Mechanical characterization of CFRP/steel bond cured and tested at elevated temperature

Chandrathilaka, E.R.K.; Gamage, J.C.P.H.; Fawzia, Sabrina

doi:10.1016/j.compstruct.2018.09.048

Cited by 56 publications

(26 citation statements)

References 13 publications

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“…However, relatively long-time exposure would inevitably change the chemical composition and physical and mechanical properties severely. ermal-induced cracks usually induce material degeneration and further threaten the safety and serviceability of whole structures [5,6]. erefore, extensive experiments have been conducted on the fire responses of concrete after high temperatures [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Xie

Zhang

Yin³

et al. 2019

Advances in Materials Science and Engineering

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Fires are always known for seriously deteriorating concrete in structures, especially for those with certain carbonation due to long-time service. In this paper, 75 prism specimens were prepared and divided into four groups (three carbonated groups and one uncarbonated group). Specimens were tested under different temperatures (20, 300, 400, 500, 600, and 700°C), exposure times (3, 4, and 6 hours), and cooling methods (water and natural cooling). Surface characteristics, weight loss rate, and residual mechanical properties (strength, initial elastic modulus, peak, and ultimate compressive strains) of carbonated concrete specimens after elevated temperatures were investigated and compared with that of the uncarbonated ones. Results show that the weight loss rates of the carbonated concrete specimens are slightly lower than that of the uncarbonated ones and that the cracks are increased with raising of temperatures. Surface colors of carbonated concrete are significantly changed, but they are not sensitive to cooling methods. Surface cracks can be evidently observed on carbonated specimens when temperature reaches 400°C. Residual compressive strength and initial elastic modulus of carbonated concrete after natural cooling are generally larger than those cooled by water. The peak and ultimate compressive strains of both carbonated and uncarbonated concrete specimens increase after heating, but the values of the latter are greater than that of the former. Finally, the constitutive equation to predict the compressive behaviors of carbonated concrete after high temperatures was established and validated by tests.

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Section: Introductionmentioning

confidence: 99%

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Xie

Zhang

Yin³

et al. 2019

Advances in Materials Science and Engineering

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“…On the other hand, when cured at a lower temperature (<10 °C), the bond quality is highly inferior [115]. Hightemperature exposure immediately after the curing of the adhesive is beneficial in terms of post-curing activities [98,116]. However, thereafter, about 50% of Poisson's ratio, elastic modulus and bond strength of the adhesive layers are lost at a temperature 15 °C higher than the T g [116].…”

Section: Temperature Variationmentioning

confidence: 99%

“…Hightemperature exposure immediately after the curing of the adhesive is beneficial in terms of post-curing activities [98,116]. However, thereafter, about 50% of Poisson's ratio, elastic modulus and bond strength of the adhesive layers are lost at a temperature 15 °C higher than the T g [116]. Moreover, accelerated diffusion of moisture and chemicals may occur in a FRPstrengthened system at elevated temperatures [117,118].…”

Section: Temperature Variationmentioning

confidence: 99%

Performances, challenges and opportunities in strengthening reinforced concrete structures by using FRPs – A state-of-the-art review

Siddika

Mamun

Ferdous

et al. 2020

Engineering Failure Analysis

162

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“…This becomes the weakest point of this strengthening method. Long-term environmental exposures lead to the bond strength decrease due to effects of temperature [16][17][18], moisture [19], and ultraviolet (UV) exposure [20]. The bond strength will also be affected by the quality of steel surface treatment produced by the workers who work on it, as their skills are different.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

2020

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This paper presented a non-linear finite element (FE) analysis to investigate the potential of unbonded carbon fiber-reinforced polymers (CFRP) strengthening in improving the axial compression performance of steel members. The FE model was firstly developed and validated against experimental works. Four parameters considered in the parametric study were the number of CFRP layers, CFRP length, slenderness ratio, and elastic modulus of CFRP. It was confirmed that the unbonded CFRP strengthening method is effective at enhancing the load-carrying capacity as well as delaying the overall buckling of the axial steel members. The strength increase is highly affected by the first three parameters. In addition, the method of an equivalent slenderness ratio can be used for strength design.

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Mechanical characterization of CFRP/steel bond cured and tested at elevated temperature

Cited by 56 publications

References 13 publications

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Performances, challenges and opportunities in strengthening reinforced concrete structures by using FRPs – A state-of-the-art review

Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

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