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贮液结构的象足式破坏是一种典型的震害现象,为了有效地减轻或避免象足式震害,文章采用有限元方法(FEM)和数学插值方法对地震中贮液结构产生象足破坏的位置进行了研究。首先将数值计算结果进行指数公式拟合,确定出快速判断象足破坏位置的方法,然后对象足部位进行合理的结构优化设计以提高贮液结构抗震性能。在分析过程中,利用FEM方法对贮液结构地震响应进行数值模拟,考虑了液固耦合效应,同时根据已知结构响应在某一区域收敛于某个极值的条件,采用样条插值方法确定象足产生的位置,提出在有限计算资源情况下,利用样条函数插值分析低精度FEM数值计算结果以获取高精度结构响应的方法,并通过实例验证了该方法的实用性。
The phenomenon of foot-like damage of liquid-storage structure is a typical earthquake damage phenomenon. In order to reduce or avoid foot-like earthquake damage effectively, finite element method (FEM) and mathematical interpolation method are used to simulate the fluid- Destroyed the location of the study. Firstly, the numerical calculation results are fitted by the exponential formula to determine the method of quickly judging the location of the image foot damage, and then the object foot site is optimally designed to improve the seismic performance of the liquid storage structure. In the process of analysis, the FEM method is used to simulate the seismic response of liquid storage structure, considering the liquid-solid coupling effect. At the same time, according to the condition that the known structure response converges to some extreme value in a certain area, the spline interpolation method is used to determine This paper presents a method of spline function interpolation to analyze low-precision FEM numerical results to obtain high-precision structural response with finite computing resources. The practicality of this method is verified by an example.