Seismic Performance of Self-centering Steel Frames with SMA-viscoelastic Hybrid Braces

Cheng Fang, Yiwei Ping, Yiyi Chen, M. C.H. Yam, Junbai Chen, Wei Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

This study presents a novel hybrid self-centering system aiming to overcome critical shortcomings identified in the existing self-centering solution. Two types of hybrid brace incorporating shape memory alloy elements and integrated viscoelastic dampers are first introduced, followed by a system-level analysis on a series of prototype buildings. The results show that using viscoelastic material to reach a moderate damping ratio is highly effective in peak and residual deformation control. Floor acceleration is also effectively controlled by the hybrid solution. A parametric study is then conducted, and design recommendations are given. A probability-based residual deformation prediction model is finally proposed.

Original languageEnglish
JournalJournal of Earthquake Engineering
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • hybrid control
  • seismic resilience
  • Self-centering
  • shape memory alloy (SMA)
  • steel braced frame
  • viscoelastic

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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