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在高层建筑施工中,经常需要进行脚手架钢压杆的稳定计算。本文根据欧拉与雅兴斯基公式,推出了由已知条件一次算得断面的简便公式,按其计算的结果与规范计算值接近,并避免了先假定断面再反复计算的过程。现叙述如下: 一、公式推导由于压杆的稳定安全系数K随长细比λ变化,故可写成: K=f(λ) (1) 由《中心受压杆安全系数的选用》(刘大安著)一文中的K=1.67～1.92;当λ≥130时,K=1.92(常数),故K的上限值为1.92。
In the construction of high-rise buildings, the stability calculation of scaffold steel rods is often required. In this paper, according to the Euler and Yahsky formulas, a simple formula for calculating the section from known conditions is presented. The calculated results are close to the norm calculated values, and the process of recalculating the section first is avoided. The description is as follows: I. Formula derivation As the stability safety factor K of the compression rod changes with the slenderness ratio λ, it can be written as: K=f(λ) (1) From “Selection of the safety factor of the central compression rod” (Liu Daan In the article, K=1.67 to 1.92; when λ≥130, K=1.92 (constant), the upper limit of K is 1.92.