| The oil depot is the important component of the national strategic reserve.The reconstruction project of Lintao oil depot is an important project of nation oil reserve in northwest of China.For the safety of oil depot project,reduc ing the earthquake disaster of reservoir in collapsible loess area,obtaining the disaster mechanism of tank structure in collapsible loess area and the measures to ensure the safety of reservoir,the following aspects are mainly studied in this paper.(1)Establish the finite element analysis model of oil storage tank at 0%,50%,100% lipuid storage rate,analyze the dynamic response law of oil storage tank structure under the action of fortification,frequent and rare ground vibration.Showed that the tank under 0% and 50% rate of reservoir have similar dynamic response,the dynamic response of the tank under 100% rate of reservoir increases sharply.(2)Establishing the structure of the oil tank liquid-solid-soil coupling analysis model,analysis of oil tank structure respectively under near-field pulseearthquake,near-field non-pulse earthquake,far-field earthquake.The results showed that,when considering the interaction of soil,reduced the dynamic response of tanks,near field with pulse earthquake effect the largest dynamic response of storage tanks.(3)The finite element analysis models of the oil storage tank structure under different foundation failure conditions were established to analyze the dynamic response of the structure under El-centro earthquake.The analysis showed that the oil tank with invalid foundation will be damaged when it is subjected to seismic action,when the failure area of the oil tank foundation was 1/4 of the bottom area,the dynamic response of the oil storage tank was the largest and there were seri ous safety risks.Therefore,the failure of loess foundation has different influence on the dynamic response of oil storage tank,so the foundation failure should be timely controlled. |
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