| The Y-eccentrically braced steel frames with end-plate connected replaceable shear links is a new type of structure. The shear links of Y-eccentrically braced steel frames is by welding. The welded joints perform so poorly during the earthquake. And the failed links can be replaced easily after a strong earthquake. The study of seismic performance of this structure has significant value.Firstly this paper summarizes and analyzes relevant research results at home and abroad. And by comparing the test results to prove that the finite element program is suitable for the research.Following our current codes, design a Y-eccentrically braced steel frame with end-plate connected replaceable shear links as the BASE specimen. By comparing the performance of end-plate connected link with welded link using the finite element program, then analyzes a total of 15 specimens with different end-plate connected links. The major factors include the diameter of bolts, the number and arrangement of bolts, the thickness of end-plate of the links, the thickness of beam flange, the material of the end-plate. The performance of the strength, rigid, ductility and energy-dissipation capacity has been studied.The results show that the behavior of the Y-eccentrically braced steel frames with end-plate connected replaceable shear links is less affected by the connection. Only if the connection are so weak that joints fail earlier than the link, has a considerable effect on the behavior of the frame. The connection has significant effect on the replaceability of the link. At the end of this paper, suggestions on design of the replaceable link based on finite element simulation results are present. |
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