The University of Massachusetts Amherst
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Impact of construction details on OSB sheathed cold-formed steel framed shear walls

TitleImpact of construction details on OSB sheathed cold-formed steel framed shear walls
Publication TypeJournal Article
Year of Publication2014
AuthorsLiu P., Peterman KD, Schafer BW
JournalJournal of Constructional Steel Research
Start Page114
Date Published10/2014
KeywordsCold-formed steel, seismic, shear walls

The objective of this paper is to explore and characterize the impact of practical construction details on the cyclic performance of cold-formed steel framed shear walls sheathed with Oriented Strand Board. The specific construction details explored are motivated from a two-story, ledger-framed, cold-formed steel archetype building that is the focus of a larger effort to advance seismic performance-design for light steel frame construction. This larger effort in cold-formed steel (CFS) research is funded primarily by the National Science Foundation — Network for Earthquake Engineering Simulation (NSF—NEES) effort and is known as the CFS—NEES project. The archetype structure is known as the CFS—NEES building. Shear walls in real construction, such as the CFS—NEES building, have details that differ from shear walls tested and provided for strength prediction in standards such as AISI-S213. Key differences include: (a) ledger (rim track) members attached across the interior face of the studs; (b) OSB panel seams, both horizontal and vertical, may not be aligned with the chord studs or only blocked with strap; (c) interior gypsum board is in place; (d) field studs may have a different thickness or grade from the chord studs; and other differences. In this work, these highlighted differences (a–d) are specifically explored in a series of shear wall tests loaded via cyclic (CUREE) protocols to determine their hysteretic performance. The test results are compared with AISI-S213 and hysteretic material characterizations utilizing an elastic–plastic model and a model capable of exhibiting pinching in the hysteretic loops.