Study on hysteretic energy consumption of controllable-angle fiction hinge joint
A controllable-angle fiction hinge joint was proposed,and the construction of the joint was introduced.The material parameters of the finite element software ABAQUS model was verified by using existing experiments,and the results indicate that the experimental results are in good agreement with the numerical simulation results.Twenty-five joint models with different parameters were established to explore the influence of the 7 change parameters on the hysteretic energy consumption of joints.The parameters are bolt preload,friction coefficient between plates,the distance between the fixed end of the beam and the axis of the pin shaft,the thickness of beam connection end rib plate,the rib extension length of beam connection end,the thickness of rib plate at joint and the extended length of the rib at the joint.By fitting the obtained data,the relationship curves between the improvement coefficient of friction reaction and friction coefficient,as well as the safety reserve coefficient and friction coefficient of joints were established.The results show that the generated limit contact greatly increases the joint reaction force and achieves the purpose of limiting the joint rotation angle when the joint rotation angle is larger than the set rotation angle.The energy consumption is the largest when the friction coefficient is around 0.35.The ratio of the sliding friction reaction force to the bolt preload is approximately equal to the friction coefficient when the joint rotation angle is less than the set rotation angle.The total energy dissipation of the final failure of the joint increases with the increase of the bolt preload.The cumulative energy consumption of the joint is not significantly improved when the bolt preload exceeds the design value.The energy consumption is the best when the distance between the fixed end of the beam and the axis of the pin shaft is 0.95 to 2 times the height of the beam.The ultimate reaction force of the joint will be reduced when the distance between the fixed end of the beam and the axis of the pin shaft is too large.The thickness of beam connection end rib plate,the rib extension length of beam connection end,the thickness of rib plate at joint and the extended length of the rib at the joint have no significant effect on joint hysteresis performance.
steel structure jointcontrollable-anglehysteretic energy consumptionfiction hinge joint
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