Durability Investigation on CFRP Strengthened Cementitious Materials in Cold Region

Li, Wei; Li, Wenchao; Wang, Xu; Ji, Yongcheng

doi:10.3390/polym14112190

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…40,41 For the traction separation law, most studies use a two-line constitutive model, that is, a linear elastic segment before reaching the ultimate strength and a linearly decreasing segment of stiffness after reaching the ultimate strength. 42 Damage initiation is related to adhesion. When the bond reaches the ultimate strength, ABAQUS software provides an initial damage criterion suitable for composite lamination simulation.…”

Section: Model Establishmentmentioning

confidence: 99%

Research on coupled erosion damage model of FRP bonded concrete beams subjected to Lemaitre assumption

Zou,

2023

Polymer Composites

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In cold regions, the coupling of freeze–thaw cycles and sulfate frequently impairs the performance of FRP‐bonded concrete, resulting in a shortened service life. Carbon fiber polymer (CFRP) and glass fiber polymer (GFRP) are used to paste pre‐cracked concrete beams in the experiment, and three unfavorable environments are created: freeze–thaw cycle, 10% sulfate solution erosion, and coupling erosion. This paper investigates the durability performance of FRP bonded beams using microscopic, mechanical and dynamic modulus of elasticity tests, as well as post‐erosion damage values and finite element modeling. After 400 h of coupled erosion, sulphate erosion and freeze–thaw cyclic erosion environments, the strength of the CFRP bonded beams was reduced by 66.3%, 14.6% and 42.0% and the GFRP bonded beams by 67%, 21.9% and 52.3% respectively. The results show that single sulphate attack does not cause significant damage to the beams, but it can exacerbate the damage caused by freeze–thaw cycles. A coupled damage model based on the Lemaitre strain equivalence assumption predicted the actual coupled damage of the specimens. The finite element model can accurately predict the damage and strength of the bond surface under loading.Highlights The durability performance of CFRP and GFRP adhered pre‐cracked concrete beams Microscopic, mechanical, and dynamic elastic modulus tests are used Freeze–thaw erosion environment in 10% mass fraction sulphate solution Coupled damage models for coupled salt and freeze–thaw cycles are developed FRP‐reinforced pre‐cracked beams subjected to erosion are simulated with ABAQUS

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Section: Model Establishmentmentioning

confidence: 99%

Research on coupled erosion damage model of FRP bonded concrete beams subjected to Lemaitre assumption

Zou,

2023

Polymer Composites

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“…To improve the frost resistance of concrete, fiber and other additives are often used [71] (see Table 5). Fibrous concrete [72][73][74] Good resistance to cracking, permeability and frost…”

Section: Change the Frost Resistance Condition Of Lining Concretementioning

confidence: 99%

Recent Progress in the Cracking Mechanism and Control Measures of Tunnel Lining Cracking under the Freeze–Thaw Cycle

Yuan,

Ma,

Liu

et al. 2023

Sustainability

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With the rapid increase in the scale and number of tunnels in cold regions, the frost damage problems, such as cracking of the lining structure under the action of freeze–thaw cycles are becoming increasingly prominent. This review article collects and sorts out the frost damage phenomena that occur in the lining structure of tunnels in cold regions under the action of freezing and thawing cycles, classifies the frost damage phenomena into structural frost damage and non-structural frost damage, and proposes that the research on the mechanism of lining frost damage and its prevention measures should focus on lining cracking. According to the damage degree of the freeze–thaw cycle to the lining structure and its influence on tunnel operation, the cracking mode and cracking stage of lining are introduced. The analysis focuses on the mechanism of cracking in lining structures subjected to freeze–thaw cycles, considering the external force caused by frost heaving, the alteration of mechanical properties in lining concrete, and the internal changes in the microstructure of the concrete. Additionally, the factors that contribute to the occurrence of lining cracking are summarized. Based on this, corresponding control measures have been organized to provide reference for the development of cracking of the lining structure under the action of freeze–thaw cycle.

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“…CFRP has been widely used in various industries, such as the aviation, aerospace, automotive, and shipbuilding industries, due to their excellent properties, including light weight, high strength, and resistance of corrosion [ 1 , 2 , 3 , 4 ]. However, composite material is often subjected to complex dynamic loading in the application stage, especially in the event of collisions [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain Rate on Tensile Properties of Carbon Fiber-Reinforced Epoxy Laminates with Different Stacking Sequences and Ply Orientations

et al. 2023

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In practical application situations, a carbon fiber-reinforced polymer (CFRP) is often subjected to complex dynamic loadings. The effect of the strain rate on mechanical properties is very important for the CFRP design and product development. In this work, static and dynamic tensile properties of CFRP with different stacking sequences and ply orientations were investigated. The results showed that the tensile strengths of CFRP laminates were sensitive to the strain rate, while Young’s modulus was independent of the strain rate. Moreover, the strain rate effect was related to the stacking sequences and ply orientations. The experimental results showed that the strain rate effects of the cross-ply laminates and quasi-isotropic-ply laminates were lower than that of the unidirectional-ply laminates. Finally, the failure modes of CFRP laminates were investigated. Failure morphology demonstrated that the differences in strain rate effects among cross-ply laminates, quasi-isotropic-ply laminates, and unidirectional-ply laminates were caused by the mismatch between the fiber and the matrix when the strain rate increased.

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Durability Investigation on CFRP Strengthened Cementitious Materials in Cold Region

Cited by 6 publications

References 27 publications

Research on coupled erosion damage model of FRP bonded concrete beams subjected to Lemaitre assumption

Research on coupled erosion damage model of FRP bonded concrete beams subjected to Lemaitre assumption

Recent Progress in the Cracking Mechanism and Control Measures of Tunnel Lining Cracking under the Freeze–Thaw Cycle

Effect of Strain Rate on Tensile Properties of Carbon Fiber-Reinforced Epoxy Laminates with Different Stacking Sequences and Ply Orientations

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