New Distributed Fibre Optic 3DSensor with Thermal Self-Compensation System : Design, Research and Field Proof Application Inside Geotechnical Structure

Thanks to the dynamic development of advanced building technologies as well as the growing awareness, experience and responsibilities of engineers, structural health monitoring systems (SHM) are increasingly applied in civil engineering and geotechnical applications. This is also facilitated by the construction law and standard requirements, e.g., the observation method for geotechnical structures described in the Eurocode 7. Still, the most common approach is to apply spot sensors in selected points of the structure to validate theoretical models, numerical simulations and support technical assessments by involving statistic and approximation methods. The main limitation of spot sensing is the inability to detect localized damages such as cracks, fractures, sinkholes or shear planes. Thus, such analysis is subject to considerable uncertainty, especially within geotechnical structures, characterized by random mechanical parameters that change with location, but also over time. Another approach is based on distributed fibre optic sensors (DFOS), which are finding a growing acceptance in laboratory and field projects, overcoming limitations of conventional measurements. The design and applications of new DFOS dedicated for 3D displacement sensing are described hereafter in the article. The novelty of the presented solution lies in several features, including design, application, production technology and materials. This article is focused on the operational rules governing DFOS and proving their effectiveness in laboratory and geotechnical field applications.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:21

Enthalten in:

Sensors (Basel, Switzerland) - 21(2021), 15 vom: 27. Juli

Sprache:

Englisch

Beteiligte Personen:

Bednarski, Łukasz [VerfasserIn]
Sieńko, Rafał [VerfasserIn]
Grygierek, Marcin [VerfasserIn]
Howiacki, Tomasz [VerfasserIn]

Links:

Volltext

Themen:

3DSensor
Composite
Displacements
Distributed fibre optic sensing DFOS
Embankment
Geotechnics
In situ measurements
Journal Article
Laboratory
Settlements
Thermal compensation

Anmerkungen:

Date Revised 13.08.2021

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.3390/s21155089

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM329164341