Relationship between the shear capacity and the flexural cracking load of FRP reinforced concrete beams

Alam, Shah; Hussein, Amgad

doi:10.1016/j.conbuildmat.2017.08.006

Cited by 30 publications

(9 citation statements)

References 14 publications

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“…In existing works on PCBs with external FRP tendons, steel rebars were usually provided. The performance of conventional RCBs with FRP rebars instead of steel ones has been extensively studied [22][23][24][25][26][27][28][29][30]. However, the findings obtained from the study of RCBs with FRP/steel rebars may not be valid for PCBs with external FRP tendons as the latter is a different structural system from the former due to external prestressing.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Using FRP and Steel Rebars in Simply Supported Prestressed Concrete Beams with External FRP Tendons

Pang

Lou

2020

Polymers

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This study aimed at examining the feasibility of using fiber-reinforced polymer (FRP) rebars instead of steel ones in prestressed concrete beams (PCBs) with external FRP tendons. By applying an experimentally validated program, numerical tests were performed on simply supported PCBs, with investigated variables including rebars’ type and area. Three types of rebars were considered, i.e., carbon, glass FRPs (CFRP, GFRP), and reinforcing steel. The ratio of tensile rebars ranged from 0.22% to 2.16%. The results indicated that the beams with CFRP rebars exhibited better crack mode and higher ultimate load than the beams with GFRP or steel rebars. GFRP rebars led to considerably higher ultimate deflection and tendon stress increment than steel rebars. In addition, several models for calculating the ultimate stress in unbonded tendons were assessed. An analytical model was also proposed to predict the tendon stress at ultimate and flexural strength in externally PCBs with steel and FRP rebars. The model predictions agreed well with the numerical results.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Using FRP and Steel Rebars in Simply Supported Prestressed Concrete Beams with External FRP Tendons

Pang

Lou

2020

Polymers

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“…A connection between the cracking load that makes a beam crack at the center of the shear length and the shear capacity of the beam was affirmed in view of the test consequences of 29 beams by Alamo and Hussein in 2017 [19]. All examples were strengthened the longitudinal way just and tried as basically upheld the conditions exposed to four-point bending.…”

Section: Literature Reviewmentioning

confidence: 92%

Optimal Method for Identification of Cracks in Different Beams using Fuzzy with Elephant Based Neural Network

Pitchaiah*,

Rao

2019

IJITEE

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Failure of Structures i.e., beams can be avoided by identifying the damage in the structure at its beginning and proper retrofitting. Recently, the researchers created a structure to recognize crack damage using a cracked beam component model that originates from the fracture mechanics and local flexibility rules. The present work exhibits the analysis of cracked beam with a machine learning model to assess the stiffness of the structure. Here Fuzzy Optimal Neural Network (FONN) is considered, in addition, the stiffness reduction technique, especially concerning thick beams, is featured with a survey of other crack models. The extricated model data are utilized to conversely recognize the cracks with the cracked beam component model through a model updating technique. The optimal Neural Network based stiffness computation utilizes a global searching procedure using Adaptive Elephant Herding Optimization (AEHO) to identify the number of cracks in various beams. From the proposed model, the attained results are compared with the existing research work, and other optimization and machine learning models.

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“…Therefore, a careful assessment on the replacement of steel bars with FRPs in RC elements is essential. A great number of works have been conducted to evaluate the flexural ductility [9,10], deflection [11,12], cracking [13,14] and shear behavior [15] of simply supported FRP RC beams.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Two-Span Continuous CFRP RC Beams

Pang

Shi

et al. 2021

Materials

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This paper investigates the feasibility of replacing steel bars with carbon-fiber-reinforced polymer (CFRP) bars in continuous reinforced concrete (RC) beams. A numerical model is introduced. Model predictions are compared with the experimental results that are available in the literature. A comprehensive numerical investigation is then performed on two-span CFRP/steel RC beams with ρb2 = 0.61–3.03% and ρb1/ρb2 = 1.5, where ρb1 and ρb2 are tensile bar ratios (ratios of tensile bar area to effective cross-sectional area of beams) over positive and negative moment regions, respectively. The study shows that replacing steel bars with CFRP bars greatly improves the crack mode at a low bar ratio. The ultimate load of CFRP RC beams is 89% higher at ρb2 = 0.61% but 7.2% lower at ρb2 = 3.03% than that of steel RC beams. In addition, CFRP RC beams exhibit around 13% greater ultimate deflection compared to steel RC beams. The difference of moment redistribution between CFRP and steel RC beams diminishes as ρb2 increases. ACI 318-19 appears to be conservative, and it leads to more accurate predictions of moment redistribution in CFRP RC beams than that in steel RC beams.

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Relationship between the shear capacity and the flexural cracking load of FRP reinforced concrete beams

Cited by 30 publications

References 14 publications

Numerical Study of Using FRP and Steel Rebars in Simply Supported Prestressed Concrete Beams with External FRP Tendons

Numerical Study of Using FRP and Steel Rebars in Simply Supported Prestressed Concrete Beams with External FRP Tendons

Optimal Method for Identification of Cracks in Different Beams using Fuzzy with Elephant Based Neural Network

Flexural Behavior of Two-Span Continuous CFRP RC Beams

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