Optical fiber sensors implementation for monitoring the early-age behavior of full-scale Timber-Concrete Composite slabs

Teguedy, Mohamed Cheikh; Joly-Lapalice, Catherine; Sorelli, Luca

doi:10.1016/j.conbuildmat.2019.07.294

Cited by 14 publications

(6 citation statements)

References 37 publications

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“…Teguedy et al [ 89 ] sustained that 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. As such, the authors decided to deploy BOTDA DOFS inside two 900 × 75 × 8500 mm TCC slabs in order to continuously monitor (during 30 days) their short-term behavior, i.e., the early-age temperature/strain variation in the fresh concrete and in the CLT slab.…”

Section: Laboratory Experimental Applicationsmentioning

confidence: 99%

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Bado

Casas

2021

Sensors

239

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The present work is a comprehensive collection of recently published research articles on Structural Health Monitoring (SHM) campaigns performed by means of Distributed Optical Fiber Sensors (DOFS). The latter are cutting-edge strain, temperature and vibration monitoring tools with a large potential pool, namely their minimal intrusiveness, accuracy, ease of deployment and more. Its most state-of-the-art feature, though, is the ability to perform measurements with very small spatial resolutions (as small as 0.63 mm). This review article intends to introduce, inform and advise the readers on various DOFS deployment methodologies for the assessment of the residual ability of a structure to continue serving its intended purpose. By collecting in a single place these recent efforts, advancements and findings, the authors intend to contribute to the goal of collective growth towards an efficient SHM. The current work is structured in a manner that allows for the single consultation of any specific DOFS application field, i.e., laboratory experimentation, the built environment (bridges, buildings, roads, etc.), geotechnical constructions, tunnels, pipelines and wind turbines. Beforehand, a brief section was constructed around the recent progress on the study of the strain transfer mechanisms occurring in the multi-layered sensing system inherent to any DOFS deployment (different kinds of fiber claddings, coatings and bonding adhesives). Finally, a section is also dedicated to ideas and concepts for those novel DOFS applications which may very well represent the future of SHM.

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Section: Laboratory Experimental Applicationsmentioning

confidence: 99%

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Bado

Casas

2021

Sensors

239

View full text Add to dashboard Cite

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“…In general, the precast concrete slab has been stacked in the construction site for about one month, the shrinkage has been almost completed, and there will be no obvious shrinkage in the later stage. However, the cast-in-place concrete in the upper part will shrink, and the shrinkage is constrained by the precast slabs below, resulting in tensile stress [ 18 , 19 , 20 , 21 ]. When the tensile stress exceeds the tensile strength, cracks will be produced in the deck [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of MgO Expansive Agent and Steel Fiber on Crack Resistance of a Bridge Deck

Jiang

Deng

et al. 2020

Materials

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To prevent cracks caused by shrinkage of the deck of the Xiaoqing River Bridge, MgO concrete (MC) and steel fiber reinforced MgO concrete (SMC) were used. The deformation and strength of the deck were measured in the field, the resistance to chloride penetration of the concrete was measured in the laboratory, and the pore structure of the concrete was analyzed by a mercury intrusion porosimeter (MIP). The results showed that the expansion caused by the hydration of MgO could suppress the shrinkage of the bridge deck, and the deformation of the deck changed from −88.3 × 10−6 to 24.9 × 10−6, effectively preventing shrinkage cracks. At the same time, due to the restriction of the expansion of MgO by the steel bars, the expansion of the bridge deck in the later stage gradually stabilized, and no harmful expansion was produced. When steel fiber and MgO were used at the same time, the three-dimensional distribution of steel fiber further limited the expansion of MgO. The hydration expansion of MgO in confined space reduced the porosity of concrete, optimized the pore structure, and improved the strength and durability of concrete. The research on the performance of concrete in the in-situ test section showed that MgO and steel fiber were safe for the bridge deck, which not only solved the problem of shrinkage cracking of the bridge deck but also further improved the mechanical properties of the bridge deck.

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“…The use of timber-concrete composite (TCC), a combination of timber and concrete, can address these problems. In TCC slabs, the timber part can endure the tensile force, but the concrete portion resists the compressive force and endures the bending moment (Teguedy et al 2019). This structure is a promising and feasible solution that can compete with steel and reinforced concrete structures in some applications.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, it improves the ease of bonding a CLT floor with pillars, walls, or beams in the field. Therefore, with regard to the CCC manufacture method, between pouring concrete over a CLT floor structure in the field (wet construction method) or pre-fabricating CCC in a factory, the former is predominant (Kanócz and Bajzecerová 2015;Bajzecerová 2017;Thilén 2017;Jiang and Crocetti 2019;Mudie et al 2019;Teguedy et al 2019;Fu et al 2020). When CCC is manufactured through the wet construction method, the CLT plays the subgrade role of concrete.…”

Section: Introductionmentioning

confidence: 99%

Variations of moisture content in manufacturing CLT-concrete composite slab using wet construction method

Song

Baek

Lee

et al. 2020

BioRes

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Construction of eco-friendly high-rise buildings using cross-laminated timber (CLT)-concrete composite (CCC) slabs is increasing. CLT and concrete, which are major component materials of the CCC slab, are significantly affected by moisture. In particular, the moisture content of concrete in the production process affects the quality of both materials. In this study, the effects of the wet construction method on CLT and concrete component materials are examined by monitoring the behavior of the CCC slab during curing time (28 d) and by evaluating the quality of the concrete and CLT after curing. When manufacturing the CCC using the wet construction method, moisture penetration from the concrete into the CLT during the curing time is suppressed by the shear bonding between the concrete and the CLT when an adhesive is used. This minimizes the effect of the moisture on both component materials, consequently yielding uniform compressive strength to the concrete after curing and preventing the deterioration of the CLT’s delamination performance. Therefore, the shear bonding method using an adhesive is expected to minimize the quality deterioration observed in concrete and CLT after curing.

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Optical fiber sensors implementation for monitoring the early-age behavior of full-scale Timber-Concrete Composite slabs

Cited by 14 publications

References 37 publications

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Effects of MgO Expansive Agent and Steel Fiber on Crack Resistance of a Bridge Deck

Variations of moisture content in manufacturing CLT-concrete composite slab using wet construction method

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