Impact response of hybrid FRP-steel reinforced concrete slabs

Mousavi, Tohid; Shafei, Erfan

doi:10.1016/j.istruc.2019.02.013

Cited by 22 publications

(9 citation statements)

References 12 publications

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“…The use of conventional steel reinforcement is hindered in such a situation. Fiber-reinforced polymers (FRP) bars offer suitable applications instead of steel reinforcement due to their corrosion resistance [ 12 , 13 , 14 , 15 ]. FRP rebars provide several advantages such as high strength to weight ratio, low density, ease of handling, and corrosion resistance; therefore they have been used as internal reinforcement in concrete structures [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Ensemble Tree-Based Approach towards Flexural Strength Prediction of FRP Reinforced Concrete Beams

et al. 2022

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Due to rise in infrastructure development and demand for seawater and sea sand concrete, fiber-reinforced polymer (FRP) rebars are widely used in the construction industry. Flexural strength is an important component of reinforced concrete structural design. Therefore, this research focuses on estimating the flexural capacity of FRP-reinforced concrete beams using novel artificial intelligence (AI) decision tree (DT) and gradient boosting tree (GBT) approaches. For this purpose, six input parameters, namely the area of bottom flexural reinforcement, depth of the beam, width of the beam, concrete compressive strength, the elastic modulus of FRP rebar, and the tensile strength of rebar at failure, are considered to predict the moment bearing capacity of the beam under bending loads. The models were trained using 60% of the database and were validated first-hand on the remaining 40% database employing the correlation coefficient (R), error indices namely, mean absolute error, root mean square error (MAE, RMSE) and slope of the regression line between observed and predicted results. The developed models were further validated using sensitivity and parametric analysis. Both models revealed comparable performance; however, based on the comparison of the slope of the validation data (0.83 for GBT model against 0.75 for the DT model) and higher R for the validation phase in case of the GBT model in comparison to the DT, the GBT model can be considered more accurate and robust. The sensitivity analysis yielded depth of the beam as the most influential parameter in contributing flexural strength of the beam, followed by the area of flexural reinforcement. The developed GBT model surpasses the existing gene expression programming (GEP) model in terms of accuracy; however, the current American Concrete Institute (ACI) model equations are more reliable than AI models in predicting the flexural strength of FRP-reinforced concrete beams.

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Section: Introductionmentioning

confidence: 99%

Ensemble Tree-Based Approach towards Flexural Strength Prediction of FRP Reinforced Concrete Beams

et al. 2022

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“…Retrofitting is an art of structural modification, which becomes a more cost-effective superior alternative to the traditional techniques. In the field of concrete constructions, the FRP retrofitting method is able to provide improvement of the static and dynamic performance of infrastructures [2][3][4][5]. Mousavi and Shafei [2] investigated the impact resistance of hybrid FRP-steel-reinforced concrete slabs, results of which showed that FRP material reinforcement can minimize the damage level and dissipate the imposed energy.…”

Section: Introductionmentioning

confidence: 99%

“…In the field of concrete constructions, the FRP retrofitting method is able to provide improvement of the static and dynamic performance of infrastructures [2][3][4][5]. Mousavi and Shafei [2] investigated the impact resistance of hybrid FRP-steel-reinforced concrete slabs, results of which showed that FRP material reinforcement can minimize the damage level and dissipate the imposed energy. Abdel-Kader and Fouda [3] experimentally compared the performance between plain concrete and glass fibre-reinforced polymer (GFRP) sheet-strengthened concrete plates in terms of impact resistance under various compressive strengths.…”

Section: Introductionmentioning

confidence: 99%

Renovation Effect of Flax FRP-Reinforced Cracked Concrete Slabs under Impact Loadings

Wang

Chouw

et al. 2021

Materials

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The impact behaviour of flax fibre-reinforced polymer (FFRP) renovated coconut fibre-reinforced concrete (CFRC) slabs was investigated through two series of experiments and theoretical analysis. The first experiment was carried out to find out the effectiveness of FFRP retrofitted method for the partly damaged concrete structure and its performance under impact loadings. The renovation process was applied on the pre-cracked rectangular CFRC slabs of 600 mm × 300 mm × 50 mm with FFRP laminates, before the repeated impact tests. Then, the parameters of these slabs, i.e., impact force history, deflection history and damage pattern, were discussed in detail. Another experiment was conducted on the FFRP-CFRC square slabs with a dimension of 600 mm × 600 mm × 50 mm. Based on test results, the effect of different FFRP configurations was discussed to find out the effective reinforcement method. In addition, the two-degree-of-freedom spring-mass model was applied to predict the impact force. Results demonstrate that FFRP composites have a good potential to be utilised as renovated construction materials under dynamic load conditions.

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“…At present, there are many studies on the impact test and numerical simulation of ordinary reinforced concrete columns [16][17][18][19][20], beams [21][22][23][24][25][26], and walls (plates) [27][28][29][30][31][32][33]. Civil air defense engineering shear walls play an important role in civil air defense engineering structures and are also the main force components under impact loads.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Numerical Analysis on Impact Resistance of Civil Air Defense Engineering Shear Wall

Shi

Zhang

et al. 2021

Advances in Civil Engineering

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In order to study the impact resistance of civil air defense engineering shear wall, the impact resistance of civil air defense engineering shear wall was studied by combining finite element numerical simulation with pendulum impact test. The effects of impact height, pendulum mass, and impact times on the impact resistance of civil air defense engineering shear walls were analyzed. It was shown that when the impact height increased from 0.4 m to 2.5 m, the failure mode of civil air defense engineering shear wall tended to be local impact failure, and the horizontal displacement in the middle of the wall span increased. The concrete crushing occurred in the impact area of the back of the civil air defense engineering shear wall. The increase in the impact height is a negative factor for the impact resistance of the civil air defense engineering shear wall. With the increase of pendulum weight, the number of concrete horizontal cracks in the back of the civil air defense engineering shear wall increased, while the number of vertical cracks decreased, but the impact surface was destroyed. Through multiple impact tests on the civil air defense engineering shear wall, the civil air defense engineering shear wall had accumulated damage. The longitudinally loaded steel on the back reached the ultimate strength, and there are large cracks at the bottom and even collapses. The increase of impact times has a great influence on the impact resistance of the civil air defense engineering shear wall. Through the analysis of the factors affecting the impact resistance of civil air defense engineering shear wall, it provides guidance for civil air defense engineering shear wall to resist impact load.

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Impact response of hybrid FRP-steel reinforced concrete slabs

Cited by 22 publications

References 12 publications

Ensemble Tree-Based Approach towards Flexural Strength Prediction of FRP Reinforced Concrete Beams

Ensemble Tree-Based Approach towards Flexural Strength Prediction of FRP Reinforced Concrete Beams

Renovation Effect of Flax FRP-Reinforced Cracked Concrete Slabs under Impact Loadings

Experimental Study and Numerical Analysis on Impact Resistance of Civil Air Defense Engineering Shear Wall

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