| Specimens | Mean inserting force/kN | Peak force/kN | Combined plateau force/kN | MP ratio | Integral displacement/mm | Integral value/J | Absorbing energy levels/J·mm-1 |
|---|---|---|---|---|---|---|---|
| B | - | 5.1575 | 2.0717 | 2.4895 | 8.5 | 19.6096 | 2.3070 |
| B2 | - | 3.9026 | 1.5469 | 2.5229 | 18.5 | 34.1574 | 1.8463 |
| B+B | 0.7692 | 5.4195 | 3.3583 | 1.6137 | 18.5 | 43.8296 | 2.3692 |
| B+B+B | 0.6534 | 3.2721 | 3.2614 | 1.0033 | 28.5 | 61.3045 | 2.1510 |