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为研究不锈钢箱形轴心受压构件的整体稳定承载力,采用ANSYS软件对不锈钢轴压构件进行了非线性有限元模拟,将模拟结果与试验结果进行对比,验证了所建立有限元模型的准确性.采用经试验验证的有限元模型对具有不同几何初始缺陷、截面残余应力、材料力学性能、截面宽厚比以及长细比的不锈钢工字形构件整体稳定承载力进行参数分析,通过对比确定材料力学性能、构件长细比为影响承载力的主要因素.在参数分析的基础上,依据稳定承载力的数据拟合结果提出了整体稳定系数的三段式计算方法,并将该计算方法与试验数据进行对比,表明此计算方法可较准确地计算不锈钢箱形轴心受压构件整体稳定承载力.
In order to study the overall stability load-carrying capacity of stainless steel box-axis compression members, the nonlinear finite element simulation of stainless steel axial compression members was carried out by ANSYS software. The simulation results and experimental results were compared to verify the accuracy of the established finite element model The parametric analysis of the overall stability of stainless steel H-shaped members with different geometric initial imperfections, residual stress at section, mechanical properties of material, cross-section aspect ratio and slenderness ratio was carried out by the experimentally verified finite element model. The mechanical properties Performance and component slenderness ratio are the main factors affecting the bearing capacity.Based on the parameter analysis, a three-stage calculation method of the overall stability coefficient is proposed based on the data fitting results of the stability bearing capacity, and the calculation method is compared with the experimental data The comparison shows that this method can calculate the overall stable bearing capacity of stainless steel box-shaped compression members.