摘要
采用广义Kelvin模型、Burgers模型和六元件黏弹性流变模型,分别对硬性结构面的剪切蠕变曲线进行拟合分析,并对FLAC3D中的interface单元进行修正,提出硬性结构面的剪切流变模型及剪切蠕变试验的数值分析方法。研究结果表明:六元件剪切流变模型适合用于硬性结构面的剪切蠕变特性分析;当结构面的爬坡角小于45°时,剪切蠕变变形会随着爬坡角的增加而增加,而当爬坡角大于45°时,剪切蠕变变形会随着爬坡角的增加而减小;当法向应力不变时,剪切蠕变变形将随着剪切应力的逐渐增加而增加;当切向应力不变时,剪切蠕变变形将随着法向应力的逐渐增加而减小。
The shear creep curve of hard structural surface was analyzed by using generalized Kelvin model,Burgers model and six-component rheological model,respectively. The interface element in FLAC3 D was improved. The shear rheological model and numerical analysis method of shear creep test of hard structural surface were put forward. The research result shows that the six-component viscoelastic shear rheological model is appropriate for analyzing the shear creep property of hard structural surface. The shear creep deformation increases with increasing slope ratio if the slope ratio is smaller than 45°,while the result will be quite on the contrary if the slope ratio is higher than 45°. In addition,the shear creep deformation will increase with increasing shear stress under fixed normal stress,and the shear creep deformation will decrease with increasing normal stress under fixed shear stress.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第S1期2894-2899,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
长江科学院开放研究基金资助项目(CKWV2014207/KY)
浙江省自然科学基金项目(LY13E080021)
宁波市自然科学基金项目(2011A610072)
