Publication :
Optical fiber sensors implementation for monitoring the early-age behavior of full-scale timber-concrete composite slabs

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Date
2019-08-02
Auteurs
Teguedy, Mohamed Cheikh
Joly-Lapalice, Catherine
Direction de publication
Direction de recherche
Titre de la revue
ISSN de la revue
Titre du volume
Éditeur
Elsevier
Projets de recherche
Structures organisationnelles
Numéro de revue
Résumé
The study of the early-age behavior of Timber-Concrete Composite (TCC) structures is of great interest as it provides valuable information for manufacturing specification development, quality control, and optimization of the formwork design. In this study, the results of the continuous monitoring of the short-term behavior of TCC slabs using Brillouin Distributed Optical Fiber Sensors (DOFS) are reported. Two TCC slabs with 8.5 m of length were monitored. The composite elements are constituted of Cross-Laminated Timber (CLT) connected to a High-Performance Concrete (HPC) slab. During a monitoring period of about 30 days, the early-age temperature/strain variation in the fresh concrete and in the CLT slab was measured in great details by DOFS. From the presented results, the significant influence of the curing conditions on the early-age shrinkage was highlighted. It was also observed that creep and the daily hygrometric variations of environment affect considerably the composite action between the timber and the concrete. In addition, it was experimentally demonstrated that such mechanisms generate considerable structural changes in the composite elements even before their entry into service.
Description
Revue
Construction and building materials, Vol. 226, 564-578 (2019)
DOI
10.1016/j.conbuildmat.2019.07.294
URL vers la version publiée
Mots-clés
Timber-Concrete Composite structures , Early-age concrete shrinkage , Hygrothermal deformations , Structural Health Monitoring , Brillouin distributed fiber sensors
Citation
Type de document
article de recherche