Seismic response on T-head square-neck one-side bolted endplate connection of beam to square tubular column

•A novel T-head square-neck one-side bolted connection (TSOBC) was proposed.•Test on TSOBC of H-beam to hollow section column under cyclic load was conducted.•TSOBCs have no less than 85% of the bending moment capacity of traditional one.•TSOBC is superior to the traditional one in ductility and ene...

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