Abstract
This paper proposes the use of terrestrial laser scanning (TLS) measurements together with finite element method (FEM) numerical modeling to assess the current technical condition. The main aim of the paper was to evaluate the effect of point cloud size reduction on the quality of the geometric model and the ability to represent the corrosion level in assessing its load-carrying capacity. In this study, a standard scanning was performed on a historical object and a point cloud of a selected corroded element was generated. In order to further process the data, gradual reductions were made in the number of points from which meshes representing the geometry of the selected beam were created. Inaccuracy analyses of the meshes generated on the reduced point clouds were performed. Numerical analysis was then conducted for the selected mesh generated from the reduced point cloud. The results identified the locations of maximum stresses. The presented analysis showed that by developing the presented measurement and computational technique, laser scanning can be used to determine the degree of corrosion of hard-to-reach steel elements.
Highlights
Modern remote sensing is oriented at remote acquisition, processing and interpretation of qualitative information about objects, and focused on the effects and processes occurring on their surfaces
The fields of influence were equal in magnitude
The study resulted in measurements of the actual thickness of the individual sections of the analyzed beam
Summary
Modern remote sensing is oriented at remote acquisition, processing and interpretation of qualitative information about objects, and focused on the effects and processes occurring on their surfaces. The process of developing geometric models of new designed structures is widely described in the literature [3], and the first attempts to automatically reproduce the geometry of a building in virtual form took place as early as 1992 using information and communications technology (ICT) tools [4]. Geometric models based on remote sensing data were developed primarily for administrative purposes, spatial analysis of land surfaces and promotion of individuals or entire regions [5]. The rapid development of BIM technology has meant that threedimensional models have become the basis for design, cost analysis, management and operation of buildings. In the case of newly designed objects, 3D modeling takes place already at the design stage, but in the case of existing objects, it is necessary to obtain applicable data that allow for accurate representation of the geometry of the objects
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