摘要
研究混凝土劈裂抗拉声发射特性,结果表明试件的劈裂抗拉破坏过程基本符合混凝土轴心受拉破坏的特征,可近似认为试件是轴心受拉破坏。在应变很小时,声发射信号非常微弱;随着应变的增大,声发射信号逐渐增强,混凝土损伤不断发展;随损伤发展到一定程度,声发射能率迅速增大到峰值,之后进入衰减期。表明利用声发射技术研究混凝土劈裂抗拉行为的可能性。
The acoustic emission characteristics of concrete cleavage were studied,it was shown that the process of concrete cleavage destruction accorded with the characteristics of concrete axle center destruction which could be seen axle center destruction. When the strain was small, the signal of acoustic emission was very faint,with the strain enchanced, the signal strengthened gradually and concrete loses developed,when concrete loses developed to a certain degree, the energe rate of acoustic emission leaded to peak value and entered attenuation scheduled time afterwards. The experiment indicated the behavior possibility of making use of the sound launch technology to study concrete cleavage.
出处
《安徽建筑工业学院学报（自然科学版）》
2008年第1期27-30,共4页
Journal of Anhui Institute of Architecture(Natural Science)
基金
浙江省水利厅科技项目(RC0706)
关键词
混凝土
劈裂抗拉
声发射
Concrete
Cleavage
Acoustic emission
