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本文就高层建筑结构采用空间协调力学模型进行分析,在建立单榀框架的侧向刚度矩阵时,推荐采用子结构的直接 LDL~T 分解法,可直接得到单榀框架的侧向刚度矩阵,并介绍了该法的 FORTRAN 的算法子程序,避免了先求柔度矩阵,然后求逆得到侧向刚度矩阵;在动力分析时,建议了宜采用求对称矩阵特征对的算法,这些措施可大大提高高层建筑结构空间协同分析的计算精度和效率。
In this paper, the spatial coordination mechanics model of high-rise building structure is analyzed. When establishing the lateral stiffness matrix of single-frame, it is recommended to adopt the direct LDL~T decomposition method of substructure, and the lateral stiffness matrix of single-frame can be obtained directly. The FORTRAN algorithm subroutine of this method is introduced, avoiding the first finding of the flexibility matrix and then obtaining the lateral stiffness matrix by inversion; in the dynamic analysis, it is recommended that an algorithm for finding the characteristic pair of symmetrical matrix should be adopted. These measures can be greatly improved. Computational Accuracy and Efficiency of Spatial Collaborative Analysis of Tall Building Structures .