科研之友
微信
新浪微博
Facebook
分享链接
摘要
To achieve rapid functional recovery after an earthquake, a novel resilient steel beam-to-column joint was proposed based on the damage control principle with fuse plates and C-shaped shear tabs to connect the beam stub and mid-span beam section using high-strength bolts. The beam stub is welded to the column, and the out-of-plane restraint provided by the flanges of the beam sections and C-shaped shear tabs could restrict buckling of the fuse plates, thus improving strength and energy dissipation capacity. Four cyclic loading tests were conducted, the effects of different configurations of the fuse plates and C-shaped shear tabs on the deformation modes, hysteretic curves and skeleton curves were studied. The results demonstrate that this joint effectively shifts the plastic hinge away from the beam end to the fuse plates, while maintaining the main beam and column members in totally elastic state even at the inter-story drift angle of 5% . The joint can recover its original mechanical performance after replacing the damaged fuse plates. The beam flanges could not restrict effectively the out-of-plane deformation of the slotted fuse plates at a inter-story drift angle of 7%, while the unstiffened C-shaped shear tabs underwent excessive residual deformation in their outstanding flanges at an inter-story drift angle of 3%, both significantly impeding rapid repair of the joint. Therefore, the combination of dog-bone-shaped fuse plates and stiffened C-shaped shear tabs is highly recommended. ? 2023 Science Press.
- 单位
