Based on the ridge function derived from Matsuoka-Nakai,Lade-Duncan and Ottosen strength failure criteria,a modified Ottosen failure criterion is proposed and verified by the true triaxial strength test data of concrete and rock.

• 基于从Matsuoka-Nakai；Lade-Duncan和Ottosen等强度破坏准则导出的角隅函数；提出了修正的Ottosen强度破坏准则表达式；并通过混凝土和岩石的真三轴强度破坏试验结果进行验证.