中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1898-1905.doi: 10.1088/1674-1056/18/5/030

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Concrete damage diagnosed by using non-classical nonlinear acoustic method

马力1, NazarovVE2, 周到3, 刘晓宙3, 龚秀芬3   

  1. (1)Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; (2)Institute of Applied Physics, Russian Academy of Science, Russian Federation; (3)Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2008-05-06 修回日期:2008-08-04 出版日期:2009-05-20 发布日期:2009-05-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10674066) and the Open Project in State Key Laboratory of Acoustics (Grant No 200802).

Concrete damage diagnosed using the non-classical nonlinear acoustic method

Zhou Dao(周到)a), Liu Xiao-Zhou(刘晓宙)a)†, Gong Xiu-Fen(龚秀芬)a), Nazarov V Eb), and Ma Li(马力)c)   

  1. a Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing University, Nanjing 210093, China; b Institute of Applied Physics, Russian Academy of Science, Russian Federation; c Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2008-05-06 Revised:2008-08-04 Online:2009-05-20 Published:2009-05-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10674066) and the Open Project in State Key Laboratory of Acoustics (Grant No 200802).

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摘要： It is known that the strength of concrete is seriously affected by damage and cracking. In this paper, six concrete samples under different damage levels are studied. The experimental results show a linear dependence of the resonance frequency shift on strain amplitude at the fundamental frequency, and approximate quadratic dependence of the amplitudes of the second and third harmonics on strain amplitude at the fundamental frequency as well. In addition, the amplitude of the third harmonics is shown to increase with the increase of damage level, which is even higher than that of the second harmonics in samples with higher damage levels. These are three properties of non-classical nonlinear acoustics. The nonlinear parameters increase from 106 to 108 with damage level, and are more sensitive to the damage level of the concrete than the linear parameters obtained by using traditional acoustics methods. So, this method based on non-classical nonlinear acoustics may provide a better means of non-destructive testing (NDT) of concrete and other porous materials.

关键词: concrete, non-classical nonlinear acoustics, non-destructive testing (NDT), crack

Abstract: It is known that the strength of concrete is seriously affected by damage and cracking. In this paper, six concrete samples under different damage levels are studied. The experimental results show a linear dependence of the resonance frequency shift on strain amplitude at the fundamental frequency, and approximate quadratic dependence of the amplitudes of the second and third harmonics on strain amplitude at the fundamental frequency as well. In addition, the amplitude of the third harmonics is shown to increase with the increase of damage level, which is even higher than that of the second harmonics in samples with higher damage levels. These are three properties of non-classical nonlinear acoustics. The nonlinear parameters increase from 106 to 108 with damage level, and are more sensitive to the damage level of the concrete than the linear parameters obtained by using traditional acoustics methods. So, this method based on non-classical nonlinear acoustics may provide a better means of non-destructive testing (NDT) of concrete and other porous materials.

Key words: concrete, non-classical nonlinear acoustics, non-destructive testing (NDT), crack

中图分类号:  (Nondestructive testing: ultrasonic testing, photoacoustic testing)

  • 81.70.Cv
62.20.M- (Structural failure of materials) 81.40.Np (Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure) 43.25.-x (Nonlinear acoustics) 62.65.+k (Acoustical properties of solids)