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. 2024 Jun 25;14:14590. doi: 10.1038/s41598-024-64386-w

Table 9.

Load and resistance factors, the prediction-to-test ratio θ_R distributions, recommended strength reduction factor ϕ.

ACI31817 EC218 CATB Prop.Eqn (WOR) Prop.Eqn (WWR)
Load factor γ
 Dead load γD 1.2 1.35 1.2 1.2** 1.2**
 Live load γL 1.6 1.5 1.6 1.6 1.6
Best-fit distribution θR (Table *) Lognormal Lognormal Lognormal Lognormal Lognormal
 Mean (Table *) 0.699 0.677 1.01 1.003 1.004
 CoV (Table *) 0.372 0.353 0.085 0.207 0.192
 Target reliability β 3.559 3.818 5.29* 3.5** 3.5**
 Evaluated strength reduction factor ϕ for the target reliability index 0.58 0.78 1.0 0.76 0.78

*Target reliability β=5.29 evaluated for strength reduction factor ϕ=1.0.

**Load factors and target reliability β are assumed to be identical to these of ACI318.