Table 1 Main parameters of test specimens.
From: Seismic Performance of Exterior RC Beam–Column Joints Retrofitted using Various Retrofit Solutions
Specimens | \( f^{\prime}_{c} \) (MPa)a | Retrofit properties | Beams | Columns | |||||
|---|---|---|---|---|---|---|---|---|---|
Types | Retrofit materials | Locations | Dimensions b × h (mm × mm) | Top reinforcement (volume ratio) | Bottom reinforcement (volume ratio) | Dimensions b × h (mm × mm) | Longitudinal reinforcement (volume ratio) | ||
J-0 | 20.87 | Control | – | – | 200 × 300 | 3-D22 + 2-D19 (3.5%) | 3-D10 (0.43%) | 300 × 300 | 6-D25 (3.4%) |
J-A | 22.85 | Head re-bars anchoring | 8 head re-bars | Panel zone | |||||
J-CFRP | 20.37 | CFRP wrapping | CFRP sheets (2 layers, 2 sides) + 2 sides CFRP anchors | Panel zone | |||||
J-H | 19.80 | Haunch retrofit solution | Steel haunch elements (beam bottom + anchor bolts | – | |||||
J-SJ1 | 20.14 | Steel jacketing | Steel plates (16 mm, 2 sides) + 2 sides anchor bolts | Panel zone | |||||
J-SJ2 | 20.93 | Steel jacketing | U-shaped steel plates (16 mm, 2 sides) + 2 sides anchor bolts | Panel zone | |||||
J-SJ3 | 18.64 | Steel jacketing | Steel plates (16 mm, 3 sides) + 3 sides anchor bolts | Panel zone | |||||