Assessment of the seismic effect of insulation on extra-large cryogenic liquid natural gas storage tanks |
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| Institution: | 1. Department of Environmental Science and Policy, George Mason University, 4400 University Drive, Fairfax, VA 22030, USA;2. Department of Biological and Agricultural Engineering, North Carolina State University, Box 7625, Raleigh, NC 27695, USA;1. Department of Materials & Applied Chemistry, College of Science & Engineering, Nihon University, 1-8-14, Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-8308, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan;1. Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, PO Box 34110, Doha, Qatar;2. College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, PO Box 34110, Doha, Qatar;1. Grupo de investigación en Materiales, Catálisis y Medio Ambiente, Facultad de Ingeniería, Universidad Nacional de Colombia, Carrera 45 # 26-85, 111321 Bogotá, D.C, Colombia;2. Facultad de Ingeniería, CIFICEN (CONICET-CICPBA-UNCPBA), Av. del Valle 5737, Olavarría, Argentina;3. Grupo del Cemento y Materiales de Construcción (CEMATCO), Materials and Minerals Department, Faculty of Mines, Universidad Nacional de Colombia, Colombia |
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| Abstract: | Insulation is typically used in extra-large double-walled cryogenic storage tanks that are used to store liquid natural gas (LNG). These vessels have been designed with the assumption that the insulation offers negligible structural resistance that might cause structural damage. Observation of the deformation of the insulation in such tanks leads to concern that the insulation may become sufficiently compacted to cause significant load transfer between the inner and outer tank. The inner tank, though protected from most external events by the outer tank, is only designed to contain the liquid gas. It is therefore much more sensitive to seismic effects. In this investigation, simplified and 3D finite element models are used to simulate the interaction effects of the fluid, inner tank, insulation and outer tank. This paper presents an initial analysis of the potential effects of LNG tank insulation under earthquake conditions and assesses the potential for structural damage by comparison of models that do or do not consider the insulation layer. The data reported and statistically sorted include the overturning moment, the base shear, the tank wall stress, and the wave height in the tank. The results show that the insulation layer has certain influence on seismic design of LNG tanks. |
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| Keywords: | Tank Fluid–structure interaction LNG Earthquake Seismic Insulation |
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