Seismic characteristics of isolated plate-shell integrated concrete LSS

Abstract

Plate-shell integrated concrete liquid-storage structure (PSICLSS) has been widely applied with the development of water treatment technology. However, there are few anti-seismic performance and base-isolation design researches on it. The seismic performance of PSICLSS was studied, and the accuracy of finite element analysis was verified by experimental study. A calculation method of damping coefficient is proposed and used in a PSICLSS study. Based on 5 natural accelerations and 2 artificial accelerations, the dynamic responses of the isolation liquid storage structure under different peak ground acceleration are analyzed. The analysis results show that, non-isolated PSICLSS is easy to damage when subject to earthquake. The principal stress of the structure is maximum at the upper beam, and the maximum liquid hydrodynamic pressure appears at the connection position of the upper and lower conical shell. When the base isolation measure is used, the stress of the structure can be effectively reduced, but the liquid sloshing response will be magnified. With the increase of peak ground acceleration, the structural dynamic response and liquid sloshing response will increase.

Keywords:

• Liquid storage structure
• fluid-solid interaction
• base-isolation
• damping coefficient
• urban engineering system

Disclosure statement

The authors declare that there is no conflict of interests regarding the publication of this paper.

Data availability statement

Design drawings, model parameters, initial earthquake acceleration, model calculation results that support the findings of this study are available from the corresponding author upon reasonable request.

Additional information

Funding

This paper is a part of the National Natural Science Foundation of China (Grant number: 51968045).