Effect of vertical flange stiffener on ductility of slotted web exclusive connection on (I)-shape profiles through experimental investigation
The separation of flange from beam web at slotted web connection improves many weaknesses of connection. Increasing ductility and elimination of the shear force present in beam flanges are benefits of this connection. In this article, the seismic behavior of this connection on IPE cross-sections is investigated with analytical methods and experimental testing, while considering effective factors in design. Using vertical flange stiffener on this connection is strongly impressive in improvement behavior of this connection. Considering design measures, results show no strength reduction in this part, compared to its non-slotted counterpart, and indicate lower strain gradient in beam flange welds. Performance comparisons on experimental study are made based on the total rotation, maximum resistance and energy dissipation of the specimens. Suitable ductility at this connection show that this connection stands in special moment connection class. More participation of panel zone in earthquake energy absorption reduces the total ductility of this connection and its maximum resistance.
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