Abstract
Traditional civil structures with yielding systems can be subjected to damage and permanent deformation through major earthquakes, which may induce substantial post-earthquake repair costs and is a critical issue for performance-based seismic design. A novel capped column with an elastic buckling mode jump (BMJ) mechanism is introduced as an economical passive alternative for obtaining flag-shaped hysteretic damping, self-centering and reusability in seismic design. A simple analytical model for the BMJ mechanism is derived and verified with finite element model simulation results for a variety of capped column geometric configurations. Using the validated analytical model, a parametric study is conducted on the geometric properties to provide design guidance. A practical passive self-centering hysteretic damping brace design is also provided in this paper, based on a combination of multiple BMJ mechanisms. The seismic performance of a 3-story frame building under a suite of 20 earthquake ground motions with BMJ brace is compared with a buckling-restrained brace (BRB) frame system as well as a conventional brace (CB) frame system. The results demonstrate the potential of a brace system utilizing BMJ mechanisms to outperform BRB and CB by achieving acceptable inter-story drift response without sustaining residual drift.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
