Behaviors and Modeling of New Self-Centering RC Wall with Improved Disc Spring Devices
Publication: Journal of Engineering Mechanics
Volume 146, Issue 9
Abstract
Cyclic loading tests were conducted on self-centering reinforced concrete (RC) walls with disc spring devices (SC-RCW-DSD), and results confirmed that these walls had sufficient energy dissipation and satisfactory self-centering capabilities to reduce damage; however, the bearing capacity of such walls was relatively low compared with conventional RC walls. This study further presented a new self-centering RC wall with improved disc spring devices (SC-RCW-IDSD) to achieve a high bearing capacity. The improved disc spring device was designed to exhibit symmetrical flag-shaped hysteretic behavior to provide stable restoring force. A numerical model of the SC-RCW-IDSD was developed and validated by the experimental results. The effects of activation force, initial stiffness, post-activation stiffness, and the ratio of friction force to preloading of the improved disc spring device on the seismic resilient performance of the SC-RCW-IDSD were then analyzed. The SC-RCW-IDSD had stable energy dissipation and excellent self-centering capabilities, and the bearing capacity was greatly improved relative to that of the SC-RCW-DSD. As the activation force of the improved disc spring device increased, the seismic performance of the SC-RCW-IDSD was greatly improved compared with that of the conventional RC wall. The improved disc spring devices dissipated more than 90% of the seismic energy and reduced damage sustained by the RC wall in the SC-RCW-IDSD.
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Data Availability Statement
All models and code generated or used during the study appear in the submitted article. All data generated or used during the study is available from the corresponding author by request, including test data used in Figs. 5–8 and simulation data used in Figs. 12–21.
Acknowledgments
The writers gratefully acknowledge the partial support of this research by the National Natural Science Foundation of China under Grant No. 51578058, and Beijing Natural Science Foundation of China under Grant No. 8172038.
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Published In
Journal of Engineering Mechanics
Volume 146 • Issue 9 • September 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Oct 26, 2019
Accepted: Apr 28, 2020
Published online: Jul 8, 2020
Published in print: Sep 1, 2020
Discussion open until: Dec 8, 2020
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