Abstract:
Reverse engineering is a method of obtaining information about the geometry of an existing object. To obtain such information, among others: 3D laser scanning is used. The result of measurements using this method is a point cloud. The research examined the possibilities of using scanning data to analyze the technical condition of a historical building. Based on the inventoried point cloud, the deflections of beams and ceilings were determined. The course and width of scratches, cracks and defects were determined. It was found that the basic factor increasing the usefulness of the point cloud for various analyzes is its density, which depends on the accuracy of the scan performed. Thanks to a detailed point cloud, a digital three-dimensional model (digital twin) of the existing object was created and analyzed using computer methods. The aim of the presented research was to evaluate the use of reverse engineering to analyze the condition of a historic water tower. Moreover, the real possibilities and advantages of a relatively new measurement method were checked. The thesis was put forward that laser scanning and reverse engineering are effective methods supporting the assessment of the building condition. Based on the available literature and in situ tests, the problem was described and analyzes were carried out to assess the condition of the historic water tower building. Measurements with a 3D laser scanner and a tachymeter were also carried out in the field. Then, the digital model was used to measure the deflection and possible buckling of beams and ceilings on individual floors. The correctness of the formulated method for solving the problem was verified on the basis of tests of sample structural elements. It has been shown that it is possible to directly identify the elevations of the bottom of the ceiling elements and verify whether the existing deflections do not exceed the standard limits. As research has shown, a point cloud resulting from reverse engineering is helpful in assessing the technical condition of a building. Combining classic inspection-based methods with the capabilities of the new measurement method allows for more accurate and broader analyses. Β© 2024 Elsevier Ltd
