| 引用本文: | 杨璐,尚帆,赵梦晗,徐东辰,张勇.不锈钢箱形轴压构件整体稳定承载力计算方法[J].哈尔滨工业大学学报,2017,49(6):124.DOI:10.11918/j.issn.0367-6234.201505047 |
| YANG Lu,SHANG Fan,ZHAO Menghan,XU Dongchen,ZHANG Yong.Calculation method for the overall stability of box-section stainless steel member under axial compression[J].Journal of Harbin Institute of Technology,2017,49(6):124.DOI:10.11918/j.issn.0367-6234.201505047 |
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| 摘要: |
| 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.
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| 关键词: 不锈钢 整体稳定性 参数分析 箱形截面 计算方法 |
| DOI：10.11918/j.issn.0367-6234.201505047 |
| 分类号:TU391 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51108007); 中国博士后科学基金特别资助(2014T70020) |
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| Calculation method for the overall stability of box-section stainless steel member under axial compression |
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YANG Lu1,SHANG Fan1,ZHAO Menghan1,XU Dongchen2,ZHANG Yong2
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(1.The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2.School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)
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| Abstract: |
| To investigate the overall stability of stainless steel axial compression member with welded box-section, the nonlinear finite element simulation of the stainless steel axial compression members was conducted by ANSYS. By comparing the simulation results with the experimental results, the accuracy of the finite element (FE) model was verified. The initial geometric imperfections, section residual stress, mechanical properties, section width-to-thickness ratio and slenderness ratio which affect the overall stability of the member ultimate bearing capacity were parametrically analyzed by the proposed FE model. The results show that the mechanical properties and slenderness ratio of member are key influential factors on the ultimate load. A new three-section formula for calculating the overall stability coefficient has been proposed by data fitting, which can accurately predict the overall stable bearing capacity of stainless steel axial compression members with welded box-section.
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| Key words: stainless steel overall stability parametric analysis box-section calculation method |
