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Geomechanics and Engineering Volume 18, Number 6, August30 2019 , pages 661-668 DOI: https://doi.org/10.12989/gae.2019.18.6.661 |
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A dynamic reliability approach to seismic vulnerability analysis of earth dams |
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Hongqiang Hu and Yu Huang
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| Abstract | ||
| Seismic vulnerability assessment is a useful tool for rational safety analysis and planning of large and complex structural systems; it can deal with the effects of uncertainties on the performance of significant structural systems. In this study, an efficient dynamic reliability approach, probability density evolution methodology (PDEM), is proposed for seismic vulnerability analysis of earth dams. The PDEM provides the failure probability of different limit states for various levels of ground motion intensity as well as the mean value, standard deviation and probability density function of the performance metric of the earth dam. Combining the seismic reliability with three different performance levels related to the displacement of the earth dam, the seismic fragility curves are constructed without them being limited to a specific functional form. Furthermore, considering the seismic fragility analysis is a significant procedure in the seismic probabilistic risk assessment of structures, the seismic vulnerability results obtained by the dynamic reliability approach are combined with the results of probabilistic seismic hazard and seismic loss analysis to present and address the PDEM-based seismic probabilistic risk assessment framework by a simulated case study of an earth dam. | ||
| Key Words | ||
| earth dams; randomness of ground motion; seismic vulnerability; dynamic reliability; seismic risk | ||
| Address | ||
| Hongqiang Hu: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China Yu Huang: 1.)Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China 2.) Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China | ||