Work

Finite Element analysis and experimental study of static performance of multi‐ CFRP tendon composite anchorage system

Year: 2024

Type: article

Abstract: A novel composite anchorage with dispersed arrangement of carbon fiber‐reinforced polymer (CFRP) tendons was proposed. The bonding length and constraint ratio of the dispersed‐tendon composite anchorage were determined by numerical simulation. Six groups of multi‐CFRP tendon composite anchorage systems (MTCAS) were tested to investigate their static performance. The axial force dispersion coefficient cv and relative slip ratio coefficient δ were proposed to evaluate the static performance of the MTCAS with variables, including pre‐tension load, the inner inclination angle of the sleeve and the modified bonding medium. Results demonstrated that increasing the bonding length and restraint ratio of steel sleeve could improve the stress state of tendon in the anchorage. The anchorage with a bonding length of 280 mm and a constraint ratio of the sleeve of 0.90 can reliably anchor multiple CFRP tendons arranged in a dispersed arrangement. An inner inclination angle of 3.1° of the sleeve can be adopted on the premise that strength utilization ratio is guaranteed and anchorage diameter meets the requirements. An adequate pre‐tension load can reduce the slips of tendons, and the recommended pre‐tension load value should not exceed 0.7 Fptk. The 0.25% basalt fiber‐modified epoxy resin anchorage obtained the highest strength utilization ratio. Highlights A novel composite anchorage with dispersed carbon fiber‐reinforced polymer tendons was designed. New mechanical parameters evaluating anchorage performance were proposed. Basalt fiber (BF)‐modified epoxy resin (ER) can improve anchoring performance. The 0.25% BF‐modified ER anchorage obtained the highest strength utilization ratio. Pre‐tension load should not exceed 0.7 times the theoretical tensile load.

Source: Polymer Composites

DOI: 10.1002/pc.28918

Authors: Xue Li, Kuihua Mei, Shiyu Sun, Yuanzhi Wang, Wenke Jia

Institutions: Chang'an University, Zhejiang Water Conservancy and Hydropower Survey and Design Institute

Language: English

Topic: Structural Behavior of Reinforced Concrete

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: bronze

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China