Systematic reliability analysis of high rock-fill dam slope stability

The reliability of high rock-fill dam slope is a complex systematic reliability analysis, which is one of the core and difficult technological problems in dam design. Based on the deterministic finite element method, the system reliability analysis method of high rock-fill dam slope stability using nonlinear indexes is proposed here by integrating strength reduction method, response surface method, stepping equivalent linear method and Ditlevsen narrow-bound method, solving the problems of main failure mode search, performance function establishment based on the material yield criterion, reliability of unit, the correlation coefficient, destruction probability of the main failure mode and the systematic reliability analysis encountered in large-scale 3D structures composed of granular materials. The new method was successfully employed to the reliability analysis of Shuang Jiangkou high rock-fill dam slope stability in Si Chuan Province, China and thus its rationality and usability was verified. The analysis method presented provides an effective solution of complex dam labor structure systematic reliability analysis problems and has the promotion application value in the reliability analysis of large-scale complex 3-D block body structures.