Seismic performance of stiffness-based designed buckling-restrained braced frame and special moment-resisting frame dual systems |
| |
| Authors: | Alireza Mehdipanah Seyyed Rasoul Mirghaderi Seyyed Ali Razavi Tabatabaei |
| |
| Affiliation: | 1. Department of Infrastructure Engineering, The University of Melbourne, Parkville, Victoria 3010, Melbourne, Australia;2. School of Civil Engineering, College of Engineering, University of Tehran, Enghelab Ave., P.O. Box: 11365-4563, Tehran, Iran;3. School of Civil Engineering, College of Engineering, University of Tehran, Enghelab Ave., P.O. Box: 11365-4563, Tehran, Iran |
| |
| Abstract: | Conventional procedure for designing dual systems, proposed in seismic regulations, encompasses some limitations such as not putting a required minimum stiffness value for the secondary system. This research investigates the stiffness limit value required for the secondary system for designing buckling-restrained braced frame (BRBF) and special moment-resisting frame (SMRF) dual systems. Non-linear static and time history analyses were carried out on the sample dual structures with different heights and different relative stiffness ratios of the primary system to the secondary system. A stiffness-based designing approach is employed to ensure that the designed system comprises the predefined relative stiffness ratios. It is demonstrated that the suitable stiffness combination ratio is gained when the BRBF and SMRF subsystems have 65% and 35% of the total stiffness, respectively. Implementation of the suitable relative stiffness ratio in the dual systems designed according to the presented approach, leads to a uniform plasticity profile in the height of structures. |
| |
| Keywords: | buckling-restrained braced frames special moment-resisting frames dual systems stiffness-based design approach seismic performance |
|
|
