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2
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6
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Journal of Material Sciences and Engineering| ISSN: 2169-0022 | GDCSM-2018 | Volume: 7
Electro-mechanical impedance-based damage detection of concrete beam under impact loading
Shuli Fan
Dalian University of Technology, China
S
hip and vehicle collision with pier can trigger catastrophic calamity on bridge structures. It is essential to quantify the collision
damage degree of pier after collision and to take steps for preventing the full structural failure. The novelty in this paper is the
development of a relationship of the root-mean-square deviation (RMSD) index and the damage volume ratio of bridge pier after
collision that allows for the quantification of damage degree of concrete based on the observed impedance signatures. The bridge pier
is simplified to a concrete beam subjected to continuous impact loading by a freefalling steel ball. The concrete damaged plasticity
constitutive model is utilized in numerical analysis to simulate the damage development of concrete beam under impact loading. The
RMSD is used as a damage index to quantify and evaluate the variations in admittance signals measured by lead-zirconate-titanate
(PZT) patches and compared to the damage volume ratio computed by numerical analysis. The results demonstrate that the RMSD
index and the damage ratio of concrete have good agreement. The Electro-mechanical impedance (EMI) technique based on PZT
patches can keenly detect the impact damage of concrete and the RMSD index can effectively quantify the damage degree of concrete
caused by impact loading.
shlfan@163.comJ Material Sci Eng 2018, Volume: 7
DOI: 10.4172/2169-0022-C3-098