Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance of steel beams with replaceable buckling restrained fuses under cyclic loading
Abstract A new type of steel beam system with replaceable buckling restrained fuses was proposed. The replaceable fuse consists of flange connecting plates and web connecting plates as energy dissipation devices, and cover plates to prevent local buckling of the fuses. A total of seven specimens were tested to investigate the influence of cover plates and moment capacity ratio of fuses followed by a detailed finite element analysis to evaluate the performance of specimens at higher drift levels. The tests results showed that the specimens with buckling restrained fuses exhibited stable hysteretic behavior without experiencing strength degradation. Multi-wave buckling instead of first mode buckling was observed in the flanges connecting plates up to 4% drift. The seismic performance before and after the replacement of the damaged fuses was almost identical which indicated the seismic resilient ability of the proposed steel beam system. The strength and failure mode of the steel beam system was mainly controlled by the moment capacity ratio of fuses, and a limiting moment capacity ratio of 0.69 was recommended to remain the beam segments in elastic state with the maximum drift of 6%. Further, an idealized load-displacement relationship was established which can be adopted in the design of the proposed beams.
Highlights New steel beam system with buckling restrained steel fuses was proposed Cover plates infuses prevented local buckling and specimens exhibited stable hysteretic without strength degradation Beam system before and after replacement of fuses exhibited seismic resilience Analytical study ascertained damage concentrated in replaceable fuses for moment capacity ratio ≤ 0.69 at 6% drift An idealized load-displacement relationship considering plastic deformations and slipping of bolts established
Performance of steel beams with replaceable buckling restrained fuses under cyclic loading
Abstract A new type of steel beam system with replaceable buckling restrained fuses was proposed. The replaceable fuse consists of flange connecting plates and web connecting plates as energy dissipation devices, and cover plates to prevent local buckling of the fuses. A total of seven specimens were tested to investigate the influence of cover plates and moment capacity ratio of fuses followed by a detailed finite element analysis to evaluate the performance of specimens at higher drift levels. The tests results showed that the specimens with buckling restrained fuses exhibited stable hysteretic behavior without experiencing strength degradation. Multi-wave buckling instead of first mode buckling was observed in the flanges connecting plates up to 4% drift. The seismic performance before and after the replacement of the damaged fuses was almost identical which indicated the seismic resilient ability of the proposed steel beam system. The strength and failure mode of the steel beam system was mainly controlled by the moment capacity ratio of fuses, and a limiting moment capacity ratio of 0.69 was recommended to remain the beam segments in elastic state with the maximum drift of 6%. Further, an idealized load-displacement relationship was established which can be adopted in the design of the proposed beams.
Highlights New steel beam system with buckling restrained steel fuses was proposed Cover plates infuses prevented local buckling and specimens exhibited stable hysteretic without strength degradation Beam system before and after replacement of fuses exhibited seismic resilience Analytical study ascertained damage concentrated in replaceable fuses for moment capacity ratio ≤ 0.69 at 6% drift An idealized load-displacement relationship considering plastic deformations and slipping of bolts established
Performance of steel beams with replaceable buckling restrained fuses under cyclic loading
Lu, Yingting (Autor:in) / Guo, Zixiong (Autor:in) / Basha, Syed Humayun (Autor:in) / Liu, Yang (Autor:in)
30.04.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch