التفاصيل البيبلوغرافية
| العنوان: |
Study on propagation mechanism and attenuation law of acoustic emission waves for damage of prestressed steel strands. |
| المؤلفون: |
Hou, Jie1,2 (AUTHOR), Wang, Chao1,2 (AUTHOR), Li, Shengli1,2 (AUTHOR) lsl@zzu.edu.cn, Jiang, Nan3 (AUTHOR), Xu, Bin1,2 (AUTHOR), Wu, Guangming1,2 (AUTHOR) |
| المصدر: |
Measurement (02632241). Sep2023, Vol. 219, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*ACOUSTIC emission, *SOUND waves, *PRESTRESSED concrete beams, *ACOUSTIC wave propagation, *STEEL, *ATTENUATION coefficients, *THEORY of wave motion |
| مستخلص: |
• Visualization of AE waves propagation in prestressed steel strand by numerical simulation. • AE frequency, amplitude and energy attenuation laws in prestressed steel strand with prestress levels. • AE amplitude and energy attenuation laws in prestressed steel strand of full-size prestressed hollow slab girder. The study of acoustic emission waves propagation mechanism and attenuation laws for damage of prestressed steel strands is the theoretical basis for acoustic emission health monitoring of prestressed steel strands such as stay cables, slings, suspenders, and concrete structures. Firstly, the propagation mechanism of acoustic emission waves in prestressed steel strands is studied using numerical simulation methods. Secondly, the amplitude and energy attenuation laws of acoustic emission waves caused by damage of prestressed steel strands are analyzed by experimental research, and the amplitude and energy attenuation models of the influence of prestress level are constructed. Finally, the constructed acoustic emission attenuation models are analyzed in combination with practical engineering. The results show that numerical simulation visualizes the propagation path of acoustic emission waves in prestressed steel strands; With the increase of prestress levels, the acoustic emission frequency distribution of prestressed steel strands damage ranges from 100 to 200 kHz, with a dominant frequency of 160 kHz, the acoustic emission amplitude and energy attenuation coefficients decrease, and the amplitude attenuation is slower than the energy attenuation; The acoustic emission amplitude attenuation of prestressed steel strands damage in prestressed hollow slab beams is 5 times faster than that of steel strands without surrounding media. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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