## 3 Analyze Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **Station** & **IO (\%)** & **LS (\%)** & **CP (\%)** & **C (\%)** \\ \hline  & & & & **3-story** & \\ \hline Old & 4615 & 0.87 & 88.26 & 4.35 & 6.52 \\ New & 4615 & 2.17 & 90.87 & 5.22 & 1.74 \\ Old & 4611 & 6.52 & 91.74 & 1.30 & 0.43 \\ New & 4611 & 8.26 & 88.26 & 3.04 & 0.43 \\ \hline  & & & **4-story** & & \\ \hline Old & 4615 & 5.22 & 74.78 & 8.26 & 11.74 \\ New & 4615 & 0.43 & 92.61 & 4.35 & 2.61 \\ Old & 4611 & 20.87 & 75.65 & 2.17 & 1.30 \\ New & 4611 & 10.00 & 88.26 & 1.74 & 0.00 \\ \hline  & & & **5-story** & & \\ \hline Old & 4615 & 0.87 & 73.48 & 11.74 & 13.91 \\ New & 4615 & 2.17 & 82.17 & 9.13 & 6.52 \\ Old & 4611 & 6.52 & 85.65 & 7.39 & 0.43 \\ New & 4611 & 14.78 & 79.13 & 5.65 & 0.43 \\ \hline  & & & **6-story** & & \\ \hline Old & 4615 & 2.61 & 66.96 & 9.57 & 20.87 \\ New & 4615 & 2.17 & 90.87 & 4.78 & 2.17 \\ Old & 4611 & 13.91 & 79.57 & 5.22 & 1.30 \\ New & 4611 & 15.65 & 83.91 & 0.43 & 0.00 \\ \hline  & & & **7-story** & & \\ \hline Old & 4615 & 0.43 & 58.70 & 12.61 & 28.26 \\ New & 4615 & 3.91 & 86.52 & 8.26 & 1.30 \\ Old & 4611 & 9.57 & 77.39 & 6.96 & 6.09 \\ New & 4611 & 19.13 & 80.87 & 0.00 & 0.00 \\ \hline  & & & **8-story** & & \\ \hline Old & 4615 & 0.00 & 62.61 & 15.65 & 21.74 \\ New & 4615 & 0.87 & 78.70 & 12.61 & 7.83 \\ Old & 4611 & 7.83 & 83.91 & 5.65 & 2.61 \\ New & 4611 & 9.13 & 87.39 & 3.04 & 0.43 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Evaluated performance levels of investigated structures (provided separately according to stations and story numbers). Displacement values exceeding this threshold will result in increased damage levels. In the TEC-1975 buildings and at station 4615 the thresholds of these limits are 0.75% for immediate occupancy (IO), 1.75% for Life Safety (LS), 2.5% for Collapse Prevention (CP), and 3.5% for total collapse (C). Although these limits show similar values for station 4615 in the case of new buildings, the new buildings demonstrate superior performance compared to older buildings. Even when subjected to larger deformations (\(\Delta/\mathrm{H}\)), they exhibit lower probabilities of damage and higher levels of durability. In contrast, older buildings reach higher probabilities of damage more rapidly, particularly at lower deformation levels. This highlights a significant improvement in the seismic performance of newer structures. Figure 16 compares the performance levels of old and new buildings for the 4611 station, with older buildings represented on the left and newer buildings on the right. In both graphs, probability distributions are presented based on various performance levels along (\(\Delta/\mathrm{H}\)) and probability. For older buildings, the probability of damage at the immediate occupancy (IO) level rapidly reaches 100% at very small \(\Delta/\mathrm{H}\) values (0.2-0.3%). In contrast, new buildings achieve this probability at larger \(\Delta/\mathrm{H}\) values. At the Life Safety (LS) level, older buildings reach 100% probability at smaller deformation levels, whereas new buildings can withstand greater deformations before reaching this threshold. At the Collapse Prevention (CP) level, older buildings reach a 100% probability of exceedance at approximately 1% of \(\Delta/\mathrm{H}\), whereas newer buildings reach this threshold at a higher drift ratio of around 1.5% of \(\Delta/\mathrm{H}\). At the collapse (C) level, older buildings exhibit a higher probability of collapse at lower drift demands, while newer buildings demonstrate greater deformation capacity, with drift ratios exceeding 2% of \(\Delta/\mathrm{H}\). In summary, new buildings demonstrate significantly greater resistance to both small and large deformations compared to older buildings, clearly illustrating the effectiveness of the updated building regulations in enhancing earthquake safety. Previous studies such as ref. [25], as well as the current study, indicate that the destructiveness of earthquakes increases in regions closer to the earthquake's focal point.