Abstract
The structural performance of concrete structures reinforced using glass-fiber-reinforced-polymer (GFRP) rebars is sometime compromised by debonding failure. For better analyzing the GFRP bar-concrete bond behavior, this study presents two damage-based approaches for assessing the bond damage evolution. One is the secant modulus-based model and other is exponential damage model. Using the exponential damage approach, a simplified analytical model based on only one curve fitting parameter was developed to predict the bond stress-slip relationship. Then, a 3D finite element (FE) model was developed and both proposed damage-based approaches were implemented, to simulate the GFRP bond behavior. The FE model considers the nonlinear behavior of the concrete and the GFRP bar-concrete interface. The analytical and numerical predictions of the GFRP bar-concrete bond behavior are validated by comparing with the relevant results of an experimental program focused on quasi-static pullout tests. At the end, a parametric study was carried out to numerically assess the influence of some critical parameters on the bond behavior.
| Original language | English |
|---|---|
| Pages (from-to) | 102-116 |
| Number of pages | 15 |
| Journal | Construction and Building Materials |
| Volume | 153 |
| Early online date | 17 Jul 2017 |
| DOIs | |
| Publication status | Published - 30 Oct 2017 |
| Externally published | Yes |
Keywords
- Analytical approach
- Bond behavior
- Concrete
- Damage model
- GFRP bar
- Numerical simulation