张慧梅;王焕;张嘉凡;程树范;周洪文;

• 1:西安科技大学力学系
• 2:上海应用技术大学城市建设与安全工程学院

摘要(Abstract)：

为研究冻融环境下岩石细观损伤演化规律,以红砂岩为研究对象,首先进行冻融循环试验,再对经历0次,5次,10次,20次和40次冻融循环的试样进行CT扫描.采用K均值聚类算法实现了扫描图像的二维孔隙识别;通过三维重构再现了红砂岩的冻融破坏模式,确定了试样的有效承载区,在细观层面实现了对岩石冻融损伤的定量分析.结果表明:通过K均值聚类算法确定阈值,可以有效实现CT图像的二值化;三维重构后的模型可以再现红砂岩试样在冻融过程中的损伤模式以及内部孔隙的发育特征;随冻融循环次数的增加,基于有效承载区定义的损伤变量逐渐增大,并与孔隙的发育趋势一致,能有效地反映冻融循环作用下岩石的损伤演化规律,为冻融岩石细观损伤研究提供了一种切实可行的方法.

关键词(KeyWords)： 冻融岩石;CT扫描;图像处理;三维重构;细观损伤

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（11172232,51774231）;; 陕西省自然科学基础研究计划资助项目（2018JQ4026）;; 河南省交通运输科技计划项目（2018J11）

作者(Authors): 张慧梅;王焕;张嘉凡;程树范;周洪文;

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