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Presentation

“Seismic Analysis, Behavior, and Design of Diaphragm Collectors Using Ductile Replaceable Fuse Elements”

Architectural Engineering PhD Defense by Tunc Deniz Uludag

Date:
Time:
3:00 pm – 4:00 pm
Zoom Meeting
Contact:
Kelly Johnson, (402) 554-5935, kelly.johnson@unl.edu
Under the supervision of Dr. Jay Puckett

Abstract: This study presents an innovative inelastic collector system that transfers seismic forces from the floor diaphragms to the lateral force-resisting system (LFRS) while keeping the LFRS in the elastic region. Investigation of the inertial forces on floors showed that the interaction of the core and floor system causes each floor to trace different acceleration histories; thereby, each collector element was proportioned concerning the interaction. Thus, the proposed system might achieve a similar collapse prediction (Collapse Margin Ratio) invariant with the particularity of low-, mid-, and high-rise structures. Nonlinear dynamic analyses using 44 time-history records required by FEMA P-695 were performed for 24 archetypes to assess the proposed system’s seismic analysis, behavior, collapse assessment, and design process. Alternatively, the system makes it possible to use an extensive array of options associated with inelastic mechanisms/devices that can be used due to vertical decoupling. And importantly, the inelastic collector system carries no gravity load, so it is ideal for post-event retrofit, thereby increasing the resiliency of the entire structural system. The other contribution is to propose a linear and nonlinear design process for the proposed system.

Additional Public Info:
ZOOM ID: 955 2941 7214

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