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| Study on isolation simplification model and isolation response of LNG storage tank considering thermal insulation layer |
| LUO Dongyu1, SUN Jiangang2, LIU Chunguang1, CUI Lifu2, WANG Zhen2 |
1.School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China;
2.College of Civil Engineering, Dalian Minzu University, Dalian 116605, China |
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Abstract To study the isolation response of LNG storage tank and the influence of insulation layer on base isolation effect, the base isolation simplified mechanical models of 16×104m3full-capacity LNG storage tank considering insulation were proposed, and the seismic responses of the tank were calculated by simplified mechanical model and finite element analysis platform ADINA.Compared the base shear, bending moment and sloshing wave height of the two methods, the following conclusions were obtained: The base shear and bending moment calculated by the simplified mechanical models are larger than those of by numerical simulation, but the sloshing wave height is smaller; the difference rate of the isolated model is smaller than that of the seismic model, In the seismic and isolation design of LNG storage tank, the simplified mechanical model could be used to calculate the base shear and bending moment, which can ensure the fortification requirements.However, it is suggested that the sloshing wave height calculated by the seismic and isolation model should be expanded by 1-1.5 times and 2-2.5 times, respectively.In addition, insulation has an influence on the base isolation effect of LNG storage tanks, it is necessary to consider the effect of insulation on the base isolation design of LNG storage tank.
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Received: 28 June 2019
Published: 28 November 2020
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