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本文探讨了一排等间距布置的承受相同轴力的等截面柱,使柱计算长度减少一半所需的横向水平撑杆的设计问题。首先研究了完全理想情况,得出了使柱计算长度减少一半所需的撑杆刚度;接着综合考虑了柱子和撑杆的弯曲,利用有缺陷杆的轴压切线模量概念和分枝屈曲理论,考虑屈曲前变形和内力的影响,得出了为同时考虑撑杆强度和刚度,计算撑杆面积和撑杆设计内力的公式,根据这两个公式,给出了两种撑杆设计方法。计算表明,两种方法是等价的,均可用于设计。
This paper discusses the design of a horizontal horizontal strut designed to reduce the calculated length of a column by equally spaced columns of equal-section columns that withstand the same axial force. Firstly, the fully ideal situation was studied, and the strut stiffness required to reduce the calculated length of the column by half was obtained. Then the bending of the column and the strut was taken into account. The concept of the axial tangential modulus of the defective bar and the branch buckling theory were used. Considering the effect of deformation and internal force before buckling, the formula for calculating the area of the strut and the internal force of the strut design for simultaneous consideration of strut strength and stiffness is derived. Based on these two formulas, two strut design methods are given. Calculations show that both methods are equivalent and can be used for design.