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Optimum distribution and design of friction-damped diagonal brace for reducing seismic damage of steel moment-resisting frames.

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Τίτλος: Optimum distribution and design of friction-damped diagonal brace for reducing seismic damage of steel moment-resisting frames.
Συγγραφείς: Saeedi, Amirhossein1 (AUTHOR), Khatibinia, Mohsen1 (AUTHOR) m.khatibinia@birjand.ac.ir, Mohtashami, Ehsan1 (AUTHOR)
Πηγή: Structure & Infrastructure Engineering: Maintenance, Management, Life-Cycle Design & Performance. Oct2026, Vol. 22 Issue 10, p1952-1972. 21p.
Θεματικοί όροι: *Particle swarm optimization, *Damage models, *Steel framing, *Earthquake hazard analysis, *Structural optimization
Περίληψη: Retrofitting buildings using friction-damped diagonal brace (FDDB), as one of the passive control systems, can substantially improve their seismic performance. The distribution of FDDBs along the height of a building is known as a critical decision. This study proposes the optimum distribution and design of FDDBs through a seismic damage-based approach. For this purpose, the seismic damage based on the Park-Ang damage model is chosen that represents seismic deformations and cumulative hysteretic energy dissipated in structural members. The objective function is to minimize the average maximum story damage under seven scaled earthquake excitations. A constraint is imposed to obtain the uniform distribution of story damage while controlling the maximum axial force of brace in FDDBs. A hybrid of the real and binary particle swarm optimization algorithms is developed to solve the optimization problem. Two inelastic steel moment-resisting frames (SMRFs) equipped with a specific number of FDDBs are presented to demonstrate the proposed approach. Results show that the optimized FDDBs-equipped SMRFs sustain the most uniform distribution of damage. In addition, seismic fragility assessment indicates that the optimum FDDBs significantly reduce the probability of failure of the controlled SMRFs at different performance levels. [ABSTRACT FROM AUTHOR]
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  Data: Optimum distribution and design of friction-damped diagonal brace for reducing seismic damage of steel moment-resisting frames.
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  Data: *<searchLink fieldCode="DE" term="%22Particle+swarm+optimization%22">Particle swarm optimization</searchLink><br />*<searchLink fieldCode="DE" term="%22Damage+models%22">Damage models</searchLink><br />*<searchLink fieldCode="DE" term="%22Steel+framing%22">Steel framing</searchLink><br />*<searchLink fieldCode="DE" term="%22Earthquake+hazard+analysis%22">Earthquake hazard analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Structural+optimization%22">Structural optimization</searchLink>
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  Label: Abstract
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  Data: Retrofitting buildings using friction-damped diagonal brace (FDDB), as one of the passive control systems, can substantially improve their seismic performance. The distribution of FDDBs along the height of a building is known as a critical decision. This study proposes the optimum distribution and design of FDDBs through a seismic damage-based approach. For this purpose, the seismic damage based on the Park-Ang damage model is chosen that represents seismic deformations and cumulative hysteretic energy dissipated in structural members. The objective function is to minimize the average maximum story damage under seven scaled earthquake excitations. A constraint is imposed to obtain the uniform distribution of story damage while controlling the maximum axial force of brace in FDDBs. A hybrid of the real and binary particle swarm optimization algorithms is developed to solve the optimization problem. Two inelastic steel moment-resisting frames (SMRFs) equipped with a specific number of FDDBs are presented to demonstrate the proposed approach. Results show that the optimized FDDBs-equipped SMRFs sustain the most uniform distribution of damage. In addition, seismic fragility assessment indicates that the optimum FDDBs significantly reduce the probability of failure of the controlled SMRFs at different performance levels. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/15732479.2025.2552183
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 21
        StartPage: 1952
    Subjects:
      – SubjectFull: Particle swarm optimization
        Type: general
      – SubjectFull: Damage models
        Type: general
      – SubjectFull: Steel framing
        Type: general
      – SubjectFull: Earthquake hazard analysis
        Type: general
      – SubjectFull: Structural optimization
        Type: general
    Titles:
      – TitleFull: Optimum distribution and design of friction-damped diagonal brace for reducing seismic damage of steel moment-resisting frames.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Saeedi, Amirhossein
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          Name:
            NameFull: Khatibinia, Mohsen
      – PersonEntity:
          Name:
            NameFull: Mohtashami, Ehsan
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          Dates:
            – D: 01
              M: 10
              Text: Oct2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 15732479
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              Value: 22
            – Type: issue
              Value: 10
          Titles:
            – TitleFull: Structure & Infrastructure Engineering: Maintenance, Management, Life-Cycle Design & Performance
              Type: main
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