Abstract—Over the last few years due to sharp increase in experimental investigations in the field of structural engineering, the necessity for reliable and precise deformation measurement is felt more than ever. The most common experimental test in the field of structural engineering is bending test in which beam’s deformation is evaluated in order to calculate other structural parameters. One of the most usual techniques for obtaining beam’s deformation is utilizing Linear Variable Differential Transformer (LVDT) sensors. However, non-mechanical procedures for displacement measurement have shown much interest between researchers. Photogrammetry, Digital Image Correlation (DIC) method and Particle Image Velocimetry (PIV) are some of the new image-based methods for displacement measurement. Due to the advantages of PIV method in the field of experimental fluid mechanics and Geotechnics, the current study has been focused on the performance of PIV method for displacement measurement of bending test in structural engineering. To reach the aforementioned goal, one steel I-beam was subjected to four-point flexural loading and the load-displacement curve was plotted using PIV method. The experimental results obtained from the PIV method showed excellent agreement with LVDT’s data. It is concluded that due to the lower cost and potential of obtaining whole displacement field on common bending tests, PIV method could be widely used as an alternative to conventional measurement techniques in structural engineering.
Index Terms—Bending test, digital image correlation (DIC), displacement measurement, linear variable differential transformer (LVDT), particle image velocimetry (PIV). (PIV).
The authors are with the Civil Engineering Department, Isfahan University of Technology (IUT), Isfahan, Iran. (e-mail: a.hosseini@cv.iut.ac.ir; dmostofi@cv.iut.ac.ir; hajialilue@Tabrizu.ac.ir).
Cite: Ardalan Hosseini, Davood Mostofinejad, and Masoud Hajialilue-Bonab, "Displacement Measurement of Bending Tests Using Digital Image Analysis Method," International Journal of Engineering and Technology vol. 4, no. 5, pp. 642-644, 2012.
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