土石坝应力路径数值分析

Numerical Analysis on Stress Path for Earth-Rock Dam

对糯扎渡心墙堆石坝进行有限元数值分析,研究了坝体内各点应力路径。结果表明,无论是填筑期,还是蓄水期,坝体内各点都为等应力比的应力路径。大主应力与小主应力之比基本保持恒定,但填筑期及蓄水期的比值大小不同。可为进一步研究适合于土石坝应力变形分析的本构模型提供参考。

The way of finite element numerical analysis is used to study the stress path of each point inside Nuozhadu core rock-fill dam, and it concludes that each point inside the dam has a stress path of equal stress ratio either in filling stage or during impoundment period. The ratio between major and minor principal stresses basically keeps stable, while it varies between filling and impoundment periods. The conclusion may facilitate the study of constitutive model for the analysis on stress deformation of earth-rock dam.