Seismic response of isolated concrete liquid storage structure on elastic foundation
Lei Qi,Tianyu Wang,Bo Sun,Bo Wang,Xuansheng Cheng,Longlong Yang
Abstract
This paper investigates the seismic response of a concrete liquid storage structure for sewage treatment on different site types. By considering fluid-structure-soil interaction, the study examines the dynamic responses of the structure under multi-dimensional seismic action in various sites. The results indicate that the stress of the structure changes with the decrease of the shear wave velocity of the site type. The study shows that the shear wave velocity of the site type has a significant impact on the seismic response of the structure. However, the internal and external liquid sloshing wave height is not affected by the shear wave velocity of the site type. The liquid sloshing velocity increases and then decreases, which leads to a decrease in the hydrodynamic pressure of the internal and external liquid. The study also reveals that the principal stress of the structure increases under multi-dimensional seismic action, while the vertical seismic action has little effect on the sloshing wave height of internal and external liquids. When isolation bearings are adopted, the maximum principal stress of the structure is reduced by 49.3%; in addition, as the shear wave velocity of the site decreases, the seismic isolation efficiency of the isolation layer also decreases.
Key Words
fluid-structure-soil interaction; liquid-storage structure; multi-dimensional seismic excitation; seismic isolation; site soil type
Address
Lei Qi, Tianyu Wang, Bo Sun, Bo Wang, Longlong Yang — Gansu Province Gully Fixing and Tableland Protection Engineering Research Center, Longdong University, Qingyang 745000, China
Xuansheng Cheng — Western China Technical Centre of Seismic Dissipation and Isolation, Lanzhou University of Technology, Lanzhou 730050, China
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