球罐地震反应分析及其子结构拟动力试验方法

为了研究流固耦合作用对球罐地震反应的影响,利用ABAQUS软件建立1 000m3球罐有限元模型。采用子空间法对球罐进行了模态分析,并与规范算法进行对比,同时采用耦合拉格朗日欧拉算法,对考虑液固耦合作用的球罐进行地震反应分析。分析结果表明:考虑液固耦合作用使球形储罐的顶点位移、竖向支反力、支柱底部剪力以及拉杆应力等方面衰减得更快,并且在数值上也比附加质量法所模拟的结果小很多。在此基础上,介绍了子结构拟动力试验方法,提出将子结构拟动力试验方法应用于球形储罐的抗震性能分析,阐述了球形储罐子结构拟动力试验的步骤,为球形储罐抗震研究提供一种新的试验研究思路。

Seismic response analysis and the sub-structure pseudo-dynamic test of spherical tank

In order to investigate the effect of fluid-structure coupling on the seismic response of the spherical tank, the finite element model of 1 000 m³ spherical tank is established by ABAQUS software. The modal analysis of spherical tank is carried out by using the subspace method, and compared with the canonical algorithm. At the same time, the coupled Lagrange Euler algorithm is used to analyze the seismic response of the spherical tank considering fluid-structure coupling. The results show that the attenuation of the top displacement, the base shear force, the vertical force, and bar stress are more rapid and the numerical results are much smaller than those of the additional mass method. On this basis, the sub-structure pseudo-dynamic test method is introduced, and the sub-structure pseudo-dynamic test method is proposed to analyze the seismic performance of spherical tank. The sub-structure pseudo-dynamic test method of spherical tank structure is presented, which provides a new experimental method for the study of spherical tank.