Research on torsional stiffness of fastener joints in GFRP supporting structure

doi:10.19936/j.cnki.2096-8000.20210427.001

Abstract

Abstract: The torsional stiffness of GFRP support structure joints is an important parameter to study the stability of GFRP support structure, but it has not been studied. In this paper, the torsional stiffness of fastener joints of GFRP support structure under different tightening torques is studied through experiments, and the bending moment-rotation angle curve is established to obtain the torsional stiffness of joints under different tightening torques. Then the finite element model is established to analyze how the tightening torque affects the torsional stiffness of the fastener joint. Finally, the influence mechanism of different tightening torques on the rotational stiffness of the joint is obtained. The research shows that the GFRP tube fastener connection node is a semi-rigid node. With the increase of the tightening torque of the node, the rotational stiffness of the node increases with the increase of the tightening torque. The torsional stiffness of GFRP fastener joints obtained in this paper can provide a theoretical basis for the research and calculation of the overall stability bearing capacity of GFRP fastener support structure.

Key words: GFRP supporting structure, rotational stiffness, bending moment-angle curve, finite element analysis, experimental research, composites

CLC Number:

TB332

QIAN Qing-feng, DENG An-zhong, LI Fei, LUO Sheng, GAO Xun-peng, SHI Lin. Research on torsional stiffness of fastener joints in GFRP supporting structure[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(7): 11-16.

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