Peak Sliding Displacements of Sliding Base Structures Subjected to Earthquake Excitation
Publication: Journal of Structural Engineering
Volume 148, Issue 3
Abstract
Sliding base (SB) systems are attractive options for protecting low-rise buildings in high-seismicity undeveloped rural areas. This study focuses on the peak sliding displacements (PSDs) of SB structures subjected to three-component earthquake excitations. Both the PSDs in the two principal directions and that with respect to the origin were investigated. The peak ground velocity (PGV) was selected as the ground-motion intensity measure (IM) because of its high correlation with the PSD and simplicity of use in design. The effect of the vertical ground-motion component on the PSDs is negligible. At a given level of normalized PGV, the probability distribution of the normalized PSD approximately follows a lognormal distribution. The relationship between the median normalized PSD and normalized PGV in each principal direction is close to that with respect to the origin, and the influence of the superstructure natural period and mass ratio is insignificant. When the normalized PGV is small, the median normalized PSDs corresponding to the nonpulse-like and near-fault pulse-like records are close to each other; when the normalized PGV exceeds a certain value (approximately ), the median normalized PSD for the pulse-like records begins to exceed that for the nonpulse-like records, with the difference increasing monotonically as the normalized PGV increases. The lognormal standard deviations of the normalized PSDs are generally between 0.4 and 0.6 except for some cases in which the normalized PGV is small. Based on the numerical results, simplified equations were developed for generating fragility curves.
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Data Availability Statement
Some or all of the data, models, or code generated or used during the study are available from the corresponding author by request: data on the numerical analyses.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (51608210 and 51878303), the Natural Science Foundation of Fujian Province (2019J06016), and the Fundamental Research Funds for the Central Universities (ZQN-YX404). The support is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 3 • March 2022
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© 2021 American Society of Civil Engineers.
History
Received: Oct 6, 2020
Accepted: Oct 21, 2021
Published online: Dec 22, 2021
Published in print: Mar 1, 2022
Discussion open until: May 22, 2022
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