Abstract
This paper investigates the constant-damage residual displacement ratios Cr (i.e., the ratio of the residual displacement in terms of the maximum inelastic displacement) of single-degree-of-freedom (SDOF) systems with different damage levels. A statistical study aimed at estimating the constant-damage Cr is conducted using the modified Park–Ang damage model when subjected to 228 ground motions recorded in California and organized for the NEHRP soil type, peak ground acceleration and ground motion duration. The effects of soil type, damage model and hysteretic behaviour are highlighted. The results indicate that constant-damage Cr increases when the damage index increases, reaching a limit at a damage index of 0.5. An empirical expression is finally proposed with two-step regression analysis to provide a reliable estimate of constant-damage Cr for SDOF structures.
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Acknowledgements
This investigation is supported by the the Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (2019D06), National Natural Science Foundation of China (U1939210; 52078470) and National Key R&D Program of China (2017YFC1500403; 2018YFC1504401). These supports are gratefully acknowledged. The authors are grateful to the anonymous reviewers for the constructive comments and suggestions.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Bali Liu and Jinjun Hu. The first draft of the manuscript was written by Bali Liu and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Liu, B., Hu, J. & Xie, L. Estimation of constant-damage residual displacements in terms of maximum inelastic displacements for SDOF structures. Bull Earthquake Eng 20, 1027–1055 (2022). https://doi.org/10.1007/s10518-021-01285-9
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DOI: https://doi.org/10.1007/s10518-021-01285-9