| 杨明飞,董悦奇,程华瑞,沙志平,陈宜网.随机点蚀圆钢管柱力学性能试验与应用分析[J].安徽建筑大学学报,2022,30(): |
| 随机点蚀圆钢管柱力学性能试验与应用分析 |
| Experimental Study on Mechanical Properties and Application Analysis of Random Pitting Circular Steel Tubular Columns |
| 投稿时间：2021-07-17 修订日期：2021-08-14 |
| DOI： |
| 中文关键词: 随机点蚀 圆钢管柱 力学性能 点蚀损伤强度 敏感区 |
| 英文关键词: random pitting ?circular steel tubular column ?mechanical property ?pitting damage strength ?sensitive area |
| 基金项目:安徽省高校自然基金重点资助项目(KJ2016A209) |
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| 中文摘要: |
| 为了考虑随机点蚀损伤对圆形钢管柱的力学性能影响，对带有随机点蚀损伤的构件进行了轴压试验，试验中考虑了不同的内径和点蚀损伤强度，结果显示，在文中所选点蚀损伤范围内，随着点蚀损伤强度的增加，点蚀损伤构件的屈服载荷和弹性模量均近似呈现线性下降趋势；同时内径越小，点蚀损伤对其屈服荷载和弹性模量影响越大；点蚀损伤强度为4%时，点蚀坑之间环向应变发展明显快于纵向应变发展。接着，利用ANSYS有限元软件分别建立了无损伤构件和损伤构件的数值模型，利用试验结果对数值模型进行校核，最大误差分别为-4.17%和-11.78%，说明文中所建立的数值模型合理。最后，利用该数值模型分析了不同点蚀损伤区域对结构构件力学性能的影响，研究发现当点蚀损伤区位于2L/5~3L/5柱脚处时，构件屈服荷载降低了26.96%，此区域为构件的随机点蚀敏感区。 |
| 英文摘要: |
| In order to consider the influence of random pitting damage on the mechanical properties of circular steel tubular columns, an axial compression experiment was carried out on the components with random pitting damage. In the experiment, different inner diameters and pitting damage strengths were considered. The results show that the yield load and elastic modulus of the damaged components decrease linearly with the increase of the pitting damage strength within the selected damage range. Meanwhile, the smaller the inner diameter, the greater the effect of pitting damage on its yield load and elastic modulus. When the pitting damage intensity is 4%, the development of circumferential strain between pitting pits is obviously faster than that of longitudinal strain. Then, ANSYS finite element software was used to build the numerical models of the non-damaged and damaged components respectively. The numerical models were checked by using the experiment results, and the maximum errors were -4.17% and -11.78%, respectively, indicating that the numerical models established in this paper were reasonable. Finally, the numerical model was used to analyze the influence of different pitting corrosion damage areas on the mechanical properties of structural components. The study found that when the pitting corrosion damage area is located at the 2L/5~3L/5 column foot, the yield load of the component is decreased by 26.96%, and this area can?be?defined?as the random pitting sensitive area of the component. |
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