邓露, 刘文豪, 刘定荣, 何钰龙, 刘艳芝. 自攻螺钉双面剪切连接抗剪性能研究[J]. 工程力学, 2022, 39(9): 81-94. DOI: 10.6052/j.issn.1000-4750.2021.05.0344
引用本文: 邓露, 刘文豪, 刘定荣, 何钰龙, 刘艳芝. 自攻螺钉双面剪切连接抗剪性能研究[J]. 工程力学, 2022, 39(9): 81-94. DOI: 10.6052/j.issn.1000-4750.2021.05.0344
DENG Lu, LIU Wen-hao, LIU Ding-rong, HE Yu-long, LIU Yan-zhi. RESEARCH ON THE SHEAR PERFORMANCE OF SELF-DRILLING SCREW DOUBLE-SIDED SHEAR CONNECTIONS[J]. Engineering Mechanics, 2022, 39(9): 81-94. DOI: 10.6052/j.issn.1000-4750.2021.05.0344
Citation: DENG Lu, LIU Wen-hao, LIU Ding-rong, HE Yu-long, LIU Yan-zhi. RESEARCH ON THE SHEAR PERFORMANCE OF SELF-DRILLING SCREW DOUBLE-SIDED SHEAR CONNECTIONS[J]. Engineering Mechanics, 2022, 39(9): 81-94. DOI: 10.6052/j.issn.1000-4750.2021.05.0344

自攻螺钉双面剪切连接抗剪性能研究

RESEARCH ON THE SHEAR PERFORMANCE OF SELF-DRILLING SCREW DOUBLE-SIDED SHEAR CONNECTIONS

  • 摘要: 该文通过ABAQUS有限元软件对自攻螺钉双面剪切连接抗剪性能进行了研究,通过已有试验结果验证了有限元模型的准确性,基于此模型讨论了钢材强度等级、钢板厚度、螺钉直径以及不同中间钢板厚度对螺钉双面剪切连接的破坏模式和抗剪承载力的影响。结果表明:螺钉双面剪切连接构件的破坏模式可分成3类,分别为:承压破坏、承压-剪切破坏和剪切破坏。螺钉双面剪切连接抗剪承载力随着钢材强度等级和钢板厚度的增加而提高并趋于稳定;随着螺钉直径的增加,螺钉双面剪切连接抗剪承载力呈线性增加;在一定范围增加中间钢板厚度也可显著提高螺钉双面剪切连接抗剪承载力。将数值模拟结果与中美欧规范计算值进行比较分析得出,当钢板发生承压破坏时,中国、欧洲和AISC规范公式计算值偏于保守,AISI规范计算值较接近有限元值;当螺钉发生剪切破坏时,AISI和中欧规范过于保守。AISC规范公式计算值与有限元值吻合较好,因此,当螺钉发生剪切破坏时,使用AISC规范公式计算具有一定参考价值。

     

    Abstract: The shear performance of self-drilling screw double-sided shear connections is studied by numerical simulation using the ABAQUS finite element software. The accuracy of the finite element (FE) model is verified through a comparison with the existing test results. Based on this model, the steel strength, the steel plate thickness, the screw diameter and the middle steel plate thickness are discussed on their influences on the failure modes and shear capacity of the screw double-sided shear connections. The results show that the failure modes can be divided into three categories: namely bearing failure, shear-compression failure and shear failure. With the increase of the steel strength grade and the steel plate thickness, the shear capacity of the screw double-sided shear connections continues to increase and gradually stabilizes. With the increase of the screw diameter, the shear capacity of the screw double-sided shear connections increases linearly. Moreover, the shear capacity of the screw double-sided shear connections can also be significantly increased by increasing the middle steel plate thickness in a certain range. The numerical simulation results are compared with the calculated values of the Chinese, American and European standards. The results show that when the bearing failure of the steel plates occurs, the calculated values of the Chinese, European and AISC standards formulas are conservative, and the calculated values of the AISI standard are closer to the FE values. When the shear failure of the screws occurs, the AISI, Chinese and European standards are too conservative. The calculated values of the AISC standard formula are in good agreement with the FE values. Therefore, the calculation of the AISC standard formula is of reference value when the shear failure of the screws occurs.

     

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