Experimental investigation on blast load resistance of reinforced concrete slabs retrofitted with epoxy resin impregnated glass fiber textiles

Draganić, Hrvoje; Gazić, Goran; Lukić, Sanja; Jeleč, Mario

doi:10.1016/j.compstruct.2021.114349

Cited by 12 publications

(3 citation statements)

References 20 publications

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“…In traditional materials performance evaluation, experimental testing has been an indispensable means; however, the time-consuming and costly nature of experiments has posed challenges for researchers [ 26 , 27 , 28 ]. The complexity of experiments and sample preparation requirements limits the speed and range of testing, especially for composite materials that need to consider multiple load conditions in predicting long-term performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation Integrated with Machine Learning (ML) for the Prediction Strategy of DP590/CFRP Composite Laminates

Hu,

Wei,

Wang

et al. 2024

Polymers

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This study unveils a machine learning (ML)-assisted framework designed to optimize the stacking sequence and orientation of carbon fiber-reinforced polymer (CFRP)/metal composite laminates, aiming to enhance their mechanical properties under quasi-static loading conditions. This work pioneers the expansion of initial datasets for ML analysis in the field by uniquely integrating the experimental results with finite element simulations. Nine ML models, including XGBoost and gradient boosting, were assessed for their precision in predicting tensile and bending strengths. The findings reveal that the XGBoost and gradient boosting models excel in tensile strength prediction due to their low error rates and high interpretability. In contrast, the decision trees, K-nearest neighbors (KNN), and random forest models show the highest accuracy in bending strength predictions. Tree-based models demonstrated exceptional performance across various metrics, notably for CFRP/DP590 laminates. Additionally, this study investigates the impact of layup sequences on mechanical properties, employing an innovative combination of ML, numerical, and experimental approaches. The novelty of this study lies in the first-time application of these ML models to the performance optimization of CFRP/metal composites and in providing a novel perspective through the comprehensive integration of experimental, numerical, and ML methods for composite material design and performance prediction.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation Integrated with Machine Learning (ML) for the Prediction Strategy of DP590/CFRP Composite Laminates

Hu,

Wei,

Wang

et al. 2024

Polymers

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“…The tensile strength of fiber-reinforced plastic (FRP) composites is several times higher than that of ordinary steel bars, and it also has good corrosion resistance and can be processed into various shapes according to the actual engineering needs [ 5 , 6 ]. Carbon fiber composite materials and glass fiber composite materials are the most widely used to restrain concrete columns, beams and plates and repair damaged concrete structures, which have achieved remarkable results [ 7 , 8 , 9 , 10 ]. However, these synthetic fibers also have some disadvantages, such as high price and non-recyclability, which make them neither economic nor conducive to environmental protection and sustainable development [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Axial Compression Behavior of Concrete Short Columns Confined by Flax/Glass Fiber Hybrid-Reinforced Epoxy Resin Composites

2022

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In this study, we aimed to explore the effect of concrete short columns confined by flax/glass fiber hybrid-reinforced epoxy resin (FFRP/GFRP) composites. Taking the same fiber hybrid ratio and different paving orders as parameters, analysis of the axial compressive mechanical properties of eight groups of FFRP/GFRP composite-confined concrete short columns, including one group of flax fiber-reinforced epoxy resin (FFRP) composite-confined concrete short columns and one group of unconstrained concrete short column, was conducted. The effects of different layering sequences on failure modes, load–displacement curves, energy dissipation ductility and the stress–strain relationship of hybrid composite-confined concrete short columns were analyzed. The results show that the axial compression failure modes of FFRP/GFRP composite-confined concrete short columns with the same hybrid ratio and different paving sequences were basically the same, and the CC-H6 group was the most prominent. The ultimate bearing capacity and axial deflection were 91.05% and 11.49% higher than those of the control group (CC-FFRP), and the energy dissipation coefficient was also the largest, at 9.79. The failure trend of the stress–strain curve of the confined concrete short column specimens was basically the same, and the stress and axial strain of the members were increased by 247.9~292.5% and 486.7~701.0%, respectively.

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“…Longitudinally retrofit CFRP anchored by transverse wraps and mechanical anchors improved the performance of precast concrete arch segments at Z≈0.48 m/kg1/3 in a study reported by Zhao et al (2021). Externally bonded FRP sheets are not effective retrofit for mitigation of contact explosives, which often result in perforation of concrete and large fragmentation velocities (Draganić et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Blast retrofit of one-way reinforced concrete members using externally bonded FRP and FRP anchorage

Jacques

Saatçioğlu

2022

International Journal of Protective Structures

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This paper presents the results of nine as-built and carbon fiber reinforced polymer (CFRP) retrofitted reinforced concrete panels subjected to simulated blast loading using a pneumatically operated shock tube. The objective of the study was to characterize the blast response of CFRP retrofitted reinforced concrete panels, with and without supplemental mechanical anchorage applied to the CFRP. The results indicate that retrofitting can significantly increase the strength and stiffness of reinforced concrete flexure members and greatly enhance the displacement time-history response over non-retrofitted members. Debonding of the externally bonded CFRP was the failure mode for all retrofitted members. FRP anchors, designed to prevent or delay debonding failures through mechanical end-anchorage, were found to substantially enhance the performance of panels experiencing critical diagonal crack debonding. However, the FRP anchors were found to have no substantial effect on retrofit performance for the case plate-end interfacial debonding failures. In addition, the displacement time-histories for as-built and FRP retrofitted panel obtained through detail single degree of freedom analysis were found correlate well with those obtained experimentally. Finally, a discussion on the practical considerations of using externally bonded FRP retrofits to resist blast loads and recommendations for protective design are presented.

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Experimental investigation on blast load resistance of reinforced concrete slabs retrofitted with epoxy resin impregnated glass fiber textiles

Cited by 12 publications

References 20 publications

Experimental and Numerical Investigation Integrated with Machine Learning (ML) for the Prediction Strategy of DP590/CFRP Composite Laminates

Experimental and Numerical Investigation Integrated with Machine Learning (ML) for the Prediction Strategy of DP590/CFRP Composite Laminates

Study on Axial Compression Behavior of Concrete Short Columns Confined by Flax/Glass Fiber Hybrid-Reinforced Epoxy Resin Composites

Blast retrofit of one-way reinforced concrete members using externally bonded FRP and FRP anchorage

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