Seismic Fragility Analysis of High Earth-Rockfill Dams considering the Number of Ground Motion Records
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-12
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
This study analyzes the impact of the number of ground motions on the seismic fragility of a high earth-rockfill dam and the estimation of reasonable fragility parameters based on a sufficient number of earthquake records.
In this paper, the vertical deformation is obtained using the three-dimensional finite element program DYNE3WAC combined with the Pastor–Zienkiewicz–Chan model and Biot dynamic consolidation theory.
The relative seismic settlement rate is considered the damage index for the seismic fragility analysis of the dam.
The fragility curves of the high earth-rockfill dam are determined by the multiple stripe analysis (MSA) method.
A set of seismic waves is chosen based on the spectrum in the Chinese hydraulic structure seismic code.
With an increasing number of earthquake records, the coefficients of variation (COV) of the mean and standard deviation (STD) of the relative seismic settlement rate decrease and tend to stabilize when the number of earthquake records reaches 34.
The estimated fragility parameters θ and β are constant when the number of earthquake records exceeds 34.
The requisite number of earthquake records for an accurate fragility estimation is determined by analyzing the lower and upper confidence intervals for the estimated θ and β.
The 95% and 90% confidence interval can accurately estimate the fragility of a high earth-rockfill dam when the number of ground motion records reaches 36 and 32, respectively.
The results of the fragility analysis demonstrate that the DYNE3WAC program and MSA method can provide an effective basis for determining fragility curves.
Furthermore, the sensitivity analysis of earthquake records is essential for assessing the seismic fragility of high earth-rockfill dams.
American Psychological Association (APA)
Jin, Congcong& Chi, Shichun. 2019. Seismic Fragility Analysis of High Earth-Rockfill Dams considering the Number of Ground Motion Records. Mathematical Problems in Engineering،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1196765
Modern Language Association (MLA)
Jin, Congcong& Chi, Shichun. Seismic Fragility Analysis of High Earth-Rockfill Dams considering the Number of Ground Motion Records. Mathematical Problems in Engineering No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1196765
American Medical Association (AMA)
Jin, Congcong& Chi, Shichun. Seismic Fragility Analysis of High Earth-Rockfill Dams considering the Number of Ground Motion Records. Mathematical Problems in Engineering. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1196765
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196765