A new critical moment formula of tapered beam is proposed, which is similar to the expression for beams with uniform cross-section.
提出了新的变截面梁临界弯矩计算式，其表达形式与等截面梁的公式相同，便于工程应用。
2
Using the conception of equivalent cross-section, the formula of elastic carrying capacity at the larger end of the tapered member is suggested.
采用楔形构件等效截面特性的概念，结合我国规范推导出以大头截面为计算截面的受弯稳定性计算公式；
3
For elements with tapered ends, the equivalent node load equations can be derived based on those of same cross-section elements and tapered elements according to sub-structure method.