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异质弹性徐变体,如异质混凝土结构,由于其弹性模量和徐变度都与龄期有关,分析应力时必须将时间划分为一系列时段,在每一时段都要建立一个大型刚度矩阵并求出其逆阵,计算量十分庞大。本文提出异质弹性徐变体应力分析的广义子结构法,设结构共有m个区域,分别属于m种不同材料,建议把每一区域作为一个子结构,由于每一子结构本身是一均质体,与子结构有关的矩阵运算只要计算一次,在以后各时段可以重复利用,从而使计算工作得到极大的简化。
Heterogeneous elastic deformation bodies, such as heterogeneous concrete structures, are related to age because of their elastic modulus and degree of creep. When analyzing stress, time must be divided into a series of time periods, and a large stiffness must be established at each time period. The matrix finds its inverse and the amount of calculation is very large. In this paper, the generalized substructure method for stress analysis of heterogeneous elastic creeps is proposed. It is assumed that there are m regions in the structure, which belong to m different materials. It is suggested that each region be a substructure because each substructure itself is a homogeneous structure. The matrix, the matrix operation related to the substructure, can be reused in each subsequent period as long as it is calculated once, so that the calculation work is greatly simplified.