Time-dependent reliability analysis of RC beams shear and flexural strengthened with CFRP subjected to harsh environmental deteriorations

Firouzi, Afshin; Taki, Amirmasoud; Mohammadzadeh, Saeed

doi:10.1016/j.engstruct.2019.109326

Cited by 17 publications

(3 citation statements)

References 54 publications

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“…Soltanian et al [34] and Firouz et al [31], [32] applied a closed-form solution proposed by Firouzi et al [98] to compute the first passage probability (up-crossing) modeling the steel corrosion as a nonstationary Gaussian process.…”

Section: Stochastic Modeling Approachesmentioning

confidence: 99%

Probabilistic assessment of corroded concrete structures – systematic literature review

Moreira,

Bittencourt,

Carvalho

et al. 2024

Rev. IBRACON Estrut. Mater.

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The evaluation of service conditions of concrete structures has still been carried out through implicit knowledge based on the expertise and knowledge of inspectors, who classify structures based on subjective criteria. The main degradation mechanism of reinforced and prestressed concrete structures is the corrosion of steel reinforcements, with expressive maintenance and repair costs. The phenomenon of corrosion in concrete structures has a complex behavior and presents several uncertainties, and deterministic analyzes can produce very conservative responses, which can unnecessarily increase maintenance costs, thus justifying probabilistic approaches. This article then presents a systematic literature review of articles that address the evaluation of concrete structures under reinforcement corrosion using a probabilistic approach. In this regard, 94 journal articles obtained through an appropriate review protocol were reviewed. Thus, the summary of the main proposed methodologies was carried out, as well as the identification of research gaps on the subject.

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Section: Stochastic Modeling Approachesmentioning

confidence: 99%

Probabilistic assessment of corroded concrete structures – systematic literature review

Moreira,

Bittencourt,

Carvalho

et al. 2024

Rev. IBRACON Estrut. Mater.

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show abstract

“…There is a large number of existing buildings that have been built in the last century in earthquake-prone areas [ 4 , 5 ], which are exposed to both corrosion effects and the risk of seismic hazards. It will eventually lead to deterioration of the properties of RC structures [ 6 ], such as transformation of the damage mode [ 7 , 8 ], reduction of the bearing capacity [ 9 , 10 ] and a decline in ductility [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Seismic Performance of Non-Uniformly Corroded RC Moment-Resisting Frames

Chen

Jiang

2023

Materials

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To investigate the effect of non-uniform corrosion on the seismic performance of reinforced concrete (RC) frame structures, seven RC frame specimens, including one uncorroded and six corroded frames, were tested under quasi-static loading. The damage modes, force–displacement hysteresis curves and skeleton curves, stiffness degradation, ductility and the energy dissipation capacity of specimens were studied. The influences of the corrosion degree, non-uniform corrosion characteristic value, and axial compression ratio on the seismic performance of the specimens were analyzed. The test results show that non-uniform corrosion of longitudinal bars has a significant effect on the development of seismic damage in RC frames. In comparison with non-corroded RC frames, the loading carrying capacity of corroded frames with non-uniform corrosion characteristics values of 0.18, 0.59, and 0.72 decreased by 8.5%, 14.8%, and 22.3%, the displacement ductility ratios decreased by 6.7%, 8.7%, and 10.0%, and the total cumulative energy dissipation at ultimate displacement values decreased by 24%, 41%, and 54%. For corroded frames with low axial compressive ratios, the loading carrying capacity and energy dissipation capacity rose with the increase in the axial compression ratio.

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“…Semi‐empirical investigations on shear strengthening of RC members with CFRP are relatively limited and, to a certain degree, controversial . This is a research problem that is far from being solved and which demands further investigation .…”

Section: Introductionmentioning

confidence: 99%

Life cycle reliability assessment of reinforced concrete beams shear‐strengthened with carbon fiber reinforced polymer strips in accordance with fib bulletin 14

Taki

Firouzi

Mohammadzadeh

2018

Structural Concrete

Self Cite

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The results of time‐variant reliability analysis of shear‐strengthened reinforced concrete (RC) beams with externally bonded fiber‐reinforced polymer (FRP) are presented with an emphasis on the effects of environmental harshness and effective design parameters. The effects of chloride‐induced pitting corrosion and FRP degradation are considered using Monte Carlo simulation to assess the influence of environmental deterioration on the fib 2001 limit states instead of applying design reduction factors. For the defined worked example, the proposed method specifies the remaining lifetime of the strengthened beam by considering a reasonable value for the target reliability index. With regard to the reliability index profiles, it is shown that chloride‐induced pitting corrosion has a greater effect on the shear capacity of strengthened beams than the degradation of the FRP. It was found that the FRP reinforcement ratio has a considerable effect on the governing failure mode; hence, it is important to calibrate the proposed safety verifications of fib bulletin 14 using sufficient experimental data for the relevant random variables in a reliability‐based context.

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Time-dependent reliability analysis of RC beams shear and flexural strengthened with CFRP subjected to harsh environmental deteriorations

Cited by 17 publications

References 54 publications

Probabilistic assessment of corroded concrete structures – systematic literature review

Probabilistic assessment of corroded concrete structures – systematic literature review

Experimental Investigation on Seismic Performance of Non-Uniformly Corroded RC Moment-Resisting Frames

Life cycle reliability assessment of reinforced concrete beams shear‐strengthened with carbon fiber reinforced polymer strips in accordance with fib bulletin 14

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