摘要
基于现有的医用X射线CT机器,成功研制与其配套的专用动态加载设备,形成类岩材料CT试验系统。归纳类岩材料CT研究的几个关键问题。介绍类岩材料CT试验过程,重点分析加载设备使用过程存在的问题,特别是试件的黏结、试样对中、装样等问题。以混凝土为例,给出动压CT试验的初步成果,并且进行混凝土裂纹流变CT试验。结果表明该加载设备达到设计要求,可以实现混凝土动态加载过程中裂纹演化过程的准实时观测,并且裂纹流变的影响在大多数情况下可以忽略,为探索类岩材料在动载作用下的损伤演化规律提供新的研究途径。
A portable test device based on the conventional medical CT scanner is developed; and a test system of rock-like material is formed. Some key problems in rock-like material test by CT are analyzed. Concrete test procedure of CT and some problems during test, including sample binding, alignment and fixing, are summarized. The preliminary dynamic pressure results of concrete by CT are given. And concrete crack rheological test by CT is carried out as well. The results indicate that this loading device satisfies the design demand. Concrete crack evolvement during dynamic loading process can be detected with a similar real time by CT; and crack rheological effect can be ignored in many cases. It has brought forth some new ideas to the study of dynamic behavior and damage law of rock-like material under dynamic loading.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2009年第8期1620-1628,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50649028
90510017)
水利公益性行业科研专项经费项目(2007SHZ1–200701004)
关键词
岩石力学
类岩石材料
加载设备
试验系统
rock mechanics
rock-like material
loading device
test system
