For jiangpinghe double - curved arch dam , 3 - d elasto - plastic fem is made , in which the point safety factors of the dam - abutments system and the safety margin for coefficients of sliding resistance on 7 potential sliding blocks of the dam before and after the reinforcement of the dam are calculated under the conditions of the normal storage level and the design flood level respectively based on the results from the analysis made with fem 摘要對江坪河雙曲拱壩進行了三維彈塑性有限元分析,利用有限元應力成果分別計算了正常蓄水位、設計洪水位等3種工況下加固前后壩體壩肩系統(tǒng)的點安全系數(shù)和7個可能滑動塊體的抗滑富余系數(shù)。