Measurement of Flat Slab Deformations by the Multi-Image Photogrammetry Method

Slovak Journal of Civil Engineering

Marián Marčiš¹  Tomáš Augustín²  Marek Fraštia³ 

[1] Corresponding authorDepartment of Surveying, Faculty of Civil Engineering, Slovak University of Technology, Bratislava, Slovakia;Department of Concrete Structures and Bridges, Faculty of Civil Engineering, Slovak University of Technology, Bratislava, SlovakiaOther articles by this author:;Department of Surveying, Faculty of Civil Engineering, Slovak University of Technology, Bratislava, SlovakiaOther articles by this author:

关键词: Photogrammetry;    Deformation measurement;    Flat slab;    Strain;    Load test.;   

DOI  :  10.1515/sjce-2017-0019

学科分类：建筑学

来源: Slovenska Technicka Univerzita v Bratislave * Stavebna Fakulta

【 摘 要 】

The use of photogrammetry during load tests of building components is a common practise all over the world. It is very effective thanks to its contactless approach, 3D measurement, fast data collection, and partial or full automation of image processing; it can deliver very accurate results. Multi-image convergent photogrammetry supported by artificial coded targets is the most accurate photogrammetric method when the targets are detected in an image with a higher degree of accuracy than a 0.1 pixel. It is possible to achieve an accuracy of 0.03 mm for all the points measured on the object observed if the camera is close enough to the object, and the positions of the camera and the number of shots are precisely planned. This contribution deals with the design of a special hanging frame for a DSLR camera used during the photogrammetric measurement of the deformation of flat concrete slab. The results of the photogrammetric measurements are compared to the results from traditional contact measurement techniques during load tests.

【 授权许可】

Unknown