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Three large bolted end-plate steel moment-resisting connection were experimentally studied. These connections were single-sided beam-column assemblies that representative of exterior beam-column connections. ST1, ST2, and ST3, the designate names for the test specimens, were composed of H300x94 kg/m Grade SS400/SM400 columns and H300x56.8 kg/m, H400x66 kg/m, H500x79.5 kg/m as beams, respectively, with the same column grade. The specimens were built according to Thailand-steel practice with fully welding beam sections to the end-plates. Then, the end-plates were bolted to the column flanges eventually. The hysteretic behavior, plastic rotations, and failure modes are the studied reports. The findings illustrated that the smaller beam size specimen (ST1) shows less energy dissipation compared to the increased beam sizes specimens (ST2 and ST3). Increased beam sections demonstrate better hysteretic and failure behaviors. Fracture of weld between beam and end-plate observed for all specimens can be concluded that the fillet weld with current practice is inadequate to deliver the plastic moment capacity of beams. End-plated connections with Thailand-steel practice show an insufficient ductility for strong wind or seismic applications. |
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