Field Testing of FBG Based Deformation Sensors Embedded in Concrete Bridge Structure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21720%2F18%3A00321582" target="_blank" >RIV/68407700:21720/18:00321582 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5592/CO/CETRA.2018.694" target="_blank" >http://dx.doi.org/10.5592/CO/CETRA.2018.694</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5592/CO/CETRA.2018.694" target="_blank" >10.5592/CO/CETRA.2018.694</a>

Result language

angličtina

Original language name

Field Testing of FBG Based Deformation Sensors Embedded in Concrete Bridge Structure

Original language description

As far as the road network is concerned, bridge and tunnel structures are considered to be its most important and complicated elements. Bridges are completely exposed to environmental impacts; therefore, it is necessary to predict the actual structural health. The prediction can be based on monitoring of mechanical stresses which can be used to determine any resulting deterioration of load bearing structure. The main objective of bridge monitoring during construction phase is an observation of a structural behaviour in individual construction stages, particularly the actual mechanical stresses (or deformations) in critical cross sections. Based on the measured data it is possible to verify the designed parameters or to modify the design in following construction stages (load bearing structure dimensions’ adjustment, prestressing, loading of the bridge suspensions, etc.). After the construction completion, it is possible to observe the traffic intensity as well as deformations due to temperature changes, in addition to mechanical stress monitoring. This paper presents the initial phase of a field test dealing with the utilization of embedded fibre optic sensors (custom design) for monitoring the bridge structure. The load bearing structure of the bridge is pre-stressed continuous beam structure with three individual spans; this structure is replacing the old stone four-arch bridge, which was already in poor technical condition. The sensors are integrated directly into the load bearing elements; two different types of sensors were embedded into the concrete structure. The paper describes sensor design, installation, monitoring of the pre-stressing process and monitoring of stresses in several weeks after putting the bridge into operation. The two different types of Fibre Bragg Grating sensors were tested in laboratory conditions prior bridge installation. Testing is described and results are evaluated in the paper as well.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Road and Rail Infrastructure V, Proceedings of the Conference CETRA 2018

ISBN

978-953-8168-25-3

ISSN

1848-9850

e-ISSN

—

Number of pages

7

Pages from-to

49-55

Publisher name

University of Zagreb

Place of publication

Zagreb

Event location

Zadar

Event date

May 17, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—