Seismic behaviour of self-centring braced frame buildings with reusable hysteretic damping brace

Songye Zhu, Yunfeng Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

124 Citations (Scopus)

Abstract

This paper presents the seismic behaviour of a concentrically braced frame system with self-centring capability, in which a special type of bracing element termed reusable hysteretic damping brace (RHDB) is used. The RHDB is a passive energy dissipation device with its core energy-dissipating component made of superelastic Nitinol wires. Compared with conventional bracing in steel structures, RHDB has a few prominent performance characteristics: damage free under frequent and design basis earthquakes in earthquake prone areas; minimal residual drifts due to the self-centring capability of RHDB frame; and ability to survive several strong earthquakes without the need for repair or replacement. This paper also includes a brief discussion of the RHDB's mechanical configuration and analytical model for RHDB. The seismic performance study of RHDB frame was carried out through a non-linear time history analysis of 3-storey and 6-storey RHDB frame buildings subjected to two suites of 20 earthquake ground motions. The analysis results were compared with buckling-restrained brace (BRB) frames. This study shows that RHDB frame has a potential to outperform BRB frames by eliminating the residual drift problem.
Original languageEnglish
Pages (from-to)1329-1346
Number of pages18
JournalEarthquake Engineering and Structural Dynamics
Volume36
Issue number10
DOIs
Publication statusPublished - 1 Jan 2007
Externally publishedYes

Keywords

  • Damper
  • Energy dissipation
  • Seismic response
  • Self-centring
  • Shape memory alloy
  • Structural control

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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