Session Start Date

8-24-2012

Session End Date

8-25-2012

Abstract

The objective of this paper is to provide a full hysteretic characterization of OSB sheathed cold-formed steel (CFS) shear walls designed for use in the National Science Foundation funded Network for Earthquake Engineering Simulation (NEES) project: CFS-NEES (www.ce.jhu.edu/cfsnees). The shear walls were designed for a two-story ledger-framed building (i.e., the CFS-NEES building) that will undergo full-scale shake table testing at the University of Buffalo NEES site. Shear walls in real construction, such as the CFS-NEES building, have details that differ from the shear walls tested and provided for strength prediction in standards such as AISI-S213-07. Differences include: (a) ledger (rim track) members are 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 four highlighted differences (a-d) are specifically explored in a series of shear walls tests loaded via cyclic (CUREE) protocols to determine their hysteretic performance. The test results are compared with AISIS213-07 and hysteretic material characterizations utilizing an elastic-plastic model (EEEP) and a model capable of exhibiting pinching in the hysteretic loops (Pinching4). Recommendations are made with respect to modeling the shear walls.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

21st International Specialty Conference on Cold-Formed Steel Structures

Publisher

Missouri University of Science and Technology

Publication Date

8-24-2012

Document Version

Final Version

Rights

© 2012 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Characterizaiton of Cold-formed Steel Shear Wall Behavior under Cyclic Loading for the CFS-NEES Building

The objective of this paper is to provide a full hysteretic characterization of OSB sheathed cold-formed steel (CFS) shear walls designed for use in the National Science Foundation funded Network for Earthquake Engineering Simulation (NEES) project: CFS-NEES (www.ce.jhu.edu/cfsnees). The shear walls were designed for a two-story ledger-framed building (i.e., the CFS-NEES building) that will undergo full-scale shake table testing at the University of Buffalo NEES site. Shear walls in real construction, such as the CFS-NEES building, have details that differ from the shear walls tested and provided for strength prediction in standards such as AISI-S213-07. Differences include: (a) ledger (rim track) members are 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 four highlighted differences (a-d) are specifically explored in a series of shear walls tests loaded via cyclic (CUREE) protocols to determine their hysteretic performance. The test results are compared with AISIS213-07 and hysteretic material characterizations utilizing an elastic-plastic model (EEEP) and a model capable of exhibiting pinching in the hysteretic loops (Pinching4). Recommendations are made with respect to modeling the shear walls.