摘要
本文在对岩石材料受纯剪应力和单轴压缩应力条件下的非线性粘塑性蠕变的研究基础上,进一步提出了在法向压应力状态下岩石材料的非线性粘塑性蠕变特性和相应的力学模型;并将该力学模型应用于西南某电站水工隧洞周边的围岩,利用粘性增量初应变有限元法分析计算了在法向压应力影响下隧洞围岩非线性粘塑性变形的力学效应。
Based upon the researches on the nonlinear viscoplastic creep of rock materials exposed to the pure shearing stresses or uniaxial compressive stresses, the effects of the normal compressive stress on the nonlinear viscoplastic creep properties of rock materials are further put forward in this paper. A mechanical model showing these effects is set up and the model is applied to the tunnel-surrounding-rock mass of a hydroelectric power station in the southwestern part of China. By the use of FEM of the initial viscoplastic incremental strain, the mechanical effects of the normal compressive stress on nonlinear viscoplastic deformation of tunnel-surrounding-rock mass are computed and analysed.
出处
《土木工程学报》
EI
CSCD
北大核心
1993年第5期43-49,共7页
China Civil Engineering Journal
基金
国家自然科学基金
