Dynamic and Static Analysis of LNG Tank Dome Mesh Shell Structure

DOI

10.2991/978-94-6463-516-4_39How to use a DOI?

Keywords

LNG storage tank; ribbed annular spherical mesh shell; static analysis; initial geometric defects; dynamic analysis

Abstract

The rib-and-ring single-layer spherical mesh shell structure is widely used in the mesh shell structure of LNG tank domes because of its simple installation, convenient construction and excellent mechanical properties. In order to study the mechanical properties of the mesh-shell structure of the tank, the overall model of the 30,000 m3 LNG full-capacity tank was established by using ANSYS software, and static analyses were carried out based on three different combinations of working conditions, and the structural strength and stiffness met the requirements of the specification. Subsequently, the eigenvalue buckling analysis of the mesh shell structure and the effect of initial geometric defects on the stability of the mesh shell structure are analyzed in depth, and finally, the effects of different seismic waves on the structure under one-dimensional seismic action are investigated, and the results show that: when the magnitude of the initial geometric defects increases, the ultimate load carrying capacity of the mesh shell decreases significantly, and when the magnitude of the initial geometric defects is less than 1/700, there is no significant difference in the ultimate load carrying capacity with the perfect structure. It is suggested to take the initial geometric defect amplitude lower than 1/700 of the structural amplitude of the mesh shell. In one-dimensional seismic analysis, the effects of different seismic waves on the structural displacements and peak axial forces of the rods are large, so it is necessary to combine a variety of seismic waves, and the strength of the local mesh shell rods needs to be improved.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Jiedong Zhan
AU  - Chenguang Liang
AU  - Jichong Zhao
PY  - 2024
DA  - 2024/09/17
TI  - Dynamic and Static Analysis of LNG Tank Dome Mesh Shell Structure
BT  - Proceedings of the 2024 5th International Conference on Urban Construction and Management Engineering (ICUCME 2024)
PB  - Atlantis Press
SP  - 366
EP  - 383
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-516-4_39
DO  - 10.2991/978-94-6463-516-4_39
ID  - Zhan2024
ER  -