Hysteretic performance of the all-steel buckling-restrained brace with LY315 steel core

Xuan Wei, Lu Yang, Yohchia Frank Chen, Meng Wang

Research output: Contribution to journalArticlepeer-review


To study the seismic performance of the all-steel buckling-restrained brace (BRB) using the novel soft steel LY315 for core member, a total of three identical BRBs were designed and a series of experimental and numerical studies were conducted. First, monotonic and cyclic loading tests were carried out to obtain the mechanical properties of LY315 steel. In addition, the parameters of the Chaboche model were calibrated based on the test results and then verified using ABAQUS. Second, three BRB specimens were tested under cyclic loads to investigate the seismic performance. The failure modes of all the specimens were identified and discussed. The test results indicate that the BRBs exhibit excellent energy dissipation capacity, good ductility, and excellent low-cycle fatigue performance. Then, a finite element (FE) model was established and verified with the test results. Furthermore, a parametric study was performed to further investigate the effects of gap size, restraining ratio, slenderness ratio of the yielding segment, and material properties of the core member on the load capacity and energy dissipation capacity of BRBs.

Original languageEnglish (US)
Pages (from-to)899-912
Number of pages14
JournalStructural Engineering and Mechanics
Issue number6
StatePublished - Sep 25 2022

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Hysteretic performance of the all-steel buckling-restrained brace with LY315 steel core'. Together they form a unique fingerprint.

Cite this