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在强震、冲击等荷载作用下混凝土重力坝易发生损伤破坏,如何有效快速地识别并定位重力坝损伤对大坝健康诊断和安全评价具有重要意义.为此提出了一种基于最小频率误差的混凝土重力坝损伤部位识别方法,该方法通过建立不同损伤部位的频率特征数据库,采用最小频率误差方法对大坝损伤进行识别和定位;同时研究了裂缝扩展深度及裂缝发展方向对该方法识别结果的影响.结果表明:提出的损伤部位识别方法能有效地识别混凝土重力坝损伤部位,且识别结果不受裂缝深度和方向的影响.“,”Damages may occur in concrete gravity dams under impact and seismic loading,and it is of significant importance that the damages can be located quickly and accurately.A novel method of damage localization in concrete gravity dams based on minimum frequency error index is developed.Frequency characteristics database of different damage regions is established and then used to locate damage by the method of minimum frequency error index.The effects of the crack depth and direction on the results of damage localization are studied.Numerical results indicate that this method can effectively identify the location of damage in concrete gravity dam;the results of damage localization are not affected by the depth and direction of cracks.