Cast Modular Panel Zone Node for Steel Special Moment Frames. II: Experimental Verification and System Evaluation
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Volume 133, Issue 10
Abstract
A companion paper has described the analytical development of a panel zone dissipator modular node (PZ-MN) prototype for use in seismic-resistant steel moment frames. The PZ-MN dissipates energy through stable yielding of its panel zone, an objective accomplished by mitigating the effects of panel zone distortion on the surrounding members. The PZ-MN is configured directly for this purpose through a casting process. This paper presents experimental verification of the PZ-MN prototype. This process relied heavily on interaction with industry partners to create a castable and constructible shape. The PZ-MN prototype was cast at full scale, fabricated and subjected to FEMA-350 qualification testing with and without gravity load. The PZ-MN prototype exhibited remarkable performance, greatly exceeding qualifying drift angles and possessing exceptional hysteretic characteristics. Using models based on these characteristics, frame performance is evaluated. Design guidelines are given on the basis of the analytical and experimental results.
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Acknowledgments
This research was supported by NSF CAREER Award Grant No. NSFCMS-01-96120. Supplemental funds were provided by the American Institute of Steel Construction (AISC) and the Steel Founder’s Society of America (SFSA). Industry Partners Varicast, Inc. and Able Steel created the prototype specimens. The reaction frame was provided through a donation by ConXtech, Inc.; the computer laboratory through a grant from Intel, Inc.; and the finite element software was donated by industry partner Swanson, Inc. (ANSYS). The writers are grateful for this support. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writers and do not necessarily reflect the views of the National Science Foundation.
References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 10 • October 2007
Pages: 1404 - 1414
Copyright
© 2007 ASCE.
History
Received: Sep 8, 2003
Accepted: Oct 9, 2006
Published online: Oct 1, 2007
Published in print: Oct 2007
Notes
Note. Associate Editor: Sherif El-Tawil
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