 88% in low-rise, 80% in medium-rise, and 81% in high-rise buildings compared to fixed base systems. Additionally, LRB reduces story drift by up to 98% and drift ratio by up to 87%, outperforming the dual system. In conclusion, the LRB base isolation system significantly improves structural performance in earthquake resistance by reducing lateral deformations and increasing flexibility, especially in taller buildings.