| The Y-eccentrically braced steel frame with angle connected replaceable link is a new type of structure. The frame include the link-beam and link-braced that are connected by angles. This new system address the drawback that connections perform so poorly in the frame, and the failure link can be replaced after the earthquake. The study of this new system is still in its infancy in foreign, however, it is none in our country.In order to study the energy-dissipation performance of Y-shape eccentrically braced steel frames with the angle connected replaceable link under the cyclic loading. Nonlinear finite element analysis for 15 samples with different connection was performed by ABAQUS. The influence of the diameter of bolts, the effect of the thickness of the angle,the spacing of bolts and the thickness of stiffening rib on the strength, rigid, deformability and energy-dissipation performance of EBF systems has been studied.The result shows that the angle connection configurations have a great influence on structural strength, deformability, structural rigid and energy-dissipation. The angle stiffener have a great influence on structural strength, structural rigid and energy-dissipation. The link’s energy-dissipation performs better when the capacity of the connection is higher. The bolt hole deformation should be controlled within a reasonable range to achieve replaceability. At the end of this thesis, suggestions on design of the angle connected replaceable link based on finite element simulation results are present. |
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