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Title |
Improvement of Seismic Performance Evaluation Method for Concrete Dam Pier by Applying Maximum Credible Earthquake(MCE)
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Authors |
오정근(Jeong-Keun Oh) ; 정영석(Yeong-Seok Jeong) ; 권민호(Min-Ho Kwon) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.6.1 |
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Keywords |
동적소성해석; 평균응력-평균변형률 기법; 최소철근비; 인장강화효과 Dynamic plastic analysis; Average stress-Average strain method; Minimum rebar ratio; Tensile strengthening effect |
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Abstract |
This paper assesses the suitability of existing standards for plastic material models and performance level evaluation methods in seismic performance evaluations of concrete dam piers during Maximum Credible Earthquakes (MCE). Dynamic plastic analysis was conducted to examine the applicability of the plastic material model under various conditions. As a result reveal that when the minimum reinforcement ratio is not met, the average stress-average strain method recommended in current dam seismic performance evaluation guidelines tends to underestimate pier responses compared to the predicted outcomes of dynamic elastic analysis. Consequently, the paper proposes an improvement plan that treats dam piers with an insufficient minimum reinforcement ratio as unreinforced and integrates fracture energy into concrete tensile behavior characteristics for performance level evaluation. Implementing these improvements can lead to more conservative evaluation outcomes compared to current seismic performance evaluation methods.
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