Deformation Analysis of a Composite Bridge during Proof Loading Using Point Cloud Processing

Abstract

Remote sensing in structural diagnostics has recently been gaining attention. These techniques allow the creation of three-dimensional projections of the measured objects, and are relatively easy to use. One of the most popular branches of remote sensing is terrestrial laser scanning. Laser scanners are fast and efficient, gathering up to one million points per second. However, the weakness of terrestrial laser scanning is the troublesome processing of point clouds. Currently, many studies deal with the subject of point cloud processing in various areas, but it seems that there are not many clear procedures that we can use in practice, which indicates that point cloud processing is one of the biggest challenges of this issue. To tackle that challenge we propose a general framework for studying the structural deformations of bridges. We performed an advanced object shape analysis of a composite foot-bridge, which is subject to spatial deformations during the proof loading process. The added value of this work is the comprehensive procedure for bridge evaluation, and adaptation of the spheres translation method procedure for use in bridge engineering. The aforementioned method is accurate for the study of structural element deformation under monotonic load. The study also includes a comparative analysis between results from the spheres translation method, a total station, and a deflectometer. The results are characterized by a high degree of convergence and reveal the highly complex state of deformation more clearly than can be concluded from other measurement methods, proving that laser scanning is a good method for examining bridge structures with several competitive advantages over mainstream measurement methods.

Vision Measurement of Tunnel Structures with Robust Modelling and Deep Learning Algorithms

“…Wiśniewski et al [ 24 ] proposed a total least squares collocation for determining the vertical deformations treated as random fields. Ziolkowski et al [ 25 ] performed an advanced object shape analysis of a composite foot-bridge that is subject to spatial deformations during the proof loading process. Barazzetti et al [ 26 ] presents the development and implementation of three image-based methods used to detect and measure the displacements of a vast number of points in the case of laboratory testing on construction materials.…”

3D Correspondence and Point Projection Method for Structures Deformation Analysis

“…Several challenges arise from the point cloud deformation analysis that remains unsolved despite the increasing number of developed methods to detect and quantify displacement and deformation [3], [4]. Besides, many applications can benefit from morphological surface data [5], [6]. For instance, erosion, sedimentation, and other environmental factors may reshape structures and create risks to people as well as to the environment [7], [8].…”

Nondestructive Testing of the Miter Gates Using Various Measurement Methods

“…In the case of less accessible places, where traditional solutions prove to be inefficient, the approach specified in [35] can be employed, where researchers use appropriate software and measuring instrumentation, namely, a laser scanner. These devices are widely used for structure diagnostic examination, as specified in works [36][37][38][39][40].…”