dc.contributor.author	Epp, Tyler
dc.contributor.examiningcommittee	Svecova, Dagmar (Civil Engineering) Wu, Nan (Mechanical Engineering)	en_US
dc.contributor.supervisor	Cha, Young-Jin (Civil Engineering)	en_US
dc.date.accessioned	2017-07-27T21:24:43Z
dc.date.available	2017-07-27T21:24:43Z
dc.date.issued	2016	en_US
dc.degree.discipline	Civil Engineering	en_US
dc.degree.level	Master of Science (M.Sc.)	en_US
dc.description.abstract	Decline of the state of infrastructure in North America due to aging over the past decades has spawned burgeoning interest in the detection of internal damage of reinforced concrete (RC) structures via nondestructive testing. This study proposes a new impact-echo analysis method using wavelet transforms. The signals recorded from the microphones are analyzed using percentage of energy information to detect in-situ damages. Further, an artificial neural network (ANN) was used in order to test the feasibility of increasing the automaticity of the impact-echo method and a semi-autonomous sensing setup was used to the same end. The proposed wavelet transform-based approach showed improved accuracy when covering broader areas over conventional methods. The use of an ANN removed the need for a user-defined cutoff value for the classification of intact and damaged locations when a least-squared distance approach was used. It is postulated that this may contribute significantly to testing time reduction.	en_US
dc.description.note	October 2017	en_US
dc.identifier.citation	Epp, T., & Cha, Y. J. (2016). Air-coupled impact-echo damage detection in reinforced concrete using wavelet transforms. Smart Materials and Structures, 26(2), 025018.	en_US
dc.identifier.uri	http://hdl.handle.net/1993/32332
dc.language.iso	eng	en_US
dc.publisher	Smart Materials and Structures	en_US
dc.rights	open access	en_US
dc.subject	Impact-echo	en_US
dc.subject	Air-coupled	en_US
dc.subject	Acoustic	en_US
dc.subject	Wavelet transforms	en_US
dc.subject	ANN	en_US
dc.title	Air-coupled impact-echo damage detection in reinforced concrete using wavelet transforms	en_US
dc.type	master thesis	en_US

Air-coupled impact-echo damage detection in reinforced concrete using wavelet transforms

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