Assessment of design parameters influencing seismic collapse performance of buckling-restrained braced frames

Buckling restrained braces are increasingly used as structural fuse elements due to their stable and quasi-symmetric cyclic behaviour and capacity to dissipate a large amount of energy. However, a wider adoption of buckling restrained braced frames is often precluded by the proprietary character of most buckling restrained braces, need for their experimental qualification and sometimes lack of experience of designers. To overcome these problems, a set of typical buckling restrained braces were developed in view of their pre-qualification. Both "conventional" and "dry" devices were considered, with capacities corresponding to typical steel multistorey buildings in Romania. Detailing of buckling restrained braces aimed at investigating the core aspect ratio, gap size, strength of the buckling restraining mechanism, and the unbonding material. The paper presents the results of the experimental program, and recommended design parameters of qualified specimens.

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Drift-based seismic design procedure for Buckling Restrained Braced Frames

Structures ◽

10.1016/j.istruc.2020.12.077 ◽

2021 ◽

Vol 30 ◽

pp. 62-74

Author(s):

Seyed Amin Mousavi ◽

Seyed Mehdi Zahrai ◽

Ali Akhlagh Pasand

Keyword(s):

Seismic Design ◽

Design Procedure ◽

Braced Frames ◽

Buckling Restrained Braced Frames

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Bidirectional loading performance of gusset plates in buckling restrained braced frames

Engineering Structures ◽

10.1016/j.engstruct.2021.112521 ◽

2021 ◽

Vol 242 ◽

pp. 112521

Author(s):

Saul Y. Vazquez-Colunga ◽

Chin-Long Lee ◽

Gregory A. MacRae

Keyword(s):

Braced Frames ◽

Gusset Plates ◽

Buckling Restrained Braced Frames

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Effects of Out-of-Plane Displacements on Load Capacity of Gusset Plates in Buckling Restrained Braced Frames

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.763.892 ◽

2018 ◽

Vol 763 ◽

pp. 892-899 ◽

Cited By ~ 2

Author(s):

Saul Y. Vazquez-Colunga ◽

Chin Long Lee ◽

Gregory A. MacRae

Keyword(s):

Finite Element ◽

Finite Element Methods ◽

Load Capacity ◽

Numerical Results ◽

Numerical Analyses ◽

Braced Frames ◽

Gusset Plates ◽

Out Of Plane ◽

Buckling Restrained Braced Frames ◽

Monotonic Load

This study sets out to investigate the effect of out-of-plane (OOP) displacements on the monotonic load capacity of gusset plates (GPs) via numerical analyses using finite element methods. Two models were used: a) models with in-plane (INP) actions only; and b) models with both INP and OOP actions. The numerical results show that the load capacity of GPs is reduced with the presence of OOP displacements. For an OOP drift of 2.5%, the reduced capacity ranges from 95% to 80% with an average of 88% of the load capacity when only INP actions were applied.

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