Seismic Behavior of Frame-Wall-Rocking Foundation Systems. II: Dynamic Test Phase
Publication: Journal of Structural Engineering
Volume 141, Issue 12
Abstract
This paper presents the earthquake response of three low-rise frame-wall-foundation centrifuge building models, including a structural hinging-dominated, foundation rocking-dominated, and balanced design model. The models were designed such that the capacities of the dominant inelastic elements varied; however, each was subjected to a similar sequence of earthquake shaking in a 30-g centrifuge environment to facilitate comparison. Experimental results reveal that the traditional frame-wall building with a strong foundation (i.e., a hinging-dominated system) has the least potential to recover from displacements induced during earthquake shaking. As a result, this system suffered the most significant residual deformation. In contrast, systems with rocking foundations sustained a smaller peak roof acceleration, residual drift, and peak base shear despite the relatively larger peak transient drift demand. Consistent with slow cyclic test results, dissipated hysteretic energy was reasonably distributed amongst superstructure and substructure inelastic components in the balanced model during moderate and high intensity shaking.
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Acknowledgments
The research program reported herein is financially supported by the National Science Foundation through the NEES research program under the award CMMI-0936503. Opinions, findings, and conclusions expressed are those of the authors, and do not necessarily reflect the view of the sponsoring agency. The authors appreciate the suggestions and feedback provided by Professors Mark Aschheim and Sashi Kunnath. This test program would not have been possible without the assistance of staff members at the UC Davis NEES facility. Student assistants, including Dr. Mark Stringer, Kaijie Huang, and Keisuke Nagaura, also contributed their efforts during this test program. The third author (Andreas G. Gavras) was partially supported by an Alexander Onassis Foundation scholarship. The above support is gratefully acknowledged.
References
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Information
Published In
Journal of Structural Engineering
Volume 141 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: May 6, 2014
Accepted: Feb 24, 2015
Published online: Apr 10, 2015
Discussion open until: Sep 10, 2015
Published in print: Dec 1, 2015
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