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为进行三向地震激励作用下非隔震与隔震浮顶储罐动力屈曲特性对比分析,验证基础隔震提高储罐抗震安全度的有效性.以150 000 m3大型立式浮顶储罐为研究对象,应用ADINA有限元分析软件建立数值仿真分析模型,采用加速度激励加载方式,应用Newmark数值积分方法进行动力响应分析,根据B-R动力屈曲准则确定相应的临界屈曲加速度峰值.结果表明:非隔震与隔震情况下罐壁发生屈曲均为弹性屈曲,采用基础隔震可以有效提高储罐的动力屈曲临界荷载及塑性屈服荷载,提高幅度分别为69%和60%;对于罐壁的许用临界应力,我国规范安全等级高于美国和日本的规范要求.
In order to compare the dynamic buckling characteristics of non-isolated and isolated floating roof storage tanks under three-direction seismic excitation, it is verified that the base isolation improves the seismic safety of the storage tanks.With 150 000 m3 large vertical floating roof tanks The object of study is to establish the numerical simulation analysis model with ADINA finite element analysis software, and use the acceleration excitation loading method to analyze the dynamic response with Newmark numerical integral method, and to determine the corresponding critical buckling acceleration peak according to the dynamic buckling criterion of BR.The results show that: And the buckling of the tank wall under earthquake isolation are both elastic buckling. Base isolation can effectively increase the dynamic buckling critical load and plastic yield load of the storage tank by 69% and 60%, respectively; for the critical wall of the tank Stress, our standard security level is higher than the United States and Japan’s regulatory requirements.