期刊
STRUCTURAL CONTROL & HEALTH MONITORING
卷 29, 期 12, 页码 -出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/stc.3130
关键词
acoustic emission; brick masonry; damage state; shear; uniaxial compression
资金
- National Natural Science Foundation of China [52208323, 52108290, 51778587, 51808510]
- Key Scientific and Technological Research Projects of Henan Province [212102310975, 222102320436]
Brick masonry structures will suffer damage in long-term service, with compression and shear being common damage modes. Research has shown that shear damage exhibits more obvious brittle characteristics, and acoustic emission technology can effectively assess the damage state of brick masonry.
Brick masonry structures will suffer different degrees of damage in their long-term service. The common damage modes involve compression and shear damage. The acoustic emission (AE) technology, including improved b-value (Ib-value), signal intensity analysis, and the k-means clustering method, was carried out during uniaxial compression and shear experiments to qualitatively and quantitatively assess the damage state of the brick masonry. Results demonstrate that the shear damage exhibits a more obvious brittle failure characteristic compared with the uniaxial compression damage. The Ib-value could reflect the damage evolution state of the brick masonry whether it is uniaxial or shear damage (i.e., every decrease in the Ib-value is a manifestation of damage expansion). The boundary of HI-S-r in the signal intensity analysis is proposed to differentiate the mild, moderate, and serious damage under uniaxial compressive, and the boundary is proposed to distinguish the mild and serious damage under shear. The appearance of the signal cluster with the highest ring count, energy, and duration implies the failure of the brick masonry under uniaxial compressive and shear.
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