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

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

  • 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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