NUMERICAL ANALYSIS OF THE SEISMIC PERFORMANCE OF RIGID BEAM-TO-COLUMN MOMENT CONNECTIONS EQUIPPED WITH STEEL SLIT DAMPER (SSD)
In the present research, the finite-element method (FEM) implemented in the ABAQUS software is used to evaluate several numerical models. This study presents a composite system of slit dampers coupled with column-attached seats, where excessive loading of the structural system leads to the yielding of the slit damper rather than damaging main structural elements, especially the beams. In this respect, four aspects of the behavior of such connections are herein investigated to come up with an in-depth insight; these include aspect ratio, distance ratio, compactness ratio, and thickness ratio. Variations of the mentioned ratios are explained and compared by assigning differences that can be applied based on the connection rotation hysteresis curve, displacement envelope curve, dissipated energy, plastic strain, and stress contour. According to the results of these studies, it was figured out that an increase in aspect ratio, a decrease in distance ratio, and/or a change in thickness ratio tend to lower the performance of a slit damper.
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