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- W2165371663 abstract "Over the past several decades, structural testing has become ever more expensive, and researchers from many leading funding agencies are pushing to capture more and better data with each structural test conducted. Three dimensional digital image correlation (3D-DIC), is a tool that is gaining popularity as one way that more detailed information can be captured as part of testing programs. In 3D-DIC, the measured object is photographed with a pair of digital cameras before, during and after a load event and a stochastic pattern marked on the object is tracked from one set of images to the next such that a full field of displacements is derived. Historically, along with the cost of the system, factors such as how to correctly specify appropriate testing protocol and how to correctly interpret the results have limited the application in structural testing. The current paper focuses on three main aspects of 3D-DIC technology. First, a treatment of the basic theory behind the method is provided, highlighting the strengths and limitations of use for structural testing. Included are recommendations and guidelines for accuracy and other lessons learned during deployment over a broad range of projects. Second, the flexibility of the technique and the wide range of applications where it can prove useful will be discussed. Several case studies show how the technology has enhanced understanding of structural behavior in applications as far ranging as testing of rammed earth walls under gravity loads, testing of concrete bearing walls under fire and gravity loading, testing of post-tensioned shear walls under earthquake loading, and dynamic testing of a moment frame under earthquake loading. Finally, an experimental set-up designed to develop a protocol for deploying multiple 3D-DIC sensors simultaneously during the same structural test will be presented. The experiment is designed to allow four camera pairs to capture the deformations of key structural components of a coupled post-tensioned shear wall system." @default.
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- W2165371663 date "2012-03-29" @default.
- W2165371663 modified "2023-09-27" @default.
- W2165371663 title "3-D Digital Image Correlation—An Underused Asset for Structural Testing" @default.
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- W2165371663 doi "https://doi.org/10.1061/9780784412367.172" @default.
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