结构多尺度有限元模型分析及应用

针对宏观单元及微观单元的优缺点,研究了多尺度模型计算的特性。基于变形协调条件,利用ANSYS软件建立了不同尺度单元间的耦合约束方程,并采用梁单元,多尺度模型,以及实体单元分别建立一管柱模型,验证了该方法的可行性。最后分别采用梁单元及多尺度单元建立一3层RC框架结构模型,采用静力推覆分析研究了两个模型的整体受力及变形情况,并对底层柱的应力分布进行了研究,发现多尺度模型在界面耦合处应力过度自然,应力分布与梁单元模型吻合较好。为今后结构分析计算提供了一种简单有效的手段。

MULTI SCALEFE MODEL AND ITS APPLICATION IN STRUCTURAL ANALYSIS

The coupling and restraint equations with different dimensions of element are deduced on the basis of the deformation compatibility condition by ANSYS. The validity of the above method is proved by a pipe column model with different dimensions element. Finally,a 3 story RC frame structure was simulated by a beam model and multi scale model contrastively. The dynamic characteristics and response to Pushover of the structure was calculated. The results of the multi scale model were agreed well with the beam model results,and the stress of coupling section in multi scale model got nature excessively. It is indicated that the proposed method can be used in the structure analysis accurately and efficiently.