Seismic Performance of Steel Self-Centering, Moment-Resisting Frame: Hybrid Simulations under Design Basis Earthquake
Publication: Journal of Structural Engineering
Volume 139, Issue 11
Abstract
The behavior of a self-centering moment-resisting frame (SC-MRF) is characterized by the connection gap opening and closing at beam-column interfaces under earthquake loading. A SC-MRF uses high-strength posttensioning strands to precompress the beams to the columns and to close the gaps that develop under earthquake loading, returning the frame to its initial position (i.e., the frame is self-centering). In this study, a beam web friction device is included in each beam-column connection to dissipate energy under seismic loading. Unlike a special steel moment-resisting frame with welded connections (W-SMRF), a SC-MRF can be designed to survive the design basis earthquake (DBE) without structural damage, leading to the potential for immediate occupancy performance, and to suffer only modest damage under the maximum considered earthquake, leading to collapse prevention performance. A 7-bay, 4-story SC-MRF prototype building was designed for a location in the Los Angeles area. A 0.6-scale model of two bays of the SC-MRF building was constructed in the laboratory and subjected to simulated earthquakes using the hybrid simulation method. This paper focuses on the DBE-level performance of this SC-MRF. DBE-level simulation results and performance evaluations are presented. The behavior of the SC-MRF is compared with that of a W-SMRF using nonlinear pushover analysis results.
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Acknowledgments
The research presented in this paper is based on work supported by the National Science Foundation under Award No. CMS-0420974, within the George E. Brown, Jr. Network for Earthquake Engineering Simulation Research (NEESR) program. Support for the experiments was also provided through NSF Award No. CMS-0402490 NEES Consortium Operation. Additional funding for this research was provided by the AISC and the Pennsylvania Infrastructure Technology Alliance (PITA), which is funded by a grant from the Pennsylvania Department of Community and Economic Development (PA DCED). The work was conducted at the NEES Real-Time Multi-Directional (RTMD) earthquake simulation facility located in the Advanced Technology for Large Structural Systems (ATLSS) Engineering Research Center at Lehigh University. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation or other sponsors.
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Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 11 • November 2013
Pages: 1823 - 1832
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 3, 2010
Accepted: Sep 25, 2012
Published online: Oct 15, 2013
Published in print: Nov 1, 2013
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