TA664 : Determination Of The Most Damaging Earthquake For Design Of Oil Storage Tanks
Thesis > Central Library of Shahrood University > Civil & Architectural Engineering > MSc > 2022
Authors:
[Author], Amir Bazrafshan Moghaddam[Supervisor]
Abstarct: The construction and continuous operation of oil tank is very important during the entire period of operation, considering the economic and national sensitivities. Lack of accurate design of reservoirs against the force of an earthquake can cause many human and financial losses. Various factors such as the type of soil, the type of tank and the force of the earthquake affect the amount of stress applied to the tank. In this research, the effect of different earthquake parameters on the stresses created in the shell of a restrained mextal tank and finally determining the most destructive earthquakes for the tank in each soil type have been investigated. For this purpose, a cylindrical steel tank with a height of 12.19 meters and a diameter of 30.48 meters, with 90% of its height filled, has been considered under dynamic analysis due to earthquake force in 4 types of soil. The results obtained from the dynamic analysis of the tank in Abaqus software show that, in all types of soil, the main cause of failure of thin-walled steel tanks is shell stress. The reservoir occurred at a height of 6.9 meters and its lower part at a height of 2.5 meters, causing elastic buckling and buckling. The highest average stress caused by the earthquake in the tank shell is at a height of 2.5 meters and in the direction of the earthquake, the stress values created at a height of 2.5 meters in different earthquakes have a direct relationship with the two main parameters of the earthquake, the maximum displacement. (PGD) and the speed spectrum response (Sv) have correlation coefficients. These two parameters have relatively the same effect on tank failure and as the value of these two parameters increases, the stress also increases and finally the tank ruptures. In this research, the soil-structure effects have been ignored. In the end, according to the two destructive parameters, the research records that included 450 recessions in four soil types were ranked baxsed on these two parameters, and in each soil type, 10 earthquakes from all over the world were classified as destructive. The most earthquake has been specified in the design of reservoirs. The three earthquakes Chi-Chi in Taiwan, Kocaeli in Turkey, and Loma Prieta in America have been observed as the most destructive earthquakes in all soil types.
Keywords:
#Keywords: Oil tank #Damage earthquake #Abaqus #Dynamic analysis #Shell Stress. Keeping place: Central Library of Shahrood University
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