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本文介绍了钢压杆面内失稳弹塑性分析的非线性有限元法。在此基础上,进一步纳入了残余应力的影响,从而可用于求解真实压杆或结构面内失稳的压溃(极限)荷载。一、概述压杆稳定问题的研究,从1752年Euler开始,经历了两个多世纪复杂变化的历史。本世纪60年代以来,国际上已形成用压溃理论代替压屈理论的趋势。对于轴心压杆,ECCS(欧洲钢结构
In this paper, the nonlinear finite element method for the analysis of instability and elasto-plasticity of steel bars is introduced. On this basis, the influence of residual stress is further incorporated, which can be used to solve the crushing (ultimate) load of the actual pressure bar or the instability of the structural plane. First, an overview of the research on the stability of the strut, beginning in 1752 with Euler, has undergone a history of more than two centuries of complex change. Since the 1960s, there has been an international trend of replacing the theory of depression with the theory of crushing. For shaft struts, ECCS (European Steel Structure