Capacity Evaluation of Typical Track-to-Concrete Power-Actuated Fastener Connections in Nonstructural Walls
Publication: Journal of Structural Engineering
Volume 142, Issue 6
Abstract
Damage to track-to-concrete connections has been widely reported in experimental studies on the seismic performance of nonstructural partition walls. These connections are commonly comprised of light-gauge cold-formed steel tracks attached to the concrete base material with power-actuated fasteners (PAFs). The failure of PAF connections resulted in a loss of strength and stiffness of the partition walls and led to subsequent damage mechanisms. A series of component-level experiments was conducted at the University of Nevada, Reno, to characterize the cyclic response and damage mechanisms of track-to-concrete PAF connections subjected to either tension or shear force. The observed damage mechanisms and force-displacement responses are presented and compared for two track thicknesses. Also, the accuracy of available design provisions for predicting the ultimate connection capacity was investigated. The data were then used to develop the capacity fragility curves in terms of connection displacement. Additionally, a series of nonlinear numerical hinge models was proposed and calibrated using component experimental data to represent the hysteretic behavior of track-to-concrete connections.
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Acknowledgments
The present material is based on work supported by the National Science Foundation under Grant 0721399. This Grand Challenge (GC) project to study the seismic response of nonstructural systems is under the direction of M. Maragakis from the University of Nevada, Reno, and co-principal investigators: T. Hutchinson (UCSD), A. Filiatrault (UB), S. French (G. Tech), and B. Reitherman (CUREE). Any opinions, findings, conclusions, or recommendations expressed in this document are those of the investigators and do not necessarily reflect the views of the sponsors. The input provided by the Practice Committee of the NEES Nonstructural Project, composed of W. Holmes (Chair), D. Allen, D. Alvarez, and R. Fleming, and by the Advisory Board, composed of R. Bachman (Chair), S. Eder, R. Kirchner, E. Miranda, W. Petak, S. Rose, and C. Tokas, has been crucial for the completion of this research. Assistance from M. Lattin of the University of Nevada, Reno, material lab during the assembly and testing and support from Johnnie Stolz of Omboli Interior Inc. are appreciated.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 6 • June 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Feb 10, 2015
Accepted: Nov 3, 2015
Published online: Jan 19, 2016
Published in print: Jun 1, 2016
Discussion open until: Jun 19, 2016
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