Fatigue behaviour and design of corroded reinforced concrete beams intervened by ICCP-SS

Su, Meini; Wei, Liangliang; Liang, Han-shi; Zhu, Ji-Hua; Ueda, Tamon; Xing, Feng

doi:10.1016/j.compstruct.2020.113295

Cited by 15 publications

(4 citation statements)

References 36 publications

(49 reference statements)

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“…In addition to the externally bonding of FRP plate to cementitious structures for strengthening or retrofitting (Wang et al, 2022), another application is to embed the FRP short/long fibers, bars or textiles inside concrete to form the composite called fiber reinforced cementitious matrix (FRCM) (Michels et al, 2016; Tang et al, 2022). Such FRCP could be adequate composite to act as both structural strengthening (SS) and impressed charge cathodic protection (ICCP) materials for the application of sea-water seas-and concrete (SSC) with steel reinforced bars (Feng et al, 2022; Su et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Dynamic tensile behavior of fiber reinforced materials based on fiber layering modeling

Gong,

Peng,

Wang

et al. 2023

Advances in Structural Engineering

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Among the failure forms of fiber reinforced materials, interface failure caused by fiber debonding is the most common but complex failure mode. This research proposed a fiber layering modeling method based on the different mechanical properties of the outer and inner parts of fiber yarn, then investigated the mechanical behavior of fiber reinforced materials under dynamic loads with different loading speeds. Two pullout models were established, considering the layering feature of fiber caused by the matrix penetration. The simulated results were compared with the existing experimental data to determine reliable parameters values of the fiber-matrix interface. Based on the values, another pullout model and tensile model were built. Distribution and development of stress in the loading process were discussed. Results show that fiber modeling with inner and outer parts, as well as the cohesive property with reliable parameters, could effectively represent the interface characteristics of fiber reinforced materials under dynamic load.

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Section: Introductionmentioning

confidence: 99%

Dynamic tensile behavior of fiber reinforced materials based on fiber layering modeling

Gong,

Peng,

Wang

et al. 2023

Advances in Structural Engineering

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“…In this intervention method, the carbon-fibre meshes embedded in FRCM functions as an anode material for ICCP and as an external strengthening material for SS [ 14 ]. A number of experimental programmes have been carried out to demonstrate the effectiveness of the ICCP-SS dual-intervention system on corroded structural members, including short columns under static loads [ 15 ] and under cyclic loads [ 16 ], simply supported beams [ 17 , 18 ] and continuous beams [ 19 , 20 ] under static loads, as well as simply supported beams [ 21 ] and continuous beams [ 22 , 23 ] under cyclic loads. Specifically, results from research [ 15 ] reveal that the ultimate compressive loads of columns intervened upon by the ICCP-SS technique could be improved by up to 50.4% compared to control columns.…”

Section: Introductionmentioning

confidence: 99%

“…In all of the abovementioned studies, electrochemical signals were measured and compared against standard criteria to ensure the effective protection of reinforcement bars. Except for the static loading condition, Su et al [ 22 ] and Wei [ 24 ] proved the flexural bearing capacity of concrete structures are substantially improved after the application of ICCP-SS for beams subjected to cyclic loads. These experimental programmes proved that the ICCP-SS intervention system can not only effectively prevent steel reinforcement corrosion, but also restore the loading capacities of degraded structural members.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of FRCM-Strengthened Corroded RC Beams under Cathodic Protection

Abdulla

Zhang

2022

Materials

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Fibric reinforced cementitious matrix (FRCM) composites have been used to improve the mechanical performance of reinforced concrete beams subjected to degradation in the past decades. Recently, dual-functional carbon fibres have been explored to provide both structural strengthening to RC beams and cathodic protection to reinforcement bars. This paper investigates the loading responses and structural behaviour of RC beams subjected to different levels of corrosion, protected by impressed current cathodic protection and structurally strengthened by external bonded FRCM. A numerical model is developed for the corroded RC beams under impressed current cathodic protection and structural strengthening by the FRCM composite. Upon validation against experimental results collected from the literature, the finite element model is then used for parametric study. A number of numerical results are generated to analyse the effects of key parameters, including the corrosion rate, degradation level of interfacial bonding properties due to anode acidification, and end anchorage, followed by detailed discussions. It is found that the significance of the corrosion of steel reinforcement bars significantly affects the load-carrying capacity of the beams. Increasing the corrosion rate from 0 to 40% reduces the load-carrying capacity of un-strengthened beams to 45% of the original capacity. Therefore, the cathodic protection provided by the C-FRCM plate is important to the reinforcement bars as it can avoid the cross-section area reduction of reinforcement bars and, thus, the main loading capacities of the beams. In this study, the degradation of the bonding properties at the interface of carbon fibre and the cementitious matrix due to anode acidification during impressed current cathodic protection is also considered. It is found that the bond strength of the C-FRCM plate has a slight effect on the load-carrying capacity of the beam. In addition, the application of end anchorage can significantly enhance both the load-carrying capacity and ductility of the beams. The rates of enhancement, if compared to the beams with no end anchorage, can reach up to 60%.

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“…This improves the fatigue performance of the beam and its dissipative capacity under seismic actions. Furthermore, the presence of thin cracking reduces the rebar exposure to an aggressive environment with respect to wide cracking, which increases the steel durability and fatigue life [ 17 , 18 ]. The experimental evidence showed increases in the strengthened beam fatigue life up to seven times if compared to that of corresponding unstrengthened beams [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Low- and High-Cycle Fatigue Behavior of FRCM Composites

et al. 2021

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This paper describes methods, procedures, and results of cyclic loading tensile tests of a PBO FRCM composite. The main objective of the research is the evaluation of the effect of low- and high-cycle fatigue on the composite tensile properties, namely the tensile strength, ultimate tensile strain, and slope of the stress–strain curve. To this end, low- and high-cycle fatigue tests and post-fatigue tests were performed to study the composite behavior when subjected to cyclic loading and after being subjected to a different number of cycles. The results showed that the mean stress and amplitude of fatigue cycles affect the specimen behavior and mode of failure. In high-cycle fatigue tests, failure occurred due to progressive fiber filaments rupture. In low-cycle fatigue, the stress–strain response and failure mode were similar to those observed in quasi-static tensile tests. The results obtained provide important information on the fatigue behavior of PBO FRCM coupons, showing the need for further studies to better understand the behavior of existing concrete and masonry members strengthened with FRCM composites and subjected to cyclic loading.

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Fatigue behaviour and design of corroded reinforced concrete beams intervened by ICCP-SS

Cited by 15 publications

References 36 publications

Dynamic tensile behavior of fiber reinforced materials based on fiber layering modeling

Dynamic tensile behavior of fiber reinforced materials based on fiber layering modeling

Numerical Investigation of FRCM-Strengthened Corroded RC Beams under Cathodic Protection

Low- and High-Cycle Fatigue Behavior of FRCM Composites

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