Session: SE-05-01 Structural Dynamics

Paper Number: 105976

105976 - Seismic Dynamic Response Analysis of Liquid Storage Tank Under Uneven Foundation Settlement Based on Fluid-Structure Interaction 

Large storage tanks are commonly used to store liquefied petroleum gas, liquefied natural gas, etc. In the actual service process, the storage tank is not only prone to foundation sedimentation under the long-term action of loads such as its own weight and soil expansion force, but also prone to structural damage caused by accidental loads such as earthquakes. This paper establishes a seismic dynamic response analysis method for storage tanks under uneven foundation sedimentation. Through the wet modal analysis of the storage tank, the self-vibration characteristics of the storage tank are obtained. Using a two-way fluid-solid coupling method, the structural response of the liquid storage tank under the action of a single seismic load, sedimentation and seismic load combined is studied, and the influence of uneven foundation sedimentation on the seismic response of the storage tank is clarified.

The results show that when the storage tank with uneven foundation sedimentation is subjected to seismic load, the maximum Mises stress, maximum annular stress, and maximum axial compressive stress of the tank wall increase by 59.73%, 13.58%, and 126.82% respectively compared to the storage tank without sedimentation, and the maximum stress occurs at the location of the axial angle deflection of about -25°, which is where the storage tank's maximum stress occurs under the action of uneven sedimentation. Compared with when the earthquake acted alone, the maximum deformation of the tank wall along the radial direction increased by 29.53%, and the maximum deformation inward increased from less than 0.1mm to 3.8mm, indicating that uneven sedimentation has a great impact on the inward depression of the tank wall. When subjected to seismic action, the upward uplift area of the bottom of the storage tank is more dangerous and more prone to damage than the downward settlement area. The work of this paper can provide a certain theoretical reference for the seismic design of the storage tank and the investigation of seismic damage.

Presenting Author: Jiayi Huang Institute of Chemical Machinery, Zhejiang University

Presenting Author Biography: Jiayi Huang, Master Degree Candidate, Engaged in seismic research of storage tanks.

Authors:

Jiayi Huang Institute of Chemical Machinery, Zhejiang University
Zhiping Chen Institute of Chemical Machinery, Zhejiang University
Peng Jiao Institute of Chemical Machinery, Zhejiang University