The faculty member Prof. Dr. Maytham Mutashar Sharqi from the Department of Surveying Engineering at the University of Baghdad participated as a committee member for the master’s thesis defense titled “Application of Digital Video Imaging Technique to Capture Dynamic Behaviors of Various Concrete Beams under Vertical Loading,” presented by the researcher Sinaria Ahmed Saber on Tuesday, May 28, 2023, in the Department of Surveying Engineering Technology at the Middle Technical University, Baghdad. The thesis aimed to apply tomographic imaging techniques to capture the dynamic deformation of different types of concrete beams under vertical load, developing a new videogrammetry system to measure the dynamic deformations of concrete beams under vertical loading. Additionally, the thesis evaluated the accuracy of the developed video surveying method by testing it to capture the dynamic deformations occurring in three concrete beams with different mix ratios due to the application of dynamic vertical load. It also analyzed the efficiency of video measurements in detecting deformations in concrete beams compared to the same data obtained from typical civil engineering testing procedures (dial gauge) and theoretical calculations.
The discussion committee consisted of:
- Prof. Dr. Salem Huraiz Jasam / Institute of Technical Trainers Preparation, Chair
- Prof. Dr. Maytham Mutashar Sharqi / University of Baghdad, College of Engineering, Member
- Dr. Ahmed Hussein Hamdallah / Technical Engineering College, Member
- Assoc. Prof. Dr. Jasim Ahmed Ali / Technical Engineering College, Supervisor and Member
- Assist. Prof. Rana Muzahim Hamdoon / Technical Engineering College, Supervisor and Member
The thesis resulted in several recommendations, including:
The field of near-range digital photogrammetry has witnessed tremendous growth in its potential applications. New research lines could be driven by the subjects of this study. The field of inspection and testing has many suggestions for future research projects.
Here is a summary of video measurement methods used for a variety of beam types:
- Use other types of cameras, such as high-speed cameras, to capture 3D coordinates of moving objects and compare their results with those of digital cameras.
- Use more than two video cameras (at least four) to improve the accuracy of 3D GCP points derived from videos and create accurate 3D surface clouds for the tested beams.
- For video recording, weather and lighting conditions should be ideal, and work should be avoided on cloudy or stormy winter days to minimize external effects.
- Use an electric hydraulic jack instead of a manual jack and ensure the testing device has safety mechanisms to prevent excessive weight use.
- If you want to cover a larger area and obtain better results, you should use more than two cameras.
- To get the best results when testing concrete beams with a video camera at night, it is recommended to use a denser type of LED light or adjust the brightness of the LED colors used to synchronize the frames.
- Introducing video imaging technology for monitoring and tracking bridge collapses and displacements resulting from movement.
