## 4 Conclusions  
The article presents the findings of dynamic non-linear analyses performed for two irregular models of a building in response to five different types of earthquakes. The conclusions from the analysis are as follows:  
* The first model consists of RC and masonry walls and the second model consists of just RC walls. The building's dynamic characteristics were examined before the calculations. The calculations focused on the base shear, displacement, and evaluation of the damage caused by the earthquakes. * The study highlights that changes in seismic characteristics can significantly affect a building's dynamic response. * The main contribution of this study is its attempt to consider the effect of different earthquakes with varying magnitudes, PGA and PGV values, and durations of the intense shock phase on the behavior of medium-rise structures. The level of ground velocity (PGV) has the most significant impact on structural damage. The horizontal velocity earthquakes analyzed ranged from 67 to 487.9 mm/s. * The locations of structural damage were identified, and the dynamic resistance of the structure was assessed. It was observed that there is a significant displacement between the highest point of the building's roof and the level of the 6 th floor ceiling. This displacement is caused by the design of that section of the building, which functions as a cantilever. However, the displacement between the ceiling on the top  
Figure 20: Crack width for Turkey earthquake record—station No.3134 for Model No. 2—RC walls. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Type of Excitation** & **Type of Damage** & **Degree of Damage** \\ \hline Turkey earthquake No. 2703—very high PGA values, long duration & Damages in structural elements & High \\ \hline Turkey earthquake No. 3134—very high PGA values, long duration & Damages in structural elements & High \\ \hline Sitka earthquake—small PGA values, long duration & Cracks in structural elements & Slight \\ \hline El Centro earthquake—very high PGA values, long duration & Damages in structural elements & High \\ \hline L’Aquila—very high PGA values, short duration & Damages in structural elements & Moderate \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Summary of damages. floor and the foundation is smaller, due to the stiffer bearing wall throughout the height of the building. Based on these observations, it is recommended that such floors are not constructed in areas prone to earthquakes. * The results of the calculations have led to significant conclusions. These findings should be taken into account when constructing new buildings or demolishing old ones. It is essential to avoid several design flaws, such as fragile columns, insufficient steel reinforcement, the improper tying of transverse reinforcement bars, the absence of beams and shear walls (even in tall buildings), improperly sized top floors, and incorrect joints. * The presented analysis results are a supplement to research on the impact of seismic shocks on buildings with irregular structures. The results were presented for a specific building with a mixed irregular structure (column-wall) structure. The results obtained are consistent with the results obtained by other authors [20,24,25]. The limitations of this article result from the analysis being performed for a building of a specific irregularity for selected intense near-field earthquakes. Moreover, the article only refers to five selected seismic events; therefore, statistical studies were not conducted. Future analyses should be extended to include phenomena of lower intensity (far field). In the future, a larger number of seismic events should also be included in order to develop statistical relationships. It is worth noting that despite the significant earthquakes that occurred in Turkey in 2023, causing severe damage to over 130,000 buildings, the ones built by the Turkish Housing Development Administration (TOKI) in the earthquake-prone areas of ten provinces, centered in Kahramanmaras, remained structurally sound.