期刊论文

Zhang, Qiu-Cai(993346194@qq.com)

中文

工程力学

1000-4750

2017

34

6

17-27

10.6052/j.issn.1000-4750.2015.12.0967

国家自然科学基金项目(51404179) 南华大学校级创新团队计划项目(NHCXTD04) 南华大学博士启动基金项目(2014XQD09)

本校为第一且通讯机构

应力长期作用下岩体内部损伤不断累积、扩展,导致部分承载单元丧失承载能力,使得岩体内部真实应力强度大于表观应力。该文以流变学理论为基础,将损伤因子引入弹性元件及黏性元件中,给出弹性损伤元件及黏性损伤元件的蠕变特征方程,用以描述持荷过程中由于损伤累积而呈现出蠕变与时间相关的非线性变形特征;然后以弹性损伤元件及黏性损伤元件的蠕变特征方程为基础,给出考虑损伤效应的经典组合模型的蠕变状态方程,并依据稳定蠕变过程中蠕变变形的组成特征,构建了用于描述软岩稳定蠕变的五元件变参数非线性蠕变损伤模型,同时给出了蠕变损伤组合模型的蠕变变形特征方程;最后以江西东乡铜矿砂质页岩稳定...

The loss in bearing capability of partial bearing elements, which are subjected to the loads in the long-term, will be induced by the accumulation and development of internal damage. Because of the above phenomenon, the actual stress strength in internal parts of rocks is usually higher than the apparent stress strength. Based on rheology theory, the damage factor is introduced into the elastic and viscous elements. The creep equations of elastic-damage and viscous-damage element, which are used to depict the time-depending nonlinear characteri...