COMPARISON STUDY OF CHEVRON TYPE BRACED CONFIGURATION ON CONCENTRICALLY BRACED FRAME SYSTEM AND BUCKLING RESTRAINED BRACED FRAME SYSTEM

• Main Author: Octarena Nugroho, Wivia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/36454
• Institution: Institut Teknologi Bandung

Concentrically Braced Frame (CBF) System has several advantages over other structures. CBF has high elastic stiffness and damage control in structural systems. Unlike Moment Resisting Frame (MRF) System and Eccentrically Braced Frame (EBF) System that damages are distributed through the framework element that difficult to be repaired, damages on CBF are concentrated in braces that relatively easy to be inspected and to be repaired. However, CBF has several disadvantages like unstable hysteretic behavior, limited ductility and energy dissipation. That points above encourage the development of new CBF that has stable hysteretic behavior, significant ductility and energy dissipation, it is called Buckling Restrained Braced Frame (BRBF). Because of that favorable properties, BRBF be expected to improve the performance of CBF structures. The purpose of this Essay is to know how big the differences are generated by the two types of structures in the both structural response, linear and nonlinear. In addition, CBF and BRBF with Chevron braced configuration in this case study will also be compared to CBF and BRBF with V braced configuration which is belong to Annesa Fadhila Sari and CBF and BRBF with X-2 Story braced configuration which is belong to Ahmad Afifi. The methods are preliminary design, structure element design, Nonlinier Static Pushover Analysis and Nonlinier Time History Analysis. Preliminary design is done by estimating the cross-section profiles and checking brace capacity. If the brace capacity is met the requirement, the next step is designing the elements endured by seismic loading with capacity design. The results show that the deviation between floors, interstory drift, period and structural parameters (R, ?, ?o) for CBF is smaller than BRBF. With the same cross-section properties, when the structure is elastic, there is no significant effect of the use of different braced configuration on the floor drift, interstory drift and base shear forcé. But when the structure becomes inelastic, each configuration has different ductility and stiffness. Effect of the changes form CBF to BRBF very effective to be applied to Chevron braced configuration.