水资源与水工程学报2024，Vol.35Issue(1)：143-153,11.DOI:10.11705/j.issn.1672-643X.2024.01.17
基于DIC技术的自密实混凝土界面裂缝扩展规律研究
Crack propagation behavior of self-compacting concrete interface based on DIC method
摘要
Abstract
A novel engineering structure is introduced,in which the self-compacting concrete is used as the anti-abrasion layer of the rock-filled concrete dam,and then cast in place with the dam body.Therefore,the performance of the interface between the anti-abrasion layer and the dam body is crucial to the stability of the whole structure.600 mm×600 mm×600 mm self-compacting concrete(SCC)specimens(C40SCC,C25SCC)and layered pouring specimens(C40-C25SCC)were prepared for the splitting tensile tests,and the digital image correlation(DIC)technique was adopted for the analysis of the crack propagation behavior at the SCC interface.The results show that the failure modes of SCC were the splitting and spalling of aggre-gates;the splitting tensile strengths of C40SCC,C25SCC and C40-C25SCC were 1.861,1.416 and 1.362 MPa,respectively.The crack-related parameters were obtained based on DIC technique,among which the maximum crack opening width and propagation time of C40-C25SCC were the largest,measuring 0.125 mm and 10.667 ms,respectively.The fastest crack propagation speed was observed in C25SCC,which was 10.12 m/s.The study demonstrates that the presence and size of aggregates affect the failure mode of the speci-mens,as well as the variation of crack opening width and propagation speed.关键词
自密实混凝土/堆石混凝土/劈裂抗拉强度/数字图像技术/裂缝扩展规律Key words
self-compacting concrete(SCC)/rock-filled concrete(RFC)/splitting tensile strength/digit-al image correlation(DIC)/crack propagation behavior分类
建筑与水利引用本文复制引用
罗滔,李骄洋,张天祺,金峰..基于DIC技术的自密实混凝土界面裂缝扩展规律研究[J].水资源与水工程学报,2024,35(1):143-153,11.基金项目
国家自然科学基金青年项目(51909223) （51909223）
国家自然科学基金重点项目(52039005) （52039005）
陕西省青年科技新星项目(2022KJXX-85) （2022KJXX-85）
清华大学水圈科学与水利工程全国重点实验室开放基金项目(sklhse-2023-C-04) （sklhse-2023-C-04）
