土石坝应力稳定分析的摄动随机元应用

Application of stochastic element in stress stability analysis of earth-rock dam

作为防渗体系的土石坝 ,其所含介质受非均匀性、非线性性状、不连续性和复杂的边界条件等因素的影响 ,一般很难获得解析解。摄动随机有限元是一种考虑可靠度随机性的有限元方法 ,它可以考虑岩土工程中存在着的很多的不确定因素 ,并对岩土工程各种边界条件和非线性应力应变土体本构关系有着较强的适应性。讨论了土石坝的应力稳定分析 。

Because of complex boundary conditions and in-homogeneous, non-linear and discontinuous features of backfilled materials contained in seepage control system, it is difficult to obtain the analytic solution of stress-strain for earth-rock dam. The perturbation stochastic finite element method, with considering stochastic property of reliability, can treat many uncertain factors in geotechnical engineering and has a good adaptability to various boundary conditions in geotechnical engineering computation and non-linear stress-strain constitution relation of soil body. The stress stability analysis and non-linear stochastic finite element analysis of earth-rock dam are discussed.