《长沙理工大学学报(自然科学版)》
角钢塔典型节点受力性能有限元分析
作者:
作者单位:

(1.长沙理工大学 土木工程学院,湖南 长沙 41011;2.中国电建集团福建省电力勘测设计院有限公司,福建 福州 35000)

作者简介:

陈伏彬(1981-),男,教授,主要从事工程结构抗风方面的研究。

通讯作者:

陈伏彬(1981-),男,教授,主要从事工程结构抗风方面的研究。

中图分类号:

TU391

基金项目:

陕西省教育厅重点实验室科研计划项目(17JS064)


Mechanical performance of typical joints of angle steel tower based on finite element analysis
Author:
Affiliation:

(1.School of Civil Engineering,Changsha University of Science & Technology,Changsha 410114,China; 2.Power China Fujian Electric Power Engineering Co.,Ltd.,Fuzhou 350000,China)

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    摘要:

    【目的】研究角钢塔主斜材典型节点的受力特征。【方法】对角钢塔典型节点在有无辅材角钢及不同辅材角钢厚度、连接板厚度、螺栓间距等参数下的受力性能进行有限元分析,研究当紧固力矩为300N·m 时角钢塔节点在拉剪作用下的应力分布云图、极限承载力和破坏形态,并将典型工况的模拟结果与试验结果进行有效对比,验证有限元方法的有效性。【结果】有限元模拟结果与试验结果吻合良好,模拟得到的极限承载力和破坏形态与试验结果相近。【结论】增加连接板厚度可提高节点的极限承载力;增大辅材角钢厚度对提高节点承载力的作用不大,但有利于增强节点的初始刚度;螺栓间距对节点承载力有显著的影响,过小的螺栓间距易造成应力集中并降低极限承载力,建议最小螺栓间距应不小于3倍螺栓直径。

    Abstract:

    The paper aims to study the mechanical performance of typical joints of main inclined materials of angle steel tower. [Methods]The finite element analysis of mechanical performance of typical joints of angle steel tower under different parameters such as the presence or absence of auxiliary angle steel, thickness of auxiliary angle steel, thickness of connecting plate and bolt spacing was carried out. The stress distribution nephogram, ultimate bearing capacity and failure mode of joints of angle steel tower under ten- sion and shear were studied when the tightening torque was 300N·m, and then the simula- tion results of typical working conditions were effectively compared with the test results to verify the effectiveness of the finite element method.[Findings]The finite element simula- tion results are in good agreement with the test results, and the ultimate bearing capacity and failure mode obtained by simulation are close to test results. [Conclusions]Increasing the thickness of the connecting plate can enhance the ultimate bearing capacity of the joint. Increasing the thickness of auxiliary angle steel has little effect on the bearing capacity of the joint, but it is beneficial to enhance the initial stiffness of the joint. The bolt spacing has a significant impact on the bearing capacity of the joint. Too small bolt spacing is easy to cause stress concentration and reduce the ultimate bearing capacity. It is suggested that the minimum bolt spacing should not be less than 3 bolt diameters.

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  • 在线发布日期: 2022-04-10
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