Experimental and Analytical Testing of a Rotational Friction Connection for Metal Buildings with Hard Walls
Publication: Journal of Structural Engineering
Volume 146, Issue 10
Abstract
Metal building systems clad in masonry or precast concrete panels (hard walls) have been shown through analytical studies, shake table tests, and postearthquake reconnaissance to be susceptible to collapse under significant earthquakes due to a stiffness incompatibility between the heavy, stiff wall cladding and the light, flexible steel frame. This paper details the development of a new, simple rotational friction connection (RFC) that takes advantage of this stiffness incompatibility and passively dissipates seismic energy. Theoretical equations of the rotational friction connection were developed to predict the structural behavior. The connection was experimentally tested using a monotonic pushover test, unidirectional cyclic testing, a biaxial test, and an out-of-plane test. The test results showed that the connection exhibited a stable nondegrading hysteresis behavior. Connection damage was minimal and would not require component replacement or maintenance adjustments following a seismic event. Three-dimensional solid finite-element models of the connection were successfully developed to capture the force–displacement behavior and were utilized in a parametric study to evaluate a wider range of connection parameters.
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Acknowledgments
This research was based on work supported by the National Science Foundation under Grant No. 1335181. Any opinions, findings, and conclusions or recommendations are those of the authors and do not necessarily reflect the views of the National Science Foundation. Financial support is also gratefully acknowledged from the Metal Building Manufacturer’s Association. The steel components used in testing were generously donated by American Buildings Company, a Nucor Company in Eufaula, Alabama.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 10 • October 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 21, 2019
Accepted: Apr 1, 2020
Published online: Jul 27, 2020
Published in print: Oct 1, 2020
Discussion open until: Dec 27, 2020
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