›› 2007, Vol. 28 ›› Issue (1): 123-126.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on crack propagation of mass concrete under effect of longitudinal wave

CHEN Ming, LU Wen-bo   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2005-03-14 Online:2007-01-10 Published:2013-08-28

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Abstract: Based on the theory of fracture dynamics, the analysis of the interaction of longitudinal wave and crack, and the dynamic fracture toughness of concrete, the deep or the perfoliate crack propagation of mass concrete under blasting longitudinal wave was studied; the safe peak particle velocity (PPV) for concrete with crack was obtained; and the effect of the frequency and the incidence angle of longitude wave was studied. The result indicated that the lower frequency and the higher incidence angle of longitudinal wave will easily lead to the crack propagation. On condition of frequency at 10 Hz and incidence angle at 90 degree, the safe PPV of concrete with crack is 0.95 cm/s; it is lower than the value on the handbook of construction planning of hydraulic and hydroelectric projects, which is 5 cm/s for concrete gravity dam and concrete sluice board, the concrete with crack is easily been destroyed.

Key words: longitudinal wave, concrete, fracture toughness, blasting vibration, peak particle velocity

CLC Number: 

  • TU 751.9
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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