Array-measurement-based algorithm for detecting debonded regions between concrete matrix and steel reinforcing bars in concrete samples
作者： Yong Joe Kim , Paolo Gardoni , Je Heon Han , Alex Pagnotta
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摘要: The objective of this study is to develop an array measurement-based algorithm identify debonded regions between the concrete matrix and steel reinforcing bars structures. In proposed procedure, impact hammer excites one end a sample tri-axial accelerometer then used measure resulting vibration responses on both surfaces sample. Then, MUltiple SIgnal Classification (MUSIC) locate as “passive” sources where reflective waves are generated. order suppress effects direct generated from excitation well boundaries at ends that make it almost impossible detect subtle region, modified steering vectors calculated finite element model including boundary-reflective waves. scan calculate 2-D MUSIC
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