PARAMETRIC STUDY OF STRUCTURAL PERFORMANCE OF BRBF SINGLE SYSTEM AND SMF-BRBF DUAL SYSTEM

• Main Author: Try Menzelthe, Kosmas
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68997
• Institution: Institut Teknologi Bandung

Buckling-restrained braced frame (BRBF) and special moment frame (SMF) are structural systems that are known to have good seismic performance factors. SNI 1726-2019 issued the same seismic design parameter to both structural systems (R = 8, ?0 = 2,5 and Cd = 5). In this research, a parametric study was conducted on the structures that is designed according to SNI 1726-2019, on the effect of SMF system addition to BRBF system as an SMF-BRBF dual system. This research was conducted on PERFORM-3D software to study the performance of structure against drift, ductility, strength, and energy dissipation as the parameters. This study uses three 10-stories structural models with 45 meters height that are located at Jakarta with design seismic category D, which designed according to SNI 1726-2019. The model variation used are BRBF single system, 1 BRBF 2 SMF dual system and 1 BRBF 3 SMF dual system to learn the influence of increasing the number of spans of SMF from 2 to 3 spans at SMF-BRBF dual system. The analysis carried out are modal response spectrum analysis to design the buildings, then the performance of structures is evaluated using nonlinear static pushover analysis, nonlinear cyclic analysis, and nonlinear time history analysis (NLTHA). The study shows that the performance of single system and dual system differ significantly due to seismic loads difference that is governed by minimum and maximum period limit that is stated in SNI 1726-2019 for single system and dual system. The addition of SMF to BRBF as a SMF-BRBF dual system will increase the strength, maximum drift, ductility, and energy dissipation of structures. The requirements of dual system at SNI 1726-2019 leads to the addition of the number of spans in SMF from 2 to 3 spans will increase the maximum drift that can be experienced by the structure, but decrease the strength, ductility, and energy dissipation.