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Keywords = effective peak acceleration (EPA)

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24 pages, 7854 KiB  
Article
Prediction Equation for Horizontal Ground Motion Peak Values in the Loess Plateau Region
by Wei Wan, Jingshan Bo and Da Peng
Appl. Sci. 2025, 15(3), 1098; https://doi.org/10.3390/app15031098 - 22 Jan 2025
Viewed by 886
Abstract
This study collects all strong motion records from 134 seismic events in the Loess Plateau region of China between 2020 and 2023. The corresponding ground motion attenuation dataset is constructed through data processing and screening, including 1149 soil horizontal strong ground motion records. [...] Read more.
This study collects all strong motion records from 134 seismic events in the Loess Plateau region of China between 2020 and 2023. The corresponding ground motion attenuation dataset is constructed through data processing and screening, including 1149 soil horizontal strong ground motion records. Based on this dataset, two ground motion attenuation models are developed. Specifically, through magnitude grouping and weighted processing, two-step fitting methods are used to establish prediction equations for the peak ground acceleration (PGA), effective peak acceleration (EPA), and peak ground velocity (PGV) at the horizontal soil layers. These equations can estimate ground motion parameters with magnitudes ranging from MS 3.0 to MS 6.5 and epicentral distances between 0 and 100 km. Furthermore, attenuation curves are plotted based on the prediction equations. A comparison between the actual observed values and the predicted curves and an evaluation of the fitting residuals assess our models’ fitting performance. The attenuation characteristics of horizontal ground motion parameters in the Loess Plateau region are systematically summarized. Full article
(This article belongs to the Section Earth Sciences)
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17 pages, 3360 KiB  
Article
Sensitivity of EPA of Ground Motion to Soil Slope Dynamic Response
by Jiangwei Zhang, Yan Shen, Tao Lu, Ying Yuan and Chengda Zhang
Sustainability 2022, 14(24), 16985; https://doi.org/10.3390/su142416985 - 18 Dec 2022
Cited by 1 | Viewed by 1671
Abstract
To study the influence law of effective peak acceleration (EPA) on the seismic response of soil slope, the finite element method was used to simulate the slope response under earthquake action with 100 actual seismic records were selected, the influence law of the [...] Read more.
To study the influence law of effective peak acceleration (EPA) on the seismic response of soil slope, the finite element method was used to simulate the slope response under earthquake action with 100 actual seismic records were selected, the influence law of the EPA under four different definitions commonly used in domestic and foreign codes on the soil slope seismic response was discussed, and which was compared with the influence law of the peak acceleration (PGA). The results showed that the deformation and the maximum principal stress of soil slope both increased with the EPA and PGA, which had an obvious linear relationship, but the correlation degree were different with the parameters of PGA and EPA by the different definitions. EPA1 by the first definition has the highest correlation with the soil slope seismic response, followed by PGA, which was close to EPA1. Other parameters in order of correlation coefficient were EPA2, EPA3 and EPA4. In this example, EPA1 and PGA could better describe the response degree of soil slope in earthquake. The results are expected to provide a basis for the selection of seismic parameters in soil slope seismic stability evaluation. Full article
(This article belongs to the Special Issue Slope Stability Monitoring and Evaluation)
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