Dynamic Response of Sand Cushion Layer Isolation Concrete Liquid Storage Structure with X-Type Soft Steel-SMA Shock Absorber Considering Long (Short) Period Earthquake

To study the seismic response characteristics of sand cushion layer isolation Concrete Liquid Storage Structure (CLSS) with X-type soft steel-SMA (Shape Memory Alloy) shock absorbers under different seismic periods, and to guide the seismic design of such storage structures, in this paper, a time-history analysis of CLSS is conducted, and the dynamic response of plate-shell composite CLSS under seismic actions with different periods is studied, the sloshing characteristics of internal and external liquids is analyzed. To clarify the dynamic response of plate-shell composite CLSS under seismic actions with different periods, the effectiveness of X-type soft steel-SMA shock absorbers and sand cushion layer isolation hybrid control system is discussed. The results reveal that long-period earthquakes are more likely to result in structural damage and liquid leakage compared to short-period earthquakes. Furthermore, the external liquid sloshing of CLSS is found to be more pronounced under seismic actions, with the peak value of external liquid pressure occurring near the top wall positions and the peak value of internal liquid pressure present at the junction of the bottom conical shell and upper conical shell.