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一引言在结构的静力或动力分析中,结构计算模式须遵循以下两项原则:(一)所选计算模式能真实反映实际结构的工作状况,(二)计算求解的方程数或者矩阵的阶数最低。如所周知,在结构的静力分析中,经常利用对称或反对称的特点,来简化计算分析。在杆系的动力分析中,也早就利用了这些特点。但是,对于象地震这样的复杂荷载,在分析地震作用下业经离散化后的平面及空间结构,是否仍可利用这些特点,还需要补充些
I. INTRODUCTION In static or dynamic analysis of structures, the structural calculation model must follow the following two principles: (1) The selected calculation model can truly reflect the working conditions of the actual structure, (2) Calculate the number of solved equations or the order of the matrix. The lowest number. As is well known, in structural static analysis, symmetry or anti-symmetrical features are often used to simplify computational analysis. These characteristics have also been utilized for a long time in the dynamic analysis of the rod system. However, for complex loads such as earthquakes, whether or not these features can still be used in the analysis of the discretized plane and space structures under seismic action, it is necessary to add more