| 马辉*,刘方达,刘喜洋,强佳琪,张国恒.冷弯薄壁高强度合金钢光伏支架构件拉压力学性能试验研究[J].实验力学,2022,37(3):389~398 |
| 冷弯薄壁高强度合金钢光伏支架构件拉压力学性能试验研究 |
| Experimental study on the tensile and compressive mechanical properties of the photovoltaic bracket members with the cold-formed thin wall high strength alloy steel |
| 投稿时间：2021-04-12 修订日期：2021-05-27 |
| DOI：10.7520/1001-4888-21-084 |
| 中文关键词: 光伏支架 冷弯薄壁型钢 高强度合金钢 拉压性能 破坏形态 |
| 英文关键词:photovoltaic bracket cold-formed steel high strength alloy steel tensile and compressive properties failure modes |
| 基金项目:陕西省自然科学基础研究计划项目(2019JM-193)；陕西省住房城乡建设科学技术计划项目(2015-K129) |
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| 中文摘要: |
| 为研究冷弯薄壁高强度合金钢光伏支架构件的拉压力学性能，对光伏支架构件的31个试件进行轴拉和轴压试验研究，观察试件轴向拉压荷载下的破坏过程及破坏特征，获取试件的荷载-位移曲线、承载力及变形等性能指标，分析支架构件的拉压受力破坏机理。结果表明，冷弯薄壁高强度合金钢光伏支架构件在轴拉荷载作用下均发生强度破坏，构件抗拉承载能力较高；而轴压荷载作用下支架构件则发生失稳破坏，构件承载能力较低且变形能力较差。在试验研究基础上，结合现有规范的计算方法，提出了适应于冷弯薄壁高强度合金钢光伏支架构件的拉压承载力计算公式，计算结果与试验结果吻合较好。本文研究结果可为该光伏支架构件的推广应用提供技术参考。 |
| 英文摘要: |
| In order to study the tensile and compressive mechanical properties of the photovoltaic bracket members with the cold-formed high strength steel, 31 test specimens of bracket members are tested under axial tension and axial compression loads in this paper. The destruction process and characteristics of specimens under axial tension and compression loads are observed. The performance indicators of specimens are gotten, such as the load-displacement curves, bearing capacity and deformation. The force mechanism of bracket members under axial tension and compression loads is also studied. The results show that the photovoltaic bracket members with the cold-formed high strength steel are all strength failure under axial tension loads, and the tensile bearing capacity of support members is high. While the support members are all instability failure under axial compression loads, and the bearing capacity of support members is low and the deformation capacity is also poor. On the basis of test researches, combined with the calculation method of existing specification of the formulas for calculating the tensile and compressive bearing capacity of photovoltaic bracket members with cold-formed high-strength steel is proposed. The calculated results are in good agreement with the experimental results, which can provide a technical reference for the popularization and application of the photovoltaic support components. |
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