Experimental Study on Wedge Anchorage Performance of Prestressed BFRP Laminates for Flexural Strengthening of Reinforced Concrete Components

Article Engineering, Civil

Composite-Wedge Anchorage for Fiber-Reinforced Polymer Tendons

Jianzhe Shi et al.

Summary: A novel composite-wedge anchorage is proposed for prestressing FRP tendons. Experimental results demonstrate the effectiveness of the proposed anchorage in terms of tensile capacity, creep behavior, and fatigue life.

JOURNAL OF COMPOSITES FOR CONSTRUCTION (2022)

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Article Chemistry, Physical

Experimental Study on the Durability of Steel Anchors for Prestressed CFRP Laminates under Accelerated Galvanostatic Corrosion

Jun Deng et al.

Summary: This study investigates the durability of corroded anchors for prestressing CFRP laminates and finds that wedge anchors have better performance in terms of prestress retention, anchor efficiency, and resistance to slippage.

MATERIALS (2022)

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Article Engineering, Civil

Experimental study on the flexural behavior of RC beams strengthened with prestressed BFRP laminates

Changyuan Liu et al.

Summary: This study investigates the flexural behavior of RC beams strengthened with prestressed basalt FRP (BFRP) laminates, comparing them to traditional carbon FRP (CFRP) laminates. It was found that BFRP offers a larger failure strain but lower modulus than CFRP, making it a cost-effective and suitable option for strengthening existing beams. Factors such as FRP type, laminate thickness, strengthening method, reinforcement ratio, prestressing level, and adhesive were studied, with BFRP showing better crack control and ductility compared to CFRP under the same conditions. Additionally, a higher prestressing level improved BFRP utilization and the prestressing method effectively lowered the reinforcement ratio, while the bonded system had better crack control and strength utilization than the unbonded system.

ENGINEERING STRUCTURES (2021)

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Article Engineering, Civil

Innovative flexural strengthening of RC beams using self-anchored prestressed CFRP plates: Experimental and numerical investigations

Jincheng Yang et al.

Summary: This paper introduces an innovative method of using prestressed CFRP plates for strengthening RC beams by achieving self-anchorage. Experimental tests showed significant improvements in flexural performance, with a utilization ratio of 81% at debonding. Numerical analyses were conducted to investigate the effect of prestressing levels and CFRP plate stiffness on flexural behavior.

ENGINEERING STRUCTURES (2021)

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Article Materials Science, Composites

Experimental research on hybrid anchorages of prestressed composite strips for structural strengthening

Bartosz Piatek et al.

Summary: The paper discusses the development of hybrid bonded/bolted anchorages of CFRP strips for a novel prestressing system, with thin steel plates clamped using high-strength friction grip (HSFG) bolts and epoxy adhesive to fix the CFRP strips. Tests on full-scale axial tensile specimens showed that the anchorages have an ultimate tensile strength of about 200 kN, sufficient for strengthening purposes, and have been successfully implemented on-site.

JOURNAL OF COMPOSITE MATERIALS (2021)

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Article Engineering, Civil