DBPapers
DOI: 10.5593/SGEM2016/B22/S10.102

ACCURACY IMPROVEMENT OF THE PRESTRESSED CONCRETE STRUCTURES PRECISE GEOMETRY ASSESSMENT BY USE OF BUBBLE MICRO-SAMPLING ALGORITHM

K. Nagrodzka-Godycka, J. Szulwic, P.Ziolkowski
Thursday 8 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-59-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book2 Vol. 2, 799-806 pp

ABSTRACT
Prestressed concrete structures are well-known technology for an long period, but
nevertheless, this very technology is a leading solution, currently used in construction
industry. Prestressed concrete structures have a huge advantage over conventional
methods because it uses the properties of concrete in a very efficient way. The main
idea behind this technology is to introduce into the cross-section of the structure, the
internal forces which are opposed to external loads effects. Authors have proposed a
method to improve the accuracy of the geometry measurement in prestressed concrete
structures using Terrestrial Laser Scanning (TLS). The method raised by the authors is
based on Spheres Translation Method, which was developed to study geometry
deformation of concrete elements subjected to failure. The new solution, prepared by
the authors, enhanced Spheres Translation Method with the generation of additional
points in the cloud using a Monte Carlo simulation. Monte Carlo simulation used in
point cloud generation gives a better estimation of the marker position which leads to a
better motion tracking for the geometry of the object being scanned. Geometry
assessment of prestressed reinforced concrete beam has been performed by use of TLS.
Prestressed reinforced concrete beam has been subjected to failure and scanned by
Terrestrial Laser Scanner. Obtained data has been post-processed in dedicated software.
Failure test was carried out in a Regional Laboratory of Civil Engineering by Concrete
Structures Department at the Gdansk University of Technology, as a part of research
focused on optical methods development for the diagnosis of concrete structures.

Keywords: terrestrial laser scanning, concrete structure, concrete elements diagnostic,
teledetection, remote sensing