长江科学院院报Issue(8)：131-134,4.DOI:10.3969/j.issn.1001-5485.2015.08.024
基于声发射技术的混凝土动态劈拉试验研究
Dynamic Splitting Tensile Test on Concrete By Using Acoustic Emission Technology
胡伟华 1吴彬 2彭刚 3王孝政4
作者信息
- 1. 十堰市建筑设计研究院，湖北 十堰 442000
- 2. 三峡大学 土木与建筑学院，湖北 宜昌 443002
- 3. 湖北工业职业技术学院 建筑工程系，湖北 十堰 442000
- 4. 三峡大学 土木与建筑学院，湖北 宜昌 443002
- 折叠
摘要
Abstract
To research the dynamic mechanical properties of concrete in tension,splitting tensile tests were per-formed on concrete under different strain rates(1 0 -5 /s,1 0 -4 /s,1 0 -3 /s,1 0 -2 /s)using nondestructive acoustic e-mission technology.According to the real-time acquired acoustic emission data,the corresponding relation between acoustic emission parameter and stress-time curves under different loading rates were established,and the charac-teristics and regularities of concrete’s energy release in the whole process of splitting tensile damage were analysed. Results showed that typical characteristics of three phase did not happen in the process of splitting tensile damage, emission signal was weak at the early stage of loading,and energy signal suddenly rose sharply when the concrete material reached peak stress.The acquired acoustic emission data could reflect the real splitting tensile damage of concrete.关键词
混凝土/动态劈拉试验/声发射/加载速率/本构模型Key words
concrete/dynamic splitting tensile test/acoustic emission/loading rate/constitutive model分类
建筑与水利引用本文复制引用
胡伟华,吴彬,彭刚,王孝政..基于声发射技术的混凝土动态劈拉试验研究[J].长江科学院院报,2015,(8):131-134,4.
