## 2 Experimental Database
### Data Collection  
To comprehensively investigate the factors influencing the moment redistribution and make the proposed models more applicable, 63 test datasets were gathered from the literature [34; 35; 6; 36; 37; 38; 3; 3; 3; 7] for expanding the database, as listed in Table 5. This experimental information included design details, material properties, and the degree of the moment redistribution determined by the internal force of the experimental specimens. It should be noted that these datasets were selected randomly and there was no inclusion of any factitious choice. In total, 111 datasets were obtained to construct the artificial neural network (ANN) and support vector regression (SVR) models. According to the previous studies and existing models [1; 2; 3; 4; 5; 6; 7; 8], the neutral axis depth factor (\(c\)/\(d\)), the ratio of the tensile reinforcement ratio over the critical negative moment regions to the tensile reinforcement ratio over the positive moment regions (\(\rho_{\text{s}1}/\rho_{\text{s}2}\)), the yield strength of the reinforcement (\(f_{\text{y}}\)), the concrete compressive strength (\(f_{\text{c}}\)'), the slenderness ratio (\(l\)/\(h\)), the effective depth of the section (\(h_{0}\)), the stirrup ratio (\(\omega_{\text{w}}\)) and the loading form were selected as the main influential parameters for the moment redistribution. Table 6 presents the range and distribution of the parameters in the database. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Specimens** & \(\mathbf{M_{\text{elast}}}\) (KN\(\cdot\)m) & \(\mathbf{M_{\text{red}}}\) (KN\(\cdot\)m) & \(\mathbf{\beta}\) (\%) & \multicolumn{2}{c}{**Specimens**} & \multicolumn{1}{c}{\(\mathbf{M_{\text{elast}}}\) (KN\(\cdot\)m)} & \(\mathbf{M_{\text{red}}}\) (KN\(\cdot\)m) & \(\mathbf{\beta}\) (\%) \\ \hline L-A-7 & 137.24 & 91.16 & 33.58 & KL-A-4(E) & 160.55 & 84.37 & 47.45 \\ L-A-8 & 122.46 & 87.78 & 28.32 & KL-A-4(M) & 206.19 & 153.10 & 25.75 \\ L-A-9 & 60.86 & 33.13 & 45.57 & KL-A-5(E) & 140.14 & 55.04 & 60.73 \\ L-A-10 & 142.12 & 91.56 & 35.57 & KL-A-5(M) & 228.79 & 159.87 & 30.13 \\ L-A-11 & 124.48 & 89.59 & 28.03 & KL-A-6(E) & 126.08 & 75.45 & 40.16 \\ L-A-12 & 115.36 & 84.75 & 26.53 & KL-A-6(M) & 235.89 & 190.73 & 19.14 \\ L-B-1 & 63.94 & 32.82 & 48.65 & KL-B-1(E) & 79.81 & 40.75 & 48.94 \\ L-B-2 & 95.06 & 52.86 & 44.39 & KL-B-1(M) & 147.00 & 110.20 & 25.03 \\ L-B-3 & 116.01 & 75.85 & 34.61 & KL-B-2(E) & 114.62 & 67.64 & 40.98 \\ L-B-4 & 102.36 & 68.93 & 32.67 & KL-B-2(M) & 181.09 & 139.00 & 23.24 \\ L-B-5 & 50.59 & 27.32 & 45.99 & KL-B-3(E) & 115.17 & 53.57 & 53.49 \\ L-B-6 & 107.48 & 68.15 & 36.60 & KL-B-3(M) & 190.43 & 140.17 & 26.39 \\ L-B-7 & 128.80 & 87.85 & 31.79 & KL-B-4(E) & 132.61 & 72.39 & 45.41 \\ L-B-8 & 136.79 & 95.00 & 30.55 & KL-B-4(M) & 206.27 & 151.13 & 26.73 \\ L-B-9 & 78.18 & 42.40 & 45.76 & KL-B-5(E) & 126.53 & 49.92 & 60.54 \\ L-B-10 & 110.15 & 70.92 & 35.61 & KL-B-5(M) & 200.19 & 146.91 & 26.61 \\ L-B-11 & 136.79 & 96.44 & 29.50 & KL-B-6(E) & 137.60 & 89.67 & 34.83 \\ L-B-12 & 124.79 & 85.26 & 31.68 & KL-B-6(M) & 225.61 & 189.98 & 15.79 \\ \hline \hline \end{tabular} Note: The letters E and M in the “specimens No.”, respectively, indicate the end-support and mid-support of the frame beams.  
\end{table} 
Table 4: \(Cont.\)