Videogrammetric method for measuring of concrete beam deformations under dynamic vertical loading
Many studies have examined their use in civil and close-range applications, including building structural monitoring due to advances in videogrammetric systems. However, the videogrammetric system's ability to reliably identify concrete beam dynamic deformations under vertical loads has not been fully studied. This study aims to examine the efficacy of the videogrammetric system in detecting the dynamic deformation of various concrete beams through the utilization of the videogrammetry technique. The researchers utilized PhotoModeler software to generate a three-dimensional stereo model of concrete beams. This was done both before and after applying a vertical load. The primary objective of this research is to determine the deflection values exhibited by these beams. The videogrammetric system employs a pair of stationary video cameras to record the dynamic deformations of loaded beams. This study involves the selection and calibration of two identical model video cameras, specifically the Canon IXUS. In the practical trials, three distinct types of concrete beam sections of identical length are employed. The beams possess cross-sectional dimensions of 10×13×300 cm and have been chosen with varying compositions. In the laboratory setting, the apparatus is utilized to apply a consistent load to each of the three beams. The video results are subsequently examined based on the civil design calculations. The study provides evidence that the utilization of videogrammetric system approaches enables accurate and efficient measurement of deformation in various types of concrete beams, achieving precision at the millimeter level. Based on the aforementioned findings, it is evident that this particular technique holds the potential for effective implementation and utilization in the context of conducting destructive inspections on critical civil structural components


