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Comparison study of precise monitoring techniques applied to engineering specimens tested under dynamic loading

Metheniti, Anna Maria; (2021) Comparison study of precise monitoring techniques applied to engineering specimens tested under dynamic loading. Masters thesis (M.Phil), UCL (University College London). Green open access

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Abstract

Initially, the thesis shows a state of the art for structural health monitoring techniques and procedures. Different types of instrumentations and sensors employed under different requirements, which are presented with the view to monitor a variety of structural issues resulted by numerous conditions. It also presents examples from the literature following the proposed monitoring strategy as a novel pattern. These show how close-range digital photogrammetry and strain gauges have been employed in the past with the view to obtain strain evaluation assessments of the relevant monitored structural elements. Based on three surveys which have been carried out in a historical masonry church in Athens (Greece), the methodology of the thesis is generated with the experimental framework being also formed. Eight experiments have been carried out, five of them at the Advanced Structures Laboratory (CEGE – UCL), one at the Concrete Laboratory (CEGE – UCL) and two of them at the Earthquake and Large Structures Laboratory (EQUALS – University of Bristol). Two scale engineering specimens are employed for the experimental needs, both are scaled down using as a prototype element, the north-eastern wall of the studied church. The five experiments which are carried out in CEGE, are made on small scale masonry specimens, of 1/17th scale and the two experiments in EQUALS are made on large scale masonry specimens, of 1/5th scale. All the seven experiments are dynamically loaded. The only static loaded experiment is carried out at the Concrete Laboratory and it is made on a masonry specimen. Through the comparison of the two monitoring methods, close-range digital photogrammetry (CRDP) and strain gauges (SG), is concluded that both methods can capture a change in strain, on the tested specimens, when a crack is occurring.

Type: Thesis (Masters)
Qualification: M.Phil
Title: Comparison study of precise monitoring techniques applied to engineering specimens tested under dynamic loading
Event: UCL (University College London)
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Copyright © The Author 2021. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
URI: https://discovery.ucl.ac.uk/id/eprint/10133141
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