Quantifying the Ductility-Related Force Modification Factor for 10-Story Timber–RC Hybrid Building Using FEMA P695 Procedure and Considering the 2015 NBC Seismic Hazard
Publication: Journal of Structural Engineering
Volume 147, Issue 5
Abstract
In this work, a 10-story uncoupled (10S-U) hybrid seismic force resisting system, consisting of cross-laminated timber (CLT) walls and reinforced concrete (RC) beams, is considered. Required design ductility factor , in congruence with the National Building Code of Canada, was developed using FEMA P695 collapse risk procedure. Two trial factors, and , were first used to design the hybrid building for seismicity of Vancouver, BC, and 3D numerical models were developed in Open System for Earthquake Engineering Simulation (OpenSees) finite element framework. The energy dissipation of the structural system was enhanced using buckling restraining brace hold-downs and energy dissipator connection between the panels. The rocking response mechanism governed and, as a result, the cyclic pushover results show recentering capability. A suitable set of 30 ground motion records that reflect the seismic hazard of Vancouver, British Columbia, was selected in congruence with the 2015 National Building Code of Canada (NBC). Using incremental dynamic analysis, the collapse risk and collapse margin ratios were obtained to check the suitability of the two proposed factors. The factor was shown to be acceptable for the 10S-U structural system.
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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: OpenSees building model and ground motion records.
Acknowledgments
Funding for this research was provided by the British Columbia Forestry Innovation Investment’s (FII) Wood First Program and the Natural Science Engineering Research Council of Canada Discovery Grant (RGPIN-2019-05013).
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Published In
Journal of Structural Engineering
Volume 147 • Issue 5 • May 2021
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© 2021 American Society of Civil Engineers.
History
Received: Apr 27, 2020
Accepted: Jan 12, 2021
Published online: Mar 8, 2021
Published in print: May 1, 2021
Discussion open until: Aug 8, 2021
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