## 3 Results, Analysis, and Discussions
### Dynamic Properties  
Three dam-break tests were conducted on the IBS frame to obtain the dynamic properties of the structure. The vibration data were recorded using three accelerometers. They were analyzed using seismosignal to identify the frequency and period. The results of the dynamic properties of the frame structure were presented in Tables 10-12, respectively. The seismosignal was used for analyzing the recorded data of accelerometers for the test of 1 m, 2 m, and 3 m reservoir water depth. Figure 21 shows the positions of the accelerometers on the frame. Figure 22 presents the time histories recorded during the IBS \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Accelerometers** & **Frequency (Hz)** & **Period (s)** &
\begin{tabular}{c} **Displacement from** \\ **ACs (cm)** \\ \end{tabular} \\ \hline AC1 & 8.11 & 0.12 & 0.14 \\ AC2 & 14.84 & 0.07 & 2.53 \\ AC3 & 12.50 & 0.08 & 1.97 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Dynamic properties of the IBS frame for test 1. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Accelerometers** & **Frequency (Hz)** & **Period (s)** &
\begin{tabular}{c} **Displacement from** \\ **ACs (cm)** \\ \end{tabular} \\ \hline AC1 & 8.11 & 1.46 & 46.97 \\ AC2 & 0.68 & 1.46 & 53.74 \\ AC3 & 0.71 & 1.51 & 54.12 \\ \hline \hline \end{tabular}
\end{table} 
Table 12: Dynamic properties of the IBS frame for test 3. Figure 20: Graph of 3 m reservoir water level test 3 for model 2.  
frame's dam-break test. These histories are based on the highest acceleration generated by the sudden impact of hydrodynamic forces against the structural frame. Figure 21: Illustrating the positions of the accelerometers of the height of the frame. Figure 22: The maximum acceleration from AC3 for: (**a**) test 1 with 1 m water level; (**b**) test 2 with 2 m water level; (**c**) test 3 with 3 m water level. The maximum accelerations, which were recorded using three different accelerometers during the tests, were analyzed using seismosignal to understand the frame structure's behavior. During the third dam-break test of the IBS frame, the accelerometers recorded the highest acceleration due to the high impact of hydrodynamic forces against the structure. Table 13 presents the results of the maximum acceleration for the 2D frame. The purpose of using accelerometers on this IBS frame was to detect and measure any vibration or acceleration motion of the bolt-connected IBS frame structure during the tests. Therefore, Table 14 shows the maximum accelerations for the steel-bolt-connected IBS frame which were recorded by three accelerometers during the dam-break tests. In the first, second, and third tests, the edge of the slab from the side of column 1 experienced the highest acceleration of 0.01446 g, 0.07609 g, and 0.16797 g, respectively, and AC2 and AC1 recorded them. The minimum acceleration for the first, second, and third tests were 0.01279 g, 0.05129 g, and 0.08524 g, respectively, and they were all recorded by AC3. AC3 was located at the mid-point of the slab, an area which is highly likely to resist low acceleration due to the dissipations of the hydrodynamic forces. By the time the frame deflected a bit during test 2 and test 3, the edge of the frame where AC2 was located was more likely to detect a higher vibration than the middle of the slab due to the edges of the frame experiencing high impacts of the hydrodynamic force when the water was passing from the edge of column 1. AC1 recorded the highest acceleration of the frame, since AC1 was placed at the back of column 1. Column 1 experienced the highest vibrations due to the deflection of the frame during test 2 and test 3. Hence, the steel bolt connection showed a durable performance, which made the connections of the IBS frame more ductile and able to withstand the high horizontal impact of the flood.