Health monitoring of timber beams retrofitted with carbon fiber composites via the acoustic emission technique

Rescalvo, Francisco J.; Suárez, Elisabet; Valverde-Palacios, Ignacio; Zaragoza, Juan Manuel Santiago; Gallego, Antolino

doi:10.1016/j.compstruct.2018.08.068

Cited by 39 publications

(15 citation statements)

References 21 publications

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“…Comparing the carbon ber-reinforced timber beam, an increase in its carrying capacity is likely to be produced which proved the good behavior of a U-shaped member with ber-reinforced plastic as well [46][47][48].…”

Section: Finite Element Analysismentioning

confidence: 93%

Numerical Analysis for U‐Shaped Thin‐Walled Structure Reinforced Timber Beam Based on Thin‐Layer Beam Theory

Liu¹,

Li³

et al. 2019

Advances in Civil Engineering

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This paper presents a theoretical model, taking into account the shear deformation subjected to the influence of U-shaped member by geometric parameters as flange height based on thin-layer beam theory, to analyze the structural bending behavior of U-shaped member reinforced timber composite beams, and the feasible design forms of U-section have been pointed out. The algorithm for this composite beam is the most practical and effective method to meet the accurate solution. The formulas for the common forms of U-section are presented. It aims to develop a rational engineering approach. The proposed model has been validated by comparing the results obtained in the present analysis with experimental results and finite element analysis. Furthermore, the results suggested that the value of flange height can be one-fifth the beam height based on the present analysis by comparison of two types of beams. And it is shown that the model provided here correlates consistently and satisfactorily with a wide range of timber beams reinforced by a thin-walled structure such as steel or aluminum alloy sheet bonded to their tension faces.

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Section: Finite Element Analysismentioning

confidence: 93%

Numerical Analysis for U‐Shaped Thin‐Walled Structure Reinforced Timber Beam Based on Thin‐Layer Beam Theory

Liu¹,

Li³

et al. 2019

Advances in Civil Engineering

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“…There are several studies using carbon fibers as reinforcement in structural timber (Micelli et al 2005, Biscaia et al 2017, Rescalvo et al 2018a, Rescalvo et al 2018b, with emphasis on its use in engineered products, and it should be noted that much of these studies has been developed in several countries, in which wood species are naturally different and adhesives as well.…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber-reinforced polymers as a tensile reinforcement of the Pinus elliotti and Manilkara huberi wood species

Bravo

Branco

Chahud

et al. 2020

Maderas, Cienc. tecnol.

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In wood structures, the elements subjected to bending stresses, such as the beams, present a fracture initiated in the tensile region, and under these conditions, the use of laminated composite materials is presented as an alternative solution in the form of repair or reinforcement. This research aimed to evaluate the influence of the use of carbon fibers laminated composites in tensile reinforcement in the direction parallel to grain of Pinus elliotti and Manilkara huberi wood species. The Viapol two-component epoxy adhesive was used in the lamination and fixation of the unidirectional carbon fiber in the wood species. Ten specimens with no defects (reference) and 10 specimens were prepared for each crack length (25 and 50mm) with and without the reinforcement (60mm × 50mm) by the laminated composite. The tensile tests were performed in accordance with the requirements of the Brazilian standard ABNT NBR 7190 (1997). From the results of the statistical analysis, the use of the carbon fiber composite was able to restore the tensile strength of the cracked samples (partial or total) in relation to samples without defects, demonstrating the potential of the laminates in carbon fibers as an alternative solution in repair for both wood species.

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“…Moreover, some of these authors [37,39] applied acoustic emission technology (AET) to study the effects of crack initiation and growth of wood materials in the drying process. Rescalvo et al [40] investigated the application of acoustic emission using multi-resonant sensors and considered that this method has a good application prospect for health monitoring of retrofitted wood elements in the real world. In addition, Reiterer et al [33] used AET to investigate the fracture properties of softwood and hardwood materials under open mode loading and proposed combining AET with microscopic observations of fracture surfaces to study the shearing fracture behavior of ageing wood.…”

Section: Introductionmentioning

confidence: 99%

The Song Dynasty Shipwreck Monitoring and Analysis Using Acoustic Emission Technique

Zhao

et al. 2019

Forests

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The monitoring of acoustic emission (AE) has allowed tracing of the damage in wooden cultural objects exposed to variations in ambient relative humidity (RH). A year-long on-site AE monitoring of the Song Dynasty shipwreck confirmed the usefulness of the technique in tracing climate-induced damage in wood. New coupling material is tested to make it conform to the conservation rules which is non-corrosive to monitoring objects and a reversible operation. As sensitive parameter of wood damage caused by variations RH, the accumulated ringing counting tends to increase with the increase of daily fluctuation of RH (DFRH). In addition, the damage of wooden cultural objects during shrinkage is stronger than that during swelling. The relationship between the probability of AE activity and the daily DFRH is established and it is determined that the daily variation of RH for long-term protection of the Song Dynasty shipwreck should be controlled within 4%, and an early warning will be given if it exceeds 10%.

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Health monitoring of timber beams retrofitted with carbon fiber composites via the acoustic emission technique

Cited by 39 publications

References 21 publications

Numerical Analysis for U‐Shaped Thin‐Walled Structure Reinforced Timber Beam Based on Thin‐Layer Beam Theory

Numerical Analysis for U‐Shaped Thin‐Walled Structure Reinforced Timber Beam Based on Thin‐Layer Beam Theory

Carbon fiber-reinforced polymers as a tensile reinforcement of the Pinus elliotti and Manilkara huberi wood species

The Song Dynasty Shipwreck Monitoring and Analysis Using Acoustic Emission Technique

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