JDR Vol.12 No.3 pp. 470-477
doi: 10.20965/jdr.2017.p0470


Wave-Guided Acoustic Emission Signals of Concrete Slab Obtained by Fatigue Testing on Wheel-Load Machine

Mitsuharu Shiwa*1,†, Zhengwang Li*2, Takuya Maeshima*3, Yasuhiro Koda*3, and Yasushi Tanaka*4

*1National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan

Corresponding author

*2Nippon Physical Acoustics, Ltd., Tokyo, Japan

*3Department of Civil Engineering, College of Engineering, Nihon University, Fukushima, Japan

*4Institute of industrial Science, The University of Tokyo, Tokyo, Japan

September 20, 2016
February 12, 2017
Online released:
May 29, 2017
June 1, 2017
acoustic emission, waveguide, reinforced concrete slab, fatigue testing, wheel load

Wave-guided acoustic emission (AE) signals of a reinforced-concrete slab were evaluated by fatigue testing on a wheel-load machine. Two resonant AE sensors, each with a frequency of 60 kHz, were installed at both ends of a reinforcement rod used as an AE waveguides. The detected AE signals indicated the transverse-wave radiation patterns of vertical and horizontal cracks located at the interface between the concrete and the waveguide. The activity of the cumulative AE energies corresponded to the live-load deflection and vertical-strain phenomena.

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Last updated on Feb. 20, 2018