Interfacial debonding between concrete and fiber reinforced polymer (FRP) is investigated through integrating experiments and computations. An experimental program is designed to evaluate interfacial fracture parameters of mode-I through cutting and bonding specimens with an FRP sheet. The evaluated fracture parameters, i.e. the fracture energy and the bonding strength, are confirmed by predicting FRP debonding failure with the cohesive zone modeling approach. In the cohesive zone model, a traction-separation relation for FRP debonding is proposed with a shape index while providing various initial descending slopes. Computational results of the cohesive zone model agree well with three-point bending test results for both FRP debonding and plain concrete fracture. Furthermore, both experimental and computational results demonstrate that the fracture energy and the cohesive strength are essential fracture parameters for the prediction of FRP debonding behavior.
Bibliographical noteFunding Information:
Dr. Park acknowledges support from the National Research Foundation (NRF) of Korea through Grant No. 2011-0013393 , and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) through Grant No. 20121620100040 . The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agency.
All Science Journal Classification (ASJC) codes
- Building and Construction
- Materials Science(all)