Specimens | Concrete strength (MPa) | No. of holes | Diameter of hole (mm) | Ultimate load, Pu (kN) | Relative slip, δu (mm) | Characteristic values | Ductility, δuk/δu | |
Load, Prk (kN) | Relative slip, δuk (mm) | |||||||
C180-P12 C180-P12-D30x1 C180-P12-D30x2 C180-P12-D30x3 C180-P12-D50x1 C180-P12-D50x2 C180-P12-D50x3 | 180 | ? 1 2 3 1 2 3 | ? 30 30 30 50 50 50 | 730.0 1011.0 962.3 963.0 1032.3 1051.8 1135.0 | 8.34 6.57 9.34 2.29 5.05 7.76 13.46 | 657.0 909.9 866.1 866.7 929.1 946.6 1021.5 | 14.38 14.93 13.22 6.18 7.38 10.70 19.03 | 1.78 2.27 1.42 2.70 1.46 1.37 1.41 |
C80-P12 C80-P12-D30x1 C80-P12-D30x2 C80-P12-D30x3 C80-P12-D50x1 C80-P12-D50x2 C80-P12-D50x3 | 80 | ? 1 2 3 1 2 3 | ? 30 30 30 50 50 50 | 416.6 368.8 474.9 575.3 535.0 613.7 754.7 | 0.84 1.76 1.04 1.32 0.61 3.68 1.73 | 374.9 331.9 427.4 517.8 481.5 552.3 679.2 | 2.47 3.61 1.59 1.48 1.82 6.62 2.57 | 2.95 2.05 1.53 1.12 2.98 1.80 1.30 |