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本文指出现行压杆弹塑性失稳理论的不足,论证作者所提弹性核理论可作为压杆及压弯杆弹塑性失稳的一般性准则,并提四点推论。导出了矩形、I及T型截面偏心压杆弹塑性失稳公式。通过与现行理论及实验的比较,从理论和实践两个方面论证作者论点的合理性及可靠性,并对我国现行钢结构设计规范(TJ17—74)有关内容提出修正意见。
This paper points out the deficiency of the current elastoplastic instability theory of the pressure bar, and argues that the elastic nuclei theory proposed by the author can be used as a general guideline for the elastoplastic failure of the pressure bar and the bending bar, and provides four inferences. The elasto-plastic instability equations for eccentric, compressive I and T-shaped cross-sections are derived. Through comparison with current theories and experiments, the rationality and reliability of the author’s arguments are demonstrated both theoretically and practically, and amendments are proposed for the relevant contents of China’s current steel structural design specification (TJ17-74).