Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Impact-echo method"”.
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Probabilistic impact-echo method for nondestructive detection of defects around steel reinforcing bars in reinforced concrete
… this dissertation assesses and improves the Impact-Echo (IE) method for the detection of defects around steel reinforcing bars in concrete. IE involves deducing the presence of a defect from several single-point recordings of a resonant response that results from a non-damaging impact. IE has …
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Advances in Nondestructive Testing of Concrete Pavements
Nondestructive testing methods to accurately determine concrete pavement thickness are in increasing demand for verification of performance-based specifications, as the only current technology that provides the required accuracy levels is core extraction. In this work two approaches for pavement …
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Modeling and detection of delaminations in laminated plates
… we present the Traction Boundary Element Method (TBEM) that is the tool we use to model scattering of waves by cracks in elastic media. A critical step in the TBEM is the evaluation of integrals with hypersingular kernels; we propose a novel approach to evaluate analytically these …
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Bond Performance between Corroded Steel and Recycled Aggregate Concrete Incorporating Nano Silica
… as water to binder ratio. The feasibility of the impact-echo method for identifying the corrosion was evaluated and compared to the corrosion obtained by mass loss method. The results showed that the impact-echo testing can be effectively used to qualitatively detect the damage caused by corrosion …
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Detection and assessment of wood decay – glulam beams and wooden utility poles
… of acoustic and ultrasonic inspection methods on wooden glulam beams and utility poles. All beams and poles examined where composed of Douglas-fir. The report begins with a description of the structure of trees, the mechanical behavior of wood subjected to rot, and current utility pole …