Abstract
This paper presents experimental and analytical studies aimed at investigating debonding of hybrid fiber reinforced polymers (FRPs) used to strengthen reinforced concrete (RC) beams. Towards this goal, an existing bending test method for small RC beams is modified to induce debonding failure and is adopted for reinforced concrete beams strengthened with one or two layers of carbon FRP (CFRP) or glass FRP (GFRP). From the experiments, strains on FRPs are measured and used to calculate interfacial stress between the concrete and FRP surfaces. Finite element (FE) models including debonding behavior in cohesive elements are generated to verify experimental results. Further, parametric studies are performed to predict the structural behaviors of RC beams strengthened with three layers of hybrid FRPs.
| Original language | English |
|---|---|
| Pages (from-to) | 248-256 |
| Number of pages | 9 |
| Journal | Composites Part B: Engineering |
| Volume | 45 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2013 |
Bibliographical note
Funding Information:This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2011-0008824).
Keywords
- A. Hybrid
- A. Laminates
- B. Debonding
- C. Analytical modeling
- Interfacial stress