Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings

M. Alborzi, H. Tahghighi, A. Azarbakht

Research output: Contribution to journalArticle

2 Downloads (Pure)

Abstract

Buckling-restrained brace (BRB) is a specific kind of bracing system which has an acceptable energy dissipation behavior in a way that would not be buckled in compression forces. However, considerable residual deformations are noticed in strong ground motions as a result of the low post-yield stiffness of the BRBs. The seismic performance of a modern lateral load resisting system, which is called the hybrid BRB, and its conventional counterpart are assessed and compared in this paper. Multiple plates with different stress–strain behavior are used in the core of this new innovative system, and this is its difference with the existent BRBs. Nonlinear static and incremental dynamic analyses are carried out for three building frames with different structural heights, which use conventional and hybrid BRB systems. To carry out response history analyses, the FEMA P695 far-field earthquake record set was adopted in different hazard levels. The hybrid BRBs are shown to have superior seismic performance in comparison with the conventional systems based on the response modification factor and the damage measures including residual displacements and inter-story drift ratios.

Original languageEnglish
Pages (from-to)439-454
Number of pages16
JournalInternational Journal of Advanced Structural Engineering
Volume11
Issue number4
Early online date11 Oct 2019
DOIs
Publication statusPublished - 31 Dec 2019
Externally publishedYes

Fingerprint

Buckling
Steel
Energy dissipation
Earthquakes
Hazards
Stiffness

Keywords

  • hybrid buckling-restrained brace
  • nonlinear analysis
  • performance factor
  • residual displacement
  • seismic assessment

Cite this

Alborzi, M. ; Tahghighi, H. ; Azarbakht, A. / Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings. In: International Journal of Advanced Structural Engineering. 2019 ; Vol. 11, No. 4. pp. 439-454.
@article{5b5dbd480fa141baaab6bf12026d632a,
title = "Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings",
abstract = "Buckling-restrained brace (BRB) is a specific kind of bracing system which has an acceptable energy dissipation behavior in a way that would not be buckled in compression forces. However, considerable residual deformations are noticed in strong ground motions as a result of the low post-yield stiffness of the BRBs. The seismic performance of a modern lateral load resisting system, which is called the hybrid BRB, and its conventional counterpart are assessed and compared in this paper. Multiple plates with different stress–strain behavior are used in the core of this new innovative system, and this is its difference with the existent BRBs. Nonlinear static and incremental dynamic analyses are carried out for three building frames with different structural heights, which use conventional and hybrid BRB systems. To carry out response history analyses, the FEMA P695 far-field earthquake record set was adopted in different hazard levels. The hybrid BRBs are shown to have superior seismic performance in comparison with the conventional systems based on the response modification factor and the damage measures including residual displacements and inter-story drift ratios.",
keywords = "hybrid buckling-restrained brace, nonlinear analysis, performance factor, residual displacement, seismic assessment",
author = "M. Alborzi and H. Tahghighi and A. Azarbakht",
year = "2019",
month = "12",
day = "31",
doi = "10.1007/s40091-019-00244-8",
language = "English",
volume = "11",
pages = "439--454",
number = "4",

}

Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings. / Alborzi, M.; Tahghighi, H.; Azarbakht, A.

In: International Journal of Advanced Structural Engineering, Vol. 11, No. 4, 31.12.2019, p. 439-454.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings

AU - Alborzi, M.

AU - Tahghighi, H.

AU - Azarbakht, A.

PY - 2019/12/31

Y1 - 2019/12/31

N2 - Buckling-restrained brace (BRB) is a specific kind of bracing system which has an acceptable energy dissipation behavior in a way that would not be buckled in compression forces. However, considerable residual deformations are noticed in strong ground motions as a result of the low post-yield stiffness of the BRBs. The seismic performance of a modern lateral load resisting system, which is called the hybrid BRB, and its conventional counterpart are assessed and compared in this paper. Multiple plates with different stress–strain behavior are used in the core of this new innovative system, and this is its difference with the existent BRBs. Nonlinear static and incremental dynamic analyses are carried out for three building frames with different structural heights, which use conventional and hybrid BRB systems. To carry out response history analyses, the FEMA P695 far-field earthquake record set was adopted in different hazard levels. The hybrid BRBs are shown to have superior seismic performance in comparison with the conventional systems based on the response modification factor and the damage measures including residual displacements and inter-story drift ratios.

AB - Buckling-restrained brace (BRB) is a specific kind of bracing system which has an acceptable energy dissipation behavior in a way that would not be buckled in compression forces. However, considerable residual deformations are noticed in strong ground motions as a result of the low post-yield stiffness of the BRBs. The seismic performance of a modern lateral load resisting system, which is called the hybrid BRB, and its conventional counterpart are assessed and compared in this paper. Multiple plates with different stress–strain behavior are used in the core of this new innovative system, and this is its difference with the existent BRBs. Nonlinear static and incremental dynamic analyses are carried out for three building frames with different structural heights, which use conventional and hybrid BRB systems. To carry out response history analyses, the FEMA P695 far-field earthquake record set was adopted in different hazard levels. The hybrid BRBs are shown to have superior seismic performance in comparison with the conventional systems based on the response modification factor and the damage measures including residual displacements and inter-story drift ratios.

KW - hybrid buckling-restrained brace

KW - nonlinear analysis

KW - performance factor

KW - residual displacement

KW - seismic assessment

UR - http://www.scopus.com/inward/record.url?scp=85074594509&partnerID=8YFLogxK

U2 - 10.1007/s40091-019-00244-8

DO - 10.1007/s40091-019-00244-8

M3 - Article

VL - 11

SP - 439

EP - 454

IS - 4

ER -