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A platform for research: civil engineering, architecture and urbanism
Seismic design of widening flange connection with fuses based on energy dissipation
Abstract Innovative steel moment-resisting connections with replaceable ductile and dissipative low-yield-point (LYP) steel cover plates provide structural resilience after strong seismic events via their behavior as multifunctional structural fuses. To maximize the structural fuse effect without excessively weakening the bearing capacity, this connection is improved by widening beam flange plates close to the beam-to-column joint. In this study, the influences of key factors on the seismic performance, the damage control mechanism, and the behavior of fuses are evaluated and quantified via extensive numerical investigations. A seismic design procedure based on energy dissipation performance is summarized, and a corresponding design example is presented. Analytical results demonstrate that a larger degree of weakening can effectively extend the active coverage of structural fuses. With the increase of the degree of widening of the beam flange, a desirable fuse effect can be realized with a smaller required degree of weakening. However, once the degree of widening of the beam flange plates is sufficiently large, further widening the beam flange has only a minor influence on enhancing the fuse effect of the LYP steel cover plates. The increase of the plastic resistance moment of the cross-section of the beam or the splicing position results in the requirement of a larger degree of weakening of the connection to achieve an equivalent fuse effect. Consequently, to ensure the acceptable bearing capacity of the connection, a larger beam height requires a relatively smaller splicing position or a larger degree of widening of the beam flange plates, and vice versa.
Highlights The steel widening flange plate connection with structural fuses was developed. The influence of key factors on structural fuse effect was quantified. The design procedure of this connection based on energy dissipation was suggested.
Seismic design of widening flange connection with fuses based on energy dissipation
Abstract Innovative steel moment-resisting connections with replaceable ductile and dissipative low-yield-point (LYP) steel cover plates provide structural resilience after strong seismic events via their behavior as multifunctional structural fuses. To maximize the structural fuse effect without excessively weakening the bearing capacity, this connection is improved by widening beam flange plates close to the beam-to-column joint. In this study, the influences of key factors on the seismic performance, the damage control mechanism, and the behavior of fuses are evaluated and quantified via extensive numerical investigations. A seismic design procedure based on energy dissipation performance is summarized, and a corresponding design example is presented. Analytical results demonstrate that a larger degree of weakening can effectively extend the active coverage of structural fuses. With the increase of the degree of widening of the beam flange, a desirable fuse effect can be realized with a smaller required degree of weakening. However, once the degree of widening of the beam flange plates is sufficiently large, further widening the beam flange has only a minor influence on enhancing the fuse effect of the LYP steel cover plates. The increase of the plastic resistance moment of the cross-section of the beam or the splicing position results in the requirement of a larger degree of weakening of the connection to achieve an equivalent fuse effect. Consequently, to ensure the acceptable bearing capacity of the connection, a larger beam height requires a relatively smaller splicing position or a larger degree of widening of the beam flange plates, and vice versa.
Highlights The steel widening flange plate connection with structural fuses was developed. The influence of key factors on structural fuse effect was quantified. The design procedure of this connection based on energy dissipation was suggested.
Seismic design of widening flange connection with fuses based on energy dissipation
Wang, Meng (author) / Ke, Xiaogang (author)
2020-04-03
Article (Journal)
Electronic Resource
English
Resilient Design of Buildings with Hysteretic Energy Dissipation Devices as Seismic Fuses
| Springer Verlag | 2019
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Numerical modeling of welded wide flange fuses
| Elsevier | 2021