caa a22 4500 47584324X CHVBK 20180406123906.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1010708113426 doi (NATIONALLICENCE)springer-10.1023/A:1010708113426 Study of Acoustic Surface Waveguides on Reinforced Concrete Slabs [Elektronische Daten] [Hung-Liang Chen, Komwut Wissawapaisal] This paper describes the development of a two-dimensional acoustic surface waveguide system to enhance the transmission of Acoustic Emission (AE) signals in high attenuation concrete materials. The design of the surface waveguide system and the AE source location results are described. In this study, steel wires were selected as a waveguide material and were attached on the surface area of reinforced concrete structures. AE sensors were mounted at the end of the waveguides. The waveguides were connected to a concrete slab at joints with small contact areas using epoxy. This minimizes the amount of AE energy that could dissipate back to concrete. Thus, AE signals can be transmitted a longer distance. Experiments using standard pencil-lead breaks were conducted at 49 locations on a surface of a reinforced concrete floor slab to provide artificial AE signals. High transmission efficiencies were experimentally determined for the epoxy joints developed to attach the waveguides on the concrete surface. Results confirm that the use of the two-dimensional surface waveguides can significantly increase the AE monitoring range. A multi-layer Neural Network (NN) system was employed to predict locations of the AE sources. Four data sets of AE parameters and their corresponding 49 source locations in each data set were used to train the NN system. A testing data set was then used to demonstrate the ability of the NN in identifying the locations of the AE sources. Satisfactory prediction results from the NN were obtained. Plenum Publishing Corporation, 2000 Acoustic Emission nationallicence waveguide nationallicence nondestructive evaluation nationallicence concrete nationallicence neural network nationallicence Chen Hung-Liang Dept. of Civil and Environmental Eng., West Virginia University, 26506, Morgantown, WV aut Wissawapaisal Komwut Dept. of Civil and Environmental Eng., West Virginia University, 26506, Morgantown, WV aut Journal of Nondestructive Evaluation Kluwer Academic Publishers-Plenum Publishers 19/4(2000-12-01), 129-140 0195-9298 19:4<129 2000 19 10921 https://doi.org/10.1023/A:1010708113426 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1010708113426 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Hung-Liang Dept. of Civil and Environmental Eng., West Virginia University, 26506, Morgantown, WV aut NATIONALLICENCE 700 1- Wissawapaisal Komwut Dept. of Civil and Environmental Eng., West Virginia University, 26506, Morgantown, WV aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Kluwer Academic Publishers-Plenum Publishers 19/4(2000-12-01), 129-140 0195-9298 19:4<129 2000 19 10921 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer