# Seismic Response of a Large LNG Storage Tank Based on a Shaking Table Test
## 2 Shaking Table Test of Storage Tank Models
### Analysis of Test Results
#### 2.3.1 Non-Isolated Storage Tanks
In order to study the variation law of the maximum displacement of the non-isolated dome under different loading conditions, the Wolong wave and artificial wave were selected for analysis, as shown in Table 3. Other seismic waves have the same effect on the dome of the non-isolated storage tank. Comparing the test results of the Wolong wave (0.75 g) in the X direction, XZ direction and XYZ direction, it can be seen that under the Wolong wave (0.75 g, XYZ direction), the dome has the largest displacement in X and Y directions, and the displacement response in X direction is more obvious than that in Y direction. The displacements are 6.73 mm and 6.67 mm, respectively, which indicates that the displacement response of the tank model is larger with more excitation directions. Under the excitation of the Wolong wave (0.75 g) in the XZ direction, the maximum displacement of the dome in X is 6.16 mm. The maximum X displacement under Wolong wave (0.75 g, XYZ direction) is 1.09 times the displacement of that under Wolong wave (0.75 g, XZ direction). Under the excitation of the Wolong wave (0.75 g) in the X direction, the maximum displacement of the dome in X is 6.02 mm. The \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Loading Case**} & **Tank Dome Maximum Displacement Response (mm)** \\ \cline{2-3}  & **X** & **Y** \\ \hline Wolong wave (XYZ direction, 0.10 g) & 0.87 & 0.17 \\ Wolong wave (XYZ direction, 0.25 g) & 1.78 & 1.51 \\ Wolong wave (XYZ direction, 0.50 g) & 3.77 & 3.7 \\ Wolong wave (XZ direction, 0.75 g) & 6.16 & 0.17 \\ Wolong wave (X direction, 0.75 g) & 6.02 & 0.15 \\ Wolong wave (XYZ direction, 0.75 g) & 6.73 & 6.67 \\ Artificial wave (XYZ direction, 0.10 g) & 3.80 & 6.23 \\ Artificial wave (XYZ direction, 0.25 g) & 9.29 & 16.56 \\ Artificial wave (XYZ direction, 0.50 g) & 20.63 & 32.22 \\ Artificial wave (XYZ direction, 0.75 g) & 28.85 & 1.18 \\ Artificial wave (XYZ direction, 0.75 g) & 31.04 & 48.07 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Maximum displacement of tank dome under different loading conditions. maximum X displacement under the Wolong wave (0.75 g, XYZ direction) is 1.12 times the displacement of that under the Wolong wave (0.75 g, X direction). Comparing with different peak accelerations under the action of XYZ three-direction Wolong wave, as the peak acceleration increases, the maximum displacement of the dome also increases, reaching the maximum when the peak acceleration is 0.75 g, and the maximum displacement in the X direction is 6.73 mm. Under the excitation of the Wolong wave (0.10 g) in the XYZ direction, the maximum displacements of the dome in X and Y are 0.87 mm and 0.17 mm. The maximum X displacement under the Wolong wave (0.75 g, XYZ direction) is 7.74 times the displacement of that under the Wolong wave (0.10 g, XYZ direction), and the maximum Y displacement under the Wolong wave (0.75 g, XYZ direction) is 39.24 times the displacement of that under the Wolong wave (0.10 g, XYZ direction). In comparison with different peak accelerations under the action of XYZ three-direction artificial wave, it can be seen that under the artificial wave (0.75 g, XYZ direction), the dome has the largest displacement in the X and Y directions, and the displacements are 31.04 mm and 48.07 mm, respectively. Different from the Wolong wave (0.75 g, XYZ direction), the Y direction displacement response of the artificial wave (0.75 g, XYZ direction) is more severe than the X direction. The maximum X displacement under artificial wave (0.75 g, XYZ direction) is 4.61 times the displacement of that under the Wolong wave (0.75 g, X direction). The maximum Y displacement under the artificial wave (0.75 g, XYZ direction) is 7.21 times the displacement of that under the Wolong wave (0.75 g, X direction).