A comparative analysis of metal bar bending under loads, using different geodetic methods: geometric leveling, trigonometric leveling and close-range Photogrammetry

Abstract

The analysis of bending and deformation of metallic structures are an important part in monitoring these structures. Understanding its behavior under stress (displacements) is important to guarantee safety and durability when used in structures or even to ensure that they behave as designed. In this context, the use of advanced geodetic measurement methods plays a role. This study focuses on the analysis of the bending of a metal bar using three different measurement methods: close-range terrestrial photogrammetry, leap-frog trigonometric leveling and precision geometric leveling. Each of these methods has its own advantages and challenges. Throughout this work, its characteristics are explored, as well as the steps involved in data collection and processing, contributing to a more comprehensive understanding of the possibilities and limitations in the bending analysis of structures. The results of this study indicate that the three chosen methods are capable of monitoring structures like the one chosen here, for the loads adopted here, with maximum differences between the results for the three methods in the order of 1mm, when the maximum load is applied.