Experiment on the Mechanical Property of a Novel Self-centering Shear Link
A novel self-centering shear link(SC-SL)that has an advantage of good energy dissipation capacity,high ductility,low damage and low residual deformation was developed,which combines the advantages of very short shear link with shear slotted bolted connection(VSSL-SSBC)and self-centering SMA braces,so the seismic performance and seismic resilience capacity of eccentrically braced frame with SC-SL will be further improved.Cyclic tests were carried on three SC-SL specimens with friction slip and one SC-SL specimen with ultimate deformation,so the failure modes,hysteresis curves and skeleton curves can be obtained.The test results show that the very short shear link is in the relative static,and all the components in the SC-SL remain elastic during the slip stage.However,in the non-slip stage,four kinds of development process for very short shear link appear sequentially:slip,yield,flange buckling and web buckling.In the whole loading processes,the SMA in the self-centering SMA brace is always subjected to elongation,thus increasing the bearing capacity,energy dissipation capacity and self-centering capacity for SC-SL.As for the skeleton curve,the SC-SL mainly contains elastic,elastic-plastic and strengthening stage.Finally,the validated finite element method has been used to analyze the energy dissipation mechanism of SC-SL during different loading stages.
万方数据
维普
