In this study, the size effect of the nominal interfacial strength between concrete and fiber reinforced polymer (FRP) is investigated by integrating fracture tests and computational simulations. Three-point bending fracture tests are performed with geometrically similar specimens to demonstrate the size effect, and to measure fracture parameters for mode-I. Based on the measured fracture parameters, the crack-growth behavior is predicted using the finite-element-based cohesive zone model. Computational results predict accurately the experimental results of the load versus crack mouth opening displacement (CMOD) curves. Furthermore, both the computational and experimental results illustrate that the nominal interfacial strength decreases with increases in the specimen size, i.e., the size effect of the interfacial fracture. Because of the size effect, fracture parameters, such as the fracture energy, should be measured and evaluated to predict the interfacial fracture between concrete and FRP.
Bibliographical noteFunding Information:
This research was supported by the National Research Foundation of Korea funded by the Ministry of Science , ICT & Future Planning (grant number: NRF-2015R1C1A1A02037663 ), and by the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry and Energy (grant number: 20174030201480 ). The information presented in this paper represents the sole opinion of the authors, and does not necessarily reflect the views of the sponsoring agency. Finally, the authors thank the anonymous reviewers for constructive and thorough revision of the work.
All Science Journal Classification (ASJC) codes
- Building and Construction
- Materials Science(all)