Performance of Q690 high-strength steel T-stub under monotonic and cyclic loading

To investigate the performance of a Q690 T-stub, eleven specimens were tested, and a numerical analysis was performed. The results indicate that the EC3 approach can predict the design plastic resistance of the T-stub. The T-stub exhibits better ductility under monotonic loading. Increasing the bolt diameter and material grade is advantageous for the T-stub. A greater bolt spacing m1 leads to a higher ductility coefficient and energy dissipation. For small flange thicknesses, increasing the flange thickness aids energy dissipation. Further, the effect of the material grade of the bolts becomes more pronounced as the flange thickness increases.

Automated summary

Through testing eleven specimens and performing numerical analysis, the performance of a Q690 T-stub was investigated. The results indicate that the EC3 approach can accurately predict the design plastic resistance of the T-stub. The T-stub shows improved ductility under monotonic loading, and increasing bolt diameter and material grade is beneficial. A larger bolt spacing leads to higher ductility coefficient and energy dissipation. Additionally, increasing flange thickness aids in energy dissipation, and the effect of bolt material grade becomes more significant with increasing flange thickness.