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Earthquake Engineering and Engineering Vibration

, Volume 19, Issue 1, pp 239–256 | Cite as

Study of a new-type of steel buckling-restrained brace

  • Tao Jiang
  • Junwu DaiEmail author
  • Yongqiang Yang
  • Yongbin Liu
  • Wen Bai
Article
  • 1 Downloads

Abstract

The rectangle core plate of all-steel buckling-restrained braces (BRBs) usually exhibit obvious local buckling, due to the lack of longitudinal restraint from the encasing tube. To eliminate the undesirable effects, a novel steel BRB is proposed. In this new-type steel BRB, two T-shaped steels are adopted as the minor restraint elements to restrain the core plate instead of infilled concrete or mortar. Meanwhile, the ingot-iron material with low yielding strength and high elongation is applied to the steel core to study the mechanical properties of steel BRBs. To validate the theoretical requirements for the width-to-thickness ratio of the steel core and the thickness of angle steel, quasi-static tests of eight specimens were conducted. The tests focused on the energy dissipation capacity and failure modes of the proposed steel BRBs. Nonlinear finite element analysis was also carried out to validate the experimental results. Both the aforementioned results imply that appropriately designed steel BRBs can meet the performance requirements for BRB components.

Keywords

steel BRB T-shaped steel Ingot-iron energy dissipation capacity failure modes nonlinear finite element analysis 

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Notes

Acknowledgement

The authors gratefully acknowledge the financial support provided by the Basic Research Foundation of the Institute of Engineering Mechanics, CEA(2017A01), the Earthquake Scientific Research Funds Program (201508023), and the Program for Innovative Research Team in China Earthquake Administration.

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Copyright information

© Institute of Engineering Mechanics, China Earthquake Administration 2020

Authors and Affiliations

  • Tao Jiang
    • 1
    • 2
  • Junwu Dai
    • 1
    • 2
    Email author
  • Yongqiang Yang
    • 1
    • 2
  • Yongbin Liu
    • 1
    • 2
  • Wen Bai
    • 1
    • 2
  1. 1.Institute of Engineering MechanicsChina Earthquake AdministrationHarbinChina
  2. 2.Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake AdministrationHarbinChina

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