A self-referencing non-destructive test method to detect damage in reinforced concrete bridge decks using nonlinear vibration response characteristics
نویسندگان
چکیده
Several non-destructive test (NDT) methods, namely visual inspection, hammer sounding, chain drag, impulse response testing, impact echo ultrasonic (array) and under certain conditions ground penetrating radar (GPR) are currently used to detect estimate the extent of damage such as delaminations in reinforced concrete bridge decks. In this article, we present a self-referencing NDT method that builds on (IR) testing using nonlinear vibration characteristics. The hypothesis is for an undamaged deck, varying force applied specific point does not affect corresponding frequency function (FRF) frequencies lie within measurement system’s linear operating range. On other hand, FRF contains changes when increased, indicating response. To demonstrate concept works theoretically, two 2D finite element (FE) models one containing shallow delamination, were developed their responses forces increasing amplitude compared. IR data from in-service deck was processed analyzed. Visual inspection results ultra-high-pressure hydro-blasting performed rehabilitation purposes provided opportunity compare obtained with common methods actual extent. Based observations, new index, referred index (NVI), proposed shown be sensitive damage, including missed by means inspection.
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ژورنال
عنوان ژورنال: Construction and Building Materials
سال: 2022
ISSN: ['1879-0526', '0950-0618']
DOI: https://doi.org/10.1016/j.conbuildmat.2021.125924