Flexural Strengthening and Rehabilitation of Reinforced Concrete Beam Using BFRP Composites: Finite Element Approach

Abstract

Basalt fiber-reinforced polymer (BFRP) is adopted widely in recent years in many countries to rehabilitate or strengthen structural elements such as reinforced concrete (RC) beams because it is cheap and it has stellar mechanical performance. By activating the finite element (FE) simulation, the present research submits an extensive study on the strengthening and rehabilitation of damaged full-scale RC beams due to corrosions in the main reinforcement caused by BFRP sheets. Different parameters were taken into consideration such as corrosion grade, BFRP wrapping schemes, and the number of layers. The flexural performance of the models that build up as the control model and the damaged and the repaired methodologies by BFRP that are adopted and tested by others under the effects of four-point static loadings were also underwent examination. The full interaction at BFRP-concrete interface and the full bonding between sheets presupposed were investigated for all models. The numerical analysis findings were compared with the experimental measurements and found to be in good agreement. The current numerical analysis proved that the ultimate load rised by 14.8% in spite of 20% corrosion in the flexural steel rebar under eight layers of BFRP composite and bottom wrapping mode. In addition, under all strategies of wrapping schemes, the findings also indicated that the deflection ductility index noticeably reduced for RC beams with BFRP composites compared to the control beam. Finally, all the results of midspan deflection, crack patterns, and strain response of the composite system were analysed and discussed briefly.

Investigation of the Performance of Rc Beams Reinforced With FRP and Ecc Materials

“…In a corrosive envi-ronment, the bearing capacity of an FRP-reinforced beam is also significantly improved. In the case of steel corrosion, the ultimate load of an FRP-reinforced beam was 14.8% higher than that of the unreinforced beam (Kadhim et al, 2019). The reason for this may be that the FRP plays an important role in resisting the load after the reinforcement yields (Kara et al, 2015).…”

Experimental Study of Large-scale RC Beams Shear-Strengthened with Basalt FRP Sheets

“…Because the RC beams in the resistance to shear are complex, therefore many researchers have focused on studying the behavior of RC beams in the shear zone [10][11][12]. Also from the useful and new properties of basalt BFRP, many researches have focused on the use of this type of FRP in the strengthening operations, whether in the shear zone [13][14][15] or in the flexural zone [16][17][18] or both together [19] with different forms of BFRP, whether sheets or bars [20,21]. However, these experimental and numerical studies have not considered all the parameters that influence the shear behavior of RC beams strengthening with FRP sheets; such as the beam width, the effect of scale (large-scale dimensions), new types of FRP sheets (such as basalt FRP (BFRP)), and the applied strengthening configuration (Ujacketing).…”

Experimental and Numerical Investigation on Carbon Fiber‐Reinforced Polymer‐Strengthened Concrete Beam after High‐Temperature Action of Asphalt Paving Construction

“…In the previous research on CFRP reinforcement theory, many researches have been conducted on the numerical simulation analysis of the debonding of CFRP plate-reinforced concrete structures [10][11][12][13][14][15][16]. Tao and Chen [10] simulated the bonding behavior of single-shear specimens, and a simplified finite element model was proposed to simulate the bonding behavior of the interfacial debonding process.…”

“…Daud et al [11] studied the postfatigue behavior of CFRP-concrete interface in ABAQUS, and a cohesive surface model was adopted in the single-shear test model. Kadhim et al [12] studied the interface of the damaged concrete beam with FEA. Mesoscale finite element and meshless finite element have been applied to the analysis of the CFRP-concrete interface debonding issue.…”