Table 2 Effective bond length specified by various FRP guides.
From: A State-of-the-Art Review on Debonding Failures of FRP Laminates Externally Adhered to Concrete
Code | Years | Equation | Reference (Origin) |
|---|---|---|---|
ACI 440.2R-08 (USA) | 2008 | \( L_{e} = \frac{23300}{{(nE_{f} t_{f} )^{0.58} }} \) | Maeda et al. (1997); \( L_{e} = e^{{6.134 - 0.58\ln (E_{f} t_{f} )}} \) |
ISIS CSA S806-02 (Canada) | 2002 | \( L_{e} = \frac{25350}{{(E_{f} t_{f} )^{0.58} }} \) | Maeda et al. (1997); \( L_{e} = e^{{6.134 - 0.58\ln (E_{f} t_{f} )}} \) |
FIB B14—Appendix A1 (Europe) | 2001 | \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{c_{2} f_{ctm} }}}_{{}} ,c_{2} = 2 \) | Neubauer and Rostasy (1997); \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{2f_{ctm} }}}_{{}} \) |
FIB B14—Appendix A2 (Europe) | 2001 | \( L_{e} = c_{2} \sqrt {\frac{{E_{f} t_{f} }}{{f_{ctm} }}}_{{}} ,c_{2} = 1.44 \) | Neubauer and Rostasy (1997); \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{2f_{ctm} }}}_{{}} \) |
CS TR55 (UK) | 2004 | \( L_{e} = 0.7\sqrt {\frac{{E_{f} t_{f} }}{{f_{ctm} }}}_{{}} \) | Neubauer and Rostasy (1997); \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{2f_{ctm} }}}_{{}} \) |
CNR-DT 200/04 (Italy) | 2005 | \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{2f_{ctm} }}}_{{}} \) | FIB-B14 Apx-A1; \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{c_{2} f_{ctm} }}}_{{}} c_{2} = 2 \) |
Eurocode 8-3 (Europe) | 2004 | \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{4f_{ctm} }}}_{{}} \) | – |
CIDAR (Australia) | 2006 | \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{\sqrt {f_{c}^{\prime } } }}} \) | Chen and Teng (2001); \( L_{e} = \sqrt {\frac{{E_{f} t_{f} }}{{\sqrt {f_{c}^{\prime } } }}} \) |
– | 2009 | \( L_{e} = 0.012t_{f} \left( {\frac{{E_{f} }}{{\sqrt {f_{c}^{\prime } } }}} \right) \) | Ben Ouezdou et al. (2009); \( L_{e} = 0.012t_{f} \left( {\frac{{E_{f} }}{{\sqrt {f_{c}^{\prime } } }}} \right) \) |
– | 2009 | \( L_{e} = \frac{{\varepsilon_{f} E_{f} t_{f} }}{{k\sqrt {f_{c}^{\prime } } }} \) | Bakay et al. (2009); \( L_{e} = \frac{{\varepsilon_{f} E_{f} t_{f} }}{{k\sqrt {f_{c}^{\prime } } }} \) |