Experimental Research on One-Sided Bolted Beam-Column Joints Under Monotonic Loading

In previously reported experimental studies on T-head square-neck one-sided bolted （TSOB） beam-to-square hollow section （SHS） column joints， bolt pull-out failure caused by the bulge deformation of the column wall has been identified as a typical failure mode. To prevent SHS wall deformation under the bending moment at the beam ends and to improve the deformation capacity of the joint， this paper proposes assembled H-steel strengthening measures for beam-column joints. Monotonic static load tests were conducted on four joints with H-steel components to explore the influence of the length and plate thickness of the strengthening components on the structural response of the joints. The test results showed that the H-steel components prevented bolt pull-out failure and increased the yield and peak bending moments of the joints by 69.3%-72.6% and 22.5%-39.4%， respectively. It is recommended that TSOB beam-to-SHS column joints use extended H-steel components， the cross-section of which should be designed according to the internal force of the joint.