【摘要】 基于大坝变形失稳的简化力学模型，考虑裂隙的非线性应变软化和渗水软化，根据突变理论推导了大坝变形失稳的尖点突变模型，并利用该模型对大坝变形失稳的机理和力学条件进行了分析，从整体上深化了对大坝变形失稳机制的认识。更多还原

【Abstract】 Based on the simple mechanical model of large dam deformation,the cusp catastrophe model of large dam destabilization is established by the catastrophe theory in this paper. The nonlinear strain and water permeating weakening of the crack of the dam are taken into consideration. The mechanism of deformation and destabilization process of large dam as well as its force condition are qualitively analyzed. The discussion presented in this paper may be helpful to wholely understanding the mechanism of large dam destabilization.更多还原