摘要
通过周期性循环载荷作用下的烘干、自然干燥、饱水等3种不同水饱和度时细粒砂岩变形特性及其滞回曲线演化规律的实验研究,分析结果发现随着岩石含水量的不断增加,岩石的强度、变形及其弹性模量将随之减小,每次循环形成的滞回曲线的变化有越加明显的演化趋势,但是随着循环次数的增加各个应变相对残余变量均逐渐趋于稳定。同时发现,岩石变形的弹性后效现象受含水量的影响甚微。
This paper has probed into the deformation characteristics of stove - dried, air - dried and water - saturated fine - sandstone with three different water saturations and the evolution of their hysteresis curves under the cyclic loading by the experimental research. The following results have been indicated ： with the increase of its water content of the fine - sandstone, its strength, deformation and elastic modulus reduced, the changes of its hysteresis curve in each circulation have the tendency of more and more obvious evolution, but with the increase of cyclic count of loading the absolute value of the each relative remnants of strain gradually becomes invariable. Meanwhile, it has been detected that the effect of water content on the elastic aftereffect of the deformation of the fine - sandstone is very lower.
出处
《矿业研究与开发》
CAS
北大核心
2007年第3期18-21,共4页
Mining Research and Development
基金
国家自然科学基金资助项目(50574108)
重庆大学研究生科技创新基金资助项目(200603Y1A0060149)
关键词
周期性循环荷载
滞回曲线
水饱和度
细粒砂岩
Cyclic loading, Hysteresis curve, Water saturation, Fine - sandstone
