（华诚博远工程技术集团有限公司， 北京 100052）

［摘要］全面梳理了轴压杆弯曲屈曲的理论分析过程和工程应用方法。欧拉公式解决了轴压杆弹性区的弯曲屈曲问题。欧拉之后的学者完善了非弹性区的问题，建立了以切线模量理论为基础的轴压杆非弹性区弯曲屈曲的欧拉公式。其后的学者通过考虑安全度的方式将其用于工程设计。新版《钢结构设计标准》（GB 50017—2017）沿用我国自88钢规以来的做法，以等效初挠度综合考虑初始缺陷，按压弯杆计算给出轴压杆弯曲屈曲的设计公式。

［关键词］欧拉公式； 轴压杆； 弹性屈曲； 非弹性屈曲； 弯曲屈曲

中图分类号：TU391文献标识码：A文章编号：1002-848X(2019)19-0126-10

Flexural buckling of axially compressed bars

Wang Lijun

(Huachengbouyuan Engineering Technology Group, Beijing 100052, China)

Abstract:The theoretical analysis process and engineering application methods of flexural buckling of axially compressed bars were summarized. The Euler formula solved the flexural buckling problem of the elastic zone of an axially compressed bar. Scholars after Euler have perfected the problem of inelastic zone and established Euler formula for flexural buckling of axially compressed bars in inelastic zone based on tangent modulus theory. Subsequently, scholars used it in engineering design by considering the degree of safety. The new edition of Standard for Design of Steel Structures (GB 50017—2017) followed the practice of China since 1988-version steel design code to provide the design formula of flexural buckling of axially compressed rods calculated as compressed flexural rods, taking into account the initial defects with equivalent initial deflection.

Keywords:Euler formula; axially compressed bar; elastic buckling; non-elastic buckling; flexural buckling

作者简介：王立军，博士，全国工程勘察设计大师，教授级高级工程师，Email：13901212966@sina.cn。