The Bond between FRP and Concrete:
Mechanism, Durability and Enhancing Approach
主講人: Baolin Wan教授
地 點: 廣州大學（大學城校區）文清606
The performance of reinforced concrete flexural members strengthened with externally bonded fiber reinforced polymer (FRP) composite materials depends on the bond between FRP and concrete. Moisture, as one of the most common environmental factors, is very important for durability of the bond between FRP and concrete. In this seminar, three experimental setups for evaluating the FRP/concrete bond are introduced. They are modified double cantilever beam (MDCB), single shear pullout and beam tests. Numerical analyses were performed using the experimentally-obtained bond-slip relations to model the shear pullout and beam tests. The numerical analyses show that the boundary conditions of the concrete block at the loaded end play an important role in the resulting bond-slip relationship and stress state of the FRP/concrete interface in the pullout tests. The MDCB test was used to evaluate the durability of FRP/concrete bond in moist environments. Based on the experimental results and a moisture diffusion model, a bond mechanism based deterioration model of bond interfacial fracture energy was proposed for FRP-concrete bond joints in moist environments. Finally, a novel and simple approach which can enhance the interfacial bond behavior between FRP and concrete was proposed. Experimental and analytical work related to this enhancing approach will be discussed.
Dr. Baolin Wan is an Associate Professor of Structural Engineering in the Department of Civil, Construction and Environmental Engineering at Marquette University. He obtained his Bachelor of Engineering in Civil Engineering from Tsinghua University in 1996, Master of Science in 1999 and Ph.D. in 2002 from University of South Carolina. Dr. Wan is a Council Member of the International Institute for FRP in Construction (IIFC, 2012-2018), and an Associate Member of Committee 440 – FRP of American Concrete Institute (ACI). He received the best paper award in the Third International Conference on FRP Composites in Civil Engineering (CICE2006). His research interests include numerical and experimental modeling of repaired and retrofitted structures, and use of FRP in structural members.