摘要
本文根据三峡枢纽三斗坪坝址区各类岩体结构面室内剪切蠕变试验的剪应变-时间关系曲线,得出了蠕变经验方程,它们在初始蠕变阶段为负指数函数形式;等速蠕变阶段为线性函数。而后,又将经验方程进一步抽象化,给出了三峡枢纽岩体结构面的蠕变全过程组合模型,并计算了所给模型方程中的各种参数。本文提出的蠕变全过程模型,描述了岩体结构面应力-应变-时间关系,它为数值分析提供了基础。
On the basis of the y-t curve of the lab shear creep test for three kinds of discontinuities in Three Gorges project, creep empirical equations were established and it was found that the curve-fitting expressions for primary creep stage are of negative exponential function form, and for the steady state creep stage are linear function.After processing of the above empirical equations, we worked out a combined model of the whole creep process, and calculated the various parameters of the model. The obtained model of the whole creep process described the stress-strain-time relation for the discontinuity, and offered a basis for numerical analysis.
出处
《长江科学院院报》
CSCD
北大核心
1992年第1期42-46,共5页
Journal of Changjiang River Scientific Research Institute
关键词
三峡工程
岩体
结构面
蠕变模型
shear creep
creep model
rock mass discontinuity
creep parameter
