Research Article

A Stress-Strain Model for Unconfined Concrete in Compression considering the Size Effect

Table 3

Comparisons of normalized root-mean-square error.

Concrete typeAspect ratioStatistical valueResearcher
Markeset and Hillerborg [6]Samani and Attard [7]This study

LWC10.500.450.21
0.350.110.10
20.280.380.27
0.240.170.24
Subtotal0.390.410.24
0.130.290.16

NWC0.5∼1.00.320.240.13
0.120.070.02
2∼3.50.290.220.17
0.160.160.11
4.0∼8.00.240.340.39
0.030.030.05
Subtotal0.290.230.19
0.140.140.12

HWC2.00.290.730.10
0.140.090.01

Total0.320.340.19
0.190.210.13