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本文根据框筒(筒中筒)结构空间作用原理,提出了等代柱法简化计算方法,给出了直接反映框筒空间作用效能的β曲线及次框架轴力比例系数n值表,并分析了层数变化对空间作用的影响。本文提出的方法简单、实用,可用于结构计算,也可用于在方案选择和初步设计中选取结构参数;使用本法时,可用电算也可用手算。本文最后根据框筒主要特点讨论了结构方案设计中的几个问题,供设计者参考。
In this paper, according to the structural space principle of the frame tube (tube-in-tube), a simplified calculation method of the equal-generation column method is proposed. The β-curve that directly reflects the effectiveness of the space effect of the cylinder tube and the axial force proportional coefficient n-value table of the secondary frame are given and analyzed. The effect of changes in the number of layers on the role of space. The method proposed in this paper is simple and practical. It can be used for structural calculations. It can also be used to select structural parameters in program selection and preliminary design. When using this method, the available calculations can also be calculated by hand. At last, this paper discusses several problems in the design of the structural scheme according to the main features of the framed tube, for the designer’s reference.