坝坡失稳的突变分析与判据研究  

Catastrophic Analysis of Instability of Dam Slope and Failure Criterion

作　　者：刘亚莲[1,2] 周翠英[1] 

机构地区：[1]中山大学工学院岩土工程与信息技术研究中心,广东广州510275 [2]广东水利电力职业技术学院,广东广州510635

出　　处：《水电能源科学》2010年第5期56-58,共3页Water Resources and Power

基　　金：广东省自然科学基金资助项目(07006119)

摘　　要：针对坝坡失稳是一个由土体连续变形到坝坡突然滑动的复杂的非线性动力学过程,应用突变理论建立了考虑坝体材料应变软化效应和水致弱化效应的尖点突变模型,运用非平衡相变理论解释了坝坡失稳的非平衡相变过程。通过对突变模型进行平衡分析获得了坝坡失稳的力学判据,在此基础上通过对失稳判据的分析,获得了坝坡失稳的临界位移,可为土坝稳定分析和安全评价提供新的思路。Dam slope instability is a complex nonlinear dynamic process caused by continuous deformation of soil to suddenly slide of dam slope.A cusp catastrophic model,which covers strain softening effect of dam material and water weakening effect,is established,based on the catastrophic theory.Non-equilibrium transition process of dam slope instability is explained by non-equilibrium transition theorem.The mechanical criterion of instability of dam slope is obtained by equilibrium analysis of catastrophic model.The...

关 键 词：土坝 失稳 非平衡相变 尖点突变模型 破坏判据 

分 类 号：TV221.2[水利工程—水工结构工程]