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该文采用通用有限元软件ANSYS对奥氏体和双相体两种不锈钢材料的不锈钢工字形截面轴心受压构件的整体稳定性能试验进行了数值模拟。在建立有限元模型的过程中考虑了材料的非线性本构模型、构件的初始几何缺陷、残余应力,并分别对工字形构件绕强轴失稳与绕弱轴失稳形式进行了分析。通过有限元模拟得到的极限承载力、试验测量的极限承载力以及规范计算的极限承载力进行对比可知:该文的有限元方法能够准确模拟不锈钢轴心受压构件的受力情况;同时,对于工字形构件,残余应力对绕弱轴失稳构件的稳定承载力的影响较大;此外,GB50017-2003不适用于不锈钢整体稳定性设计。
In this paper, the general finite element software ANSYS was used to simulate the whole stability of stainless steel I-section compression members of austenitic and duplex stainless steels. In the process of establishing the finite element model, the nonlinear constitutive model, the initial geometric imperfection and the residual stress of the material were considered. The instability of the I-shaped member around the strong axis and the buckling of the weak shaft were analyzed respectively. Comparing the ultimate bearing capacity, the ultimate bearing capacity and the ultimate bearing capacity calculated by the finite element method, the finite element method can accurately simulate the stress of the stainless steel axial compression member. Meanwhile, I-shaped members, residual stress on the stability of weak-axis instability bearing capacity greater; In addition, GB50017-2003 is not suitable for the overall stability of stainless steel design.