Effect of Displacement and Hysteretic Energy on Earthquake Damage in Reinforced Concrete Structures
Publication: Journal of Structural Engineering
Volume 147, Issue 7
Abstract
A seismic damage index is validated using data from shaking table tests on full-scale and scaled reinforced concrete (RC) specimens. The experimental specimens include wall and frame lateral building systems and ductile and nonductile detailing. The index accounts for the hysteretic energy dissipated by a single degree of freedom oscillator and the building roof displacement. The use of hysteretic energy allows the index to incorporate the number and amplitude of strong-motion cycles, which are important for large-magnitude, long-duration earthquakes typical of subduction zones. Damage is found to vary linearly with normalized hysteretic energy in a way that favors wall systems over frame systems. For the same normalized displacement demand, the index predicts lower damage in wall systems. Potential applications of the damage index include: (1) measuring damage accumulation over multiple earthquakes; (2) supporting the development of risk-targeted spectra that consider the duration and amplitude of strong-motion; and (3) generating regional damage estimates after an earthquake.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request (INSPECT input and output files and MATLAB version R2019a code used to perform calculations).
Acknowledgments
The authors gratefully acknowledge Marios Panagiotou for providing the data for the LI and U7 tests and Mete Sozen, now deceased, for providing information on the groundbreaking test series on specimens CA and CB and insight on early parts of this study. T. Rodriguez-Nikl thanks California State University, Los Angeles, for the sabbatical leave during which this work was performed, and the Instituto de Ingeniería, Universidad Nacional Autónoma de México (UNAM), for hosting him. The authors also thank the anonymous reviewers for the significant effort they dedicated to the manuscript. Their detailed and insightful questions and comments improved the manuscript significantly.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 7 • July 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Feb 4, 2020
Accepted: Feb 10, 2021
Published online: Apr 19, 2021
Published in print: Jul 1, 2021
Discussion open until: Sep 19, 2021
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