Shear strength of FRP reinforced deep concrete beams without stirrups: Test database and a critical shear crack-based model

Mukhtar, Faisal M.; Deifalla, Ahmed Farouk

doi:10.1016/j.compstruct.2022.116636

Cited by 12 publications

(1 citation statement)

References 42 publications

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“…The improvements in the shear strength of RC beams stiffened by FRP were explored previously (Guadagnini et al, 2006; Mukhtar and Deifalla, 2023). The experimental results, presented by Khalifa and Nanni (2002), indicated that the contribution of externally bonded CFRP to the shear capacity was significant.…”

Section: Introductionmentioning

confidence: 99%

Experimental and finite element analysis of reinforced concrete multi-cell box girders retrofitted with carbon fiber reinforced polymer strips under torsion

Allawi,

Chai,

Majeed

et al. 2023

Advances in Structural Engineering

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This study expands the state of the art in studies that assess torsional retrofit of reinforced concrete (RC) multi-cell box girders with carbon fiber reinforced polymer (CFRP) strips. The torsional behavior of non-damaged and pre-damaged RC multi-cell box girder specimens externally retrofitted by CFRP strips was investigated through a series of laboratory experiments. It was found that retrofitting the pre-damaged specimens with CFRP strips increased the ultimate torsional capacity by more than 50% as compared to the un-damaged specimens subjected to equivalent retrofitting. This indicated that the retrofit has been less effective for the girder specimen that did not develop distortion beforehand as a result of pre-loading. From experimental observations, when the girder specimen was cracked and the transverse steel reinforcement bars started straining, the CFRP strips started to work more effectively and contributed together with the transverse steel reinforcement to resist torsion load. Additionally, Finite Element (FE) simulations were developed using Abaqus to model the torsional behavior of the retrofitted girders, the results of which were validated with the experimental data. With the numerical model, the effect of concrete compressive strength, transverse reinforcement spacing, and CFRP strip spacing were examined. The effectiveness of the CFRP strips in enhancing the torsional strength of the girder was found to increase with increasing the spacing between the transverse reinforcement.

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Section: Introductionmentioning

confidence: 99%