The bond-behaviour of CFRP-to-concrete bonded joints under fatigue loading: A damage accumulation model. (19th May 2023)

• Record Type: Journal Article
• Authors: Zhou, Hao; Zhang, S.S.; Fernando, Dilum; Huang, Tianli
• Is Part Of: Engineering fracture mechanics. Volume 284(2023)
• Publication Date: 2023-05-19
• Subjects: CFRP strengthening -- Bond behaviour -- Fatigue loading -- Damage accumulation model; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2023.109272
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: A new bond-slip model CFRP-to-concrete bonded interface under fatigue loading is proposed. Models for damage accumulation rate was proposed based on existing experimental data for CFRP-to-concrete bonded joints. The model verified against existing experimental data of CFRP-to-concrete bonded joints. Abstract: This paper presents a theoretical study aimed at predicting the behaviour of carbon fibre reinforced polymer-to-concrete bonded joints under fatigue-cyclic loading. A model considering the plastic deformations of the interface, the damage, and the damage accumulation due to fatigue-cyclic loading is proposed. The damage accumulation model is calibrated through the experimental bond-slip relation. Then, a numerical algorithm is formulated to simulate the fatigue bond behaviour using the calibrated damage accumulation model. Numerical simulation was found to provide conservative predictions for fatigue life, which was attributed to the neglect of beneficial effects from the compression stress state near the loaded end in the single-shear pull-off test.