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- W2896518662 abstract "In existing study of seismic vulnerability of concrete dams, the classification of seismic damage degrees was based on single index and the incremental step length in IDA analysis failed to consider the structural responses. In this study, a seismic vulnerability analysis method of concrete dams based on improved IDA method is proposed. To begin with, the comprehensive damage index of the dam is calculated using the efficiency coefficient method, considering the indexes of crest displacement, stress and damage area, and the variable weight model is adopted to consider the influence of index value on the index weight. In addition, the IDA method is improved by modulating incremental step length based on obtained comprehensive damage indexes and damage degree classification, so that the structural response process of a dam from elastic state to complete failure can be calculated and analyzed more comprehensively. Finally, taking one block section of a concrete dam as an example, the finite element model is established, and the seismic fragility curve is plotted utilizing the improved IDA method. The results prove that this method can be used to analyze the failure probability of concrete dams under different earthquake intensity, and can provide theoretical basis for the seismic safety design of concrete dams." @default.
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- W2896518662 date "2018-10-01" @default.
- W2896518662 modified "2023-10-16" @default.
- W2896518662 title "Study on seismic vulnerability of concrete dams based on improved IDA" @default.
- W2896518662 doi "https://doi.org/10.1360/n092018-00280" @default.
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