Steel Sheet Sheathed Cold-Formed Steel Framed In-line Wall Systems. II: Impact of Nonstructural Detailing
Publication: Journal of Structural Engineering
Volume 148, Issue 12
Abstract
Although cold-formed steel (CFS) framing systems have the potential to support the need for resilient housing, the use of CFS has been restricted due to gaps in understanding its structural behavior and by the limited guidelines provided in design standards. In particular, the contribution from nondesignated lateral systems and portions of the building system not specifically designated by the design engineers has not been substantially investigated through experiments. To address these shortcomings, a two-phased experimental effort was undertaken to assess the impact of gravity walls, finish application, window openings, and their relationship with the designated lateral force–resisting system. The wall-line assemblies tested, which have shear walls placed in-line with gravity walls, adopted chord stud packs with a tie-rod assembly and were either unfinished or finished, and laid out in a symmetrical or unsymmetrical fashion. In addition, both Type I and Type II shear wall and anchorage detailing were investigated. In this paper, the impact of test variables governing the nonstructural detailing of CFS-framed walls has been quantified, and a companion paper presents findings regarding the impact of structural detailing.
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Data Availability Statement
The specimens tested under the CFS-NHERI experimental program were monitored with many analog sensors in addition to digital still cameras, several video cameras, and Global Positioning System (GPS) and unmanned aerial vehicles (UAVs) monitoring systems. High-quality data generated during the study are publicly available within the DesignSafe-CI repository (Singh et al. 2021a, 2022a).
Acknowledgments
The research presented herein is funded through the National Science Foundation (NSF) Grant Nos. CMMI 1663569 and CMMI 1663348, project entitled Collaborative Research: Seismic Resiliency of Repetitively Framed Mid-Rise Cold-Formed Steel Buildings. Ongoing research is a result of collaboration between three academic institutions: University of California, San Diego, Johns Hopkins University and University of Massachusetts, Amherst, two institutional granting agencies: American Iron and Steel Institute and Steel Framing Industry Association, and 10 industry partners. Industry sponsors include ClarkDietrich Building Systems, California Expanded Metal Products Co. (CEMCO), SWS Panel, SureBoard, United States Gypsum Corporation (USG), MiTek, Nevell Group, Atlas Tube, the Steel Network (TSN), and NBM Technologies; who each provided financial, technical, construction, and materials support. Specific individuals that dedicated significant time on behalf of this effort included Greg Ralph (ClarkDietrich), Fernando Sesma (CEMCO), Diego Rivera (SWS Panels), Tyler Elliot (SureBoard), Shahab Torabian (NBM Technologies), Esmaeel Rahmani and Jesse Karnes (MiTek), and Mike Korthals and Mark Wilson (Nevell Group). Regarding support for the test programs, the efforts of NHERI@University of California, San Diego, and Powell Labs staff, namely Noah Aldrich, Robert Beckley, Jeremy Fitcher, Abdullah Hamid, Dr. Christopher Latham, Darren McKay, Andrew Sander, Michael Sanders, and Alex Sherman, graduate students Filippo Sirotti and Maryam Soltani (University of Bologna, Italy), and several undergraduate students are greatly appreciated. Findings, opinions, and conclusions are those of the authors and do not necessarily reflect those of the sponsoring organizations.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 12 • December 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Sep 2, 2021
Accepted: Apr 18, 2022
Published online: Sep 22, 2022
Published in print: Dec 1, 2022
Discussion open until: Feb 22, 2023
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