## 3 Results and Discussion
### Seismic Performance Analysis for Different Importance Class of the Structure  
One of the other parameters used in the design and evaluation of structures under the effect of earthquakes is the importance class of the structure, which changes depending on the purpose of usage of the structure. This parameter varies especially according to its use after the earthquake and the number of people who will use it. For this purpose, the concept used in seismic design codes is the importance class of the structure, which can take different coefficients for different types of structures. Considering the usability priority of any structure adds meaning to structural analyses. It is an expected result that the sensitivity to be shown in buildings that must be used after earthquakes will be different. \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Soil Class**} & \multirow{2}{*}{
\begin{tabular}{c} **Target** \\ **Displacements (m)** \\ \end{tabular} } & \multicolumn{4}{c}{**Damping Ratio (\%)**} \\ \cline{3-6}  & & **2** & **5** & **7** & **10** \\ \hline \multirow{4}{*}{ZA} & DL & 0.0507 & 0.0424 & 0.0387 & 0.0346 \\ \cline{2-6}  & SD & 0.0650 & 0.0544 & 0.0496 & 0.0444 \\ \cline{2-6}  & NC & 0.1127 & 0.0943 & 0.0861 & 0.0770 \\ \hline \multirow{4}{*}{ZB} & DL & 0.0760 & 0.0636 & 0.0580 & 0.0519 \\ \cline{2-6}  & SD & 0.0975 & 0.0816 & 0.0745 & 0.0666 \\ \cline{2-6}  & NC & 0.1690 & 0.1414 & 0.1291 & 0.1155 \\ \hline \multirow{4}{*}{ZC} & DL & 0.0874 & 0.0731 & 0.0668 & 0.0597 \\ \cline{2-6}  & SD & 0.1121 & 0.0938 & 0.0856 & 0.0766 \\ \cline{2-6}  & NC & 0.1944 & 0.1626 & 0.1485 & 0.1328 \\ \hline \multirow{4}{*}{ZD} & DL & 0.1368 & 0.1145 & 0.1045 & 0.0934 \\ \cline{2-6}  & SD & 0.1755 & 0.1468 & 0.1340 & 0.1199 \\ \cline{1-1} \cline{2-6}  & NC & 0.3042 & 0.2545 & 0.2324 & 0.2078 \\ \hline \end{tabular}
\end{table} 
Table 4: Target displacements for different soil classes and damping ratios. Figure 7: Comparison of target displacements for different soil and damping ratios. In this study, four different importance classes in Eurocode 8 were used, and these are shown in Table 5.  
The comparison of target displacements obtained from numerical analyses in the case where only local soil classes and structural importance class are selected as variables and other structural properties are constant is illustrated in Table 6.  
As in the structural analyses conducted for other variables, the target displacement values increased with the weakening of the local soil properties. The situation is not very different in the usability priority of the structure after the earthquake. The target displacement values naturally increased due to the usage priority. Comparisons are shown in Figure 8 for a better understanding of all the results. \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Soil Class**} & \multirow{2}{*}{
\begin{tabular}{c} **Target** \\ **Displacements (m)** \\ \end{tabular} } & \multicolumn{4}{c}{**Importance Class**} \\ \cline{3-6}  & & **I** & **II** & **III** & **IV** \\ \hline \multirow{3}{*}{ZA} & DL & 0.0339 & 0.0424 & 0.0509 & 0.0593 \\ \cline{2-6}  & SD & 0.0435 & 0.0544 & 0.0653 & 0.0761 \\ \cline{2-6}  & NC & 0.0754 & 0.0943 & 0.1131 & 0.1320 \\ \hline \multirow{3}{*}{ZB} & DL & 0.0509 & 0.0636 & 0.0763 & 0.0890 \\ \cline{2-6}  & SD & 0.0653 & 0.0816 & 0.0979 & 0.1142 \\ \cline{2-6}  & NC & 0.1131 & 0.1414 & 0.1697 & 0.1980 \\ \hline \multirow{3}{*}{ZC} & DL & 0.0585 & 0.0731 & 0.0877 & 0.1024 \\ \cline{2-6}  & SD & 0.0750 & 0.0938 & 0.1126 & 0.1313 \\ \cline{2-6}  & NC & 0.1301 & 0.1626 & 0.1951 & 0.2277 \\ \hline \multirow{3}{*}{ZD} & DL & 0.0916 & 0.1145 & 0.1373 & 0.1602 \\ \cline{2-6}  & SD & 0.1175 & 0.1468 & 0.1762 & 0.2055 \\ \cline{1-1} \cline{2-6}  & NC & 0.2036 & 0.2545 & 0.3054 & 0.3563 \\ \hline \end{tabular}
\end{table} 
Table 6: Target displacements according to different local soil conditions and importance classes of structure.