Experimental Research and Analysis on Fatigue Life of Carbon Fiber Reinforced Polymer (CFRP) Tendons

Song, Shoutan; Zhang, Hua; Duan, Ning; Jiang, Junwei

doi:10.3390/ma12203383

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…In assessing the failure of CFRP and in the fatigue cycle, the tendons rupture point is at the middle portion of the member. It determines that the fatigue life of CFRP tendons shortens as the maximum stress is increased [14].…”

Section: Strength Limit Statementioning

confidence: 99%

Strength, Serviceability, and Anchorage of Fiber-Reinforced Polymer and Carbon Fiber Composite Prestressing Tendons

Lucena,

Carabbacan,

Manggapis

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Carbon fiber reinforced polymer (CFRP) and Carbon Fiber composite cable (CFCC) are common types of prestressing member reinforcement. This paper determines the properties of CFRP and CFCC in terms of strength limit, serviceability, and anchorage, which are the primary considerations in designing tendons. The first method in conducting this review is formulating research questions concerning the innovative materials in prestressing tendons and determining behavior and physical properties. The execution used the three-step procedure to retrieve a publication or journal relevant to prestressed concrete tendons and research databases like Google Scholar and EBSCO. In the consolidation of results, it has been found that CFRP exhibits higher tensile strength than CFCC. The serviceability and performance of both CFRP and CFCC were the same as traditional steel reinforcement used in prestressed beams. In anchorage of CFRP and CFCC, the composite bonding wedge is observed to be 100% efficient since it has the same stress capacity as the CFRP tendon.

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Section: Strength Limit Statementioning

confidence: 99%

Strength, Serviceability, and Anchorage of Fiber-Reinforced Polymer and Carbon Fiber Composite Prestressing Tendons

Lucena,

Carabbacan,

Manggapis

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Xie et al [23] investigated slippage and the variation of bonding interfacial temperature in a bonded anchorage system during the fatigue-loading process, revealing their impact on the ultimate anchoring capacity. Song et al [24] proposed a novel wedge-type anchorage system that could withstand fatigue stress amplitudes from 200 MPa to 800 MPa and maximal stresses from 0.37 to 1.0 fu without slippage or failure in the anchoring section. In general, the anchoring system utilized for a CFRP rod in a fatigue test must ensure that the fatigue damage propagates in the mature mode.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Fatigue Capacity of Bending-Anchored CFRP Cables

Zhu²,

2023

Polymers

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In this study, the variation of fatigue stiffness, fatigue life, and residual strength, as well as the macroscopic damage initiation, expansion, and fracture of CFRP (carbon fiber reinforced polymer) rods in bending-anchored CFRP cable, were investigated experimentally to verify the anchoring performance of the bending anchoring system and evaluate the additional shear effect caused by bending anchoring. Additionally, the acoustic emission technique was used to monitor the progression of critical microscopic damage to CFRP rods in a bending anchoring system, which is closely related to the compression-shear fracture of CFRP rods within the anchor. The experimental results indicate that after the fatigue cycles of two million, the residual strength retention rate of CFRP rod was as high as 95.1% and 76.7% under the stress amplitudes of 500 MPa and 600 MPa, indicating good fatigue resistance. Moreover, the bending-anchored CFRP cable could withstand 2 million cycles of fatigue loading with a maximum stress of 0.4 σult and an amplitude of 500 MPa without obvious fatigue damage. Moreover, under more severe fatigue-loading conditions, it can be found that fiber splitting in CFRP rods in the free section of cable and compression-shear fracture of CFRP rods are the predominant macroscopic damage modes, and the spatial distribution of macroscopic fatigue damage of CFRP rods reveals that the additional shear effect has become the determining factor in the fatigue resistance of the cable. This study demonstrates the good fatigue-bearing capacity of CFRP cable with a bending anchoring system, and the findings can be used for the optimization of the bending anchoring system to further enhance its fatigue resistance, which further promotes the application and development of CFRP cable and bending anchoring system in bridge structures.

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“…Reinforcement with external prestressed steel strands is regarded as an efficient way of strengthening bridges and beams that are deteriorating due to increased overloading and progressive structural aging [1][2][3][4][5]. Miyamoto A.…”

Section: Introductionmentioning

confidence: 99%

“…Wire-breakage or rupturing can result in significant losses to society, making the reinforcement of deteriorating pipes essential. Reinforcement with external prestressed steel strands is regarded as an efficient way of strengthening bridges and beams that are deteriorating due to increased overloading and progressive structural aging [1][2][3][4][5]. Miyamoto A.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study and Application of the Reinforcement of Prestressed Concrete Cylinder Pipes with External Prestressed Steel Strands

et al. 2019

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Prestressed concrete cylinder pipes (PCCPs) can suffer from prestress loss caused by wire-breakage, leading to a reduction in load-carrying capacity or a rupture accident. Reinforcement of PCCPs with external prestressed steel strands is an effective way to enhance a deteriorating pipe’s ability to withstand the design load. One of the principal advantages of this reinforcement is that there is no need to drain the pipeline. A theoretical derivation is performed, and this tentative design method could be used to determine the area of prestressed steel strands and the corresponding center spacing in terms of prestress loss. The prestress losses of strands are refined and the normal stress between the strands and the pipe wall are assumed to be distributed as a trigonometric function instead of uniformly. This derivation configures the prestress of steel strands to meet the requirements of ultimate limit states, serviceability limit states, and quasi-permanent limit states, considering the tensile strength of the concrete core and the mortar coating, respectively. This theory was applied to the reinforcement design of a PCCP with broken wires (with a diameter of 2000 mm), and a prototype test is carried out to verify the effect of the reinforcement. The load-carrying capacity of the deteriorating PCCPs after reinforcement reached that of the original design level. The research presented in this paper could provide technical recommendations for the application of the reinforcement of PCCPs with external prestressed steel strands.

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Experimental Research and Analysis on Fatigue Life of Carbon Fiber Reinforced Polymer (CFRP) Tendons

Cited by 10 publications

References 20 publications

Strength, Serviceability, and Anchorage of Fiber-Reinforced Polymer and Carbon Fiber Composite Prestressing Tendons

Strength, Serviceability, and Anchorage of Fiber-Reinforced Polymer and Carbon Fiber Composite Prestressing Tendons

Experimental Investigation of Fatigue Capacity of Bending-Anchored CFRP Cables

Theoretical Study and Application of the Reinforcement of Prestressed Concrete Cylinder Pipes with External Prestressed Steel Strands

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