Based on the academic analysis, a biaxial bending member is equivalent to a single bending member by the rule of equivalent cross section.

在分析大量文献资料的基础上，采用“等效截面”将双向受弯构件转化为单向受弯构件。

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In this paper, the method of equivalent cross-section character is introduced, remaining the coefficient of length unchanged.

本文提出了楔杆的等效截面特性概念，而将计算长度系数保持不变。

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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；

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