PERFORMANCE EVALUATION OF BUCKLING RESTRAINED BRACED FRAME

• Main Author: YUNITA SARI, DEA
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/61474
• Institution: Institut Teknologi Bandung

Buckling restrained braced frame is an earthquake-resistant structural system in which the brace can not buckle under axial compression load. The design for BRBF structure as a seismic force-resisting system based on SNI 1726-2019 is conducted with the seismic parameters of R = 8, Cd = 5 and ?o = 2,5, and there is a limit on the height of the structure for seismic design category D, that is 48 meters. To understand the effect of height limitation on the code, structural designs were conducted for a 5-story building with a height of 17,5 m, a 10-story building with a height of 35 m, and a 20-story building with a height of 70 m. 3D structural models were developed with BRBF as a single system for lateral resisting system. The initial design of the structures were carried out sing modal response spectrum analysis (MRSA). The result of the design was then evaluated using linear response history analysis (LRHA). The performance level was obtained from pushover analysis on the BRBF structures that were designed using MRSA. From this study, structural design for BRBF with MRSA satisfy all the requirement of SNI 1726-2019 for all three models. The design of the BRBF structure from MRSA were evaluated with LRHA, and the result obtained show that the design does not meet the requirement in terms of the inter-story drift for building that exceeds the height limit based on SNI 1726-2019. The performance level of all structures using pushover analysis is Immediate Occupancy (IO), and none of the elements reach the Collapse Prevention (CP) level. Thus, the BRBF designed with MRSA has good performance and can be used even though the height limit has been exceeded. To improve the performance of the structure, it is recommended for BRBF with height exceeding the limit of SNI 1726-2019 to be designed with LRHA, so that the inter-story drift obtained meets the requirements.