Cold-formed steel centre-sheathed (mid-ply) shear walls

Abstract

An innovative configuration for cold-formed steel (CFS) framed and sheathed shear walls developed to address the need for a ductile lateral framing system of high shear resistance appropriate for mid-rise buildings is presented in this paper. This shear wall configuration comprises a sheathing placed at the mid-line of the framing, and hence is known as either a centre-sheathed or mid-ply wall. A laboratory based research program was conducted following an iterative design, analysis and testing process. The testing included fifteen 1218 mm × 2438 mm shear walls subjected to in-plane displacement-based monotonic and cyclic loading. The test specimens were able to reach shear resistances substantially exceeding the capacity of the CFS walls listed in the AISI S400 Standard, while attaining storey drift values superior to 6% in the best case. A preliminary equation-based nominal shear strength prediction method has been developed, reflecting the shear wall's innovative configuration and superior behaviour.

Steel Sheet Sheathed Cold-Formed Steel Framed In-line Wall Systems. I: Impact of Structural Detailing

“…Recent studies by Rizk and Rogers (2017), Santos and Rogers (2017), and Briere and Rogers (2017) have attempted to bridge the gap between the lateral capacities of steel sheet sheathed CFS-framed and hot-rolled steel shear walls through development of center-sheathed specimens, termed midply shear walls, in which a single piece of steel sheathing is sandwiched between built-up studs. These specimens attained shear resistances as high as 165 kN=m (11.3 kips/ft), more than four times the largest strength values for design available in AISI S400-15 (AISI 2015b), while also demonstrating ductile behavior at large lateral drifts (7%).…”

Seismic performance cold-Formed steel framed shear walls using in-Frame corrugated steel sheathing

“…The current research has been devoted to the development of high lateral force resisting systems suitable for mid- and high-rise structures, i.e., CFS shear walls with high bearing capacity, high ductility, and good energy dissipation capacity. The approaches primarily include: adding rigid braces to the steel frame (Wang et al, 2020; Shi et al, 2020), using double-sided sheathings (Niari et al, 2015; Mohebbi, 2015), infillings of lightweight material (Wu et al, 2018a, 2018b), installation of the buckling restraint panels (Wang et al, 2019; Tan et al, 2020), and centre-sheathed panels (Vincent et al, 2018), etc.…”

Cold-formed steel framed shear wall test database

“…Currently, 700 individual tests drawn from 29 different primary sources (Al-Kharat and Rogers, 2005, 2006; Balh and Rogers, 2010; Blais, 2006; Boudreault, 2005; Branston, 2004; Briere and Rogers, 2018; Chen, 2004; Comeau, 2008; DaBreo, 2012; DaBreo et al, 2014; Elhaji, 2005; Hikita, 2006; Kochkin and Hill, 2006; Liu et al, 2012; Lu, 2015; Morello, 2009; Morgan et al, 2002; Nguyen et al, 1996; Ong-Tone, 2009; Ong-Tone and Rogers, 2009; Rizk and Rogers, 2018; Rokas, 2006; Salenikovich and Dolan, 1999; Santos and Rogers, 2018; Serrette et al, 1997; University of California, Irvine (UCI), 2004; Velchev, 2008; Yu and Chen, 2009; Yu et al, 2007a, 2007b) are incorporated into the CFS-framed shear wall test database, published at DesignSafe-CI (Zhang et al, 2022), which is introduced herein. These collected tests include all CFS-framed shear wall tests that underpin AISI S240-15 and AISI S400-15.…”

“…Seismic overstrength and seismic fragility function research efforts for CFS-framed shear walls were also conducted based on the database (Haghpanah and Schafer 2021; Schafer et al, 2020). It is worth noting that recent testing, at McGill University, exploring CFS-framed steel sheet sheathed shear walls with higher capacity providing up to 145,939 N/m (10,000 lb/ft) in capacity (Briere and Rogers, 2018; Rizk and Rogers, 2018; Santos and Rogers, 2018) has been incorporated into the database.…”