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Probability Risk Assessment and Management of Embankment Seismic Damages Based on CPSHA-PSDA

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Abstract

In destructive earthquakes, embankment seismic damages were widely distributed, and researches on embankment seismic hazard, fragility, and probability risk assessment have important significance to improve highway seismic performance and for regional disaster prevention and mitigation capacities. Embankment seismic damages were divided into five grades, and the maximum lateral permanent displacement rate on the top surface εmax was selected as the embankment seismic damage parameter. Taking the Xi’an–Baoji expressway K1125 + 470 embankment as an example, we carried out a seismic hazard assessment based on CPSHA, a fragility assessment based on IDA and PSDA, and a probability risk assessment based on a hazard curve. On the basis of risk acceptability, a risk management method was put forward, which was suitable for the seismic design of new embankments and seismic strengthening of existing embankments, and verified the positive effect of a retaining wall on the embankment seismic performance. The results show that the seismic hazard assessment results of the Xi’an–Baoji expressway were higher than those of the fourth-generation seismic zoning map; when the PGA reached 0.8 g, the exceedance probability of severe damage was as high as 99.995%; the probability risk of severe damage in the next 50 years was 36.46%. However, the probability risk of severe damage of the embankment with the retaining wall was found to be 21.17%, indicating that a retaining wall can significantly reduce the embankment seismic damage risk. The embankment seismic damage risk was divided into high, medium, and low levels: medium risk and low risk were acceptable, and high risk was unacceptable.

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Acknowledgements

This study is supported by the National Natural Science Foundation of China (Grant No. 51608313), Natural Science Foundation of Shandong Province (Grant No. 2015ZRB019JS), and Doctor’s Research Launching Program of Shandong University of Technology (Grant No. 415046).

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Correspondence to Chao Yin.

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Yin, C., Li, Y. & Liu, Ff. Probability Risk Assessment and Management of Embankment Seismic Damages Based on CPSHA-PSDA. Iran J Sci Technol Trans Sci 43, 1563–1574 (2019). https://doi.org/10.1007/s40995-018-0630-9

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  • DOI: https://doi.org/10.1007/s40995-018-0630-9

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