Four-Element Pseudodynamic Hybrid Simulation of a Steel Frame with Cast Steel Yielding Connectors under Earthquake Excitations
Publication: Journal of Structural Engineering
Volume 148, Issue 2
Abstract
Cast steel energy dissipative components are increasingly being incorporated in structural systems in recent years. Cast steel yielding connectors (YC) demonstrate a stable symmetric hysteretic response with increased postyield stiffness at large deformations due to second-order geometric effects. In the present study, the seismic performance of a four-story steel structure equipped with cast steel YCs is investigated through pseudodynamic hybrid simulations using the University of Toronto 10-Element Hybrid Simulation Platform (UT10), where the structure is subjected to three maximum considered event (MCE)-level earthquakes. Four YCs in the seismic force–resisting system are represented physically, whereas the rest of the structure is modeled numerically. These experiments are performed as part of an initiative to produce a database of high-fidelity system-level benchmark test results and to critically study and improve existing numerical models, their calibration, and the loading protocols used in their calibrations. The experimental results can be used to study these aspects in the numerical models for YCs or systems with similar hysteretic characteristics. The hybrid simulations are followed by cyclic tests on two of the YCs to evaluate the remaining low-cycle fatigue life of the YCs and to provide information on the cumulative plastic ductility capacity of YCs.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) (CRD 505341) and Ontario Centres of Excellence (OCE VIP II-27058). The specimens for the present study were donated by Cast Connex Corporation. This donation and their support throughout the project are greatly acknowledged.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 2 • February 2022
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© 2021 American Society of Civil Engineers.
History
Received: Mar 29, 2021
Accepted: Sep 8, 2021
Published online: Nov 17, 2021
Published in print: Feb 1, 2022
Discussion open until: Apr 17, 2022
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