Seismic Performance of Self-centering Steel Frames with SMA-viscoelastic Hybrid Braces. Issue 10 (27th July 2022)

• Record Type: Journal Article
• Authors: Fang, Cheng; Ping, Yiwei; Chen, Yiyi; Yam, M. C. H.; Chen, Junbai; Wang, Wei
• Is Part Of: Journal of earthquake engineering. Volume 26:Issue 10(2022)
• Page Start: 5004
• Page End: 5031
• Publication Date: 2022-07-27
• Subjects: Self-centering -- shape memory alloy (SMA) -- viscoelastic -- seismic resilience -- steel braced frame -- hybrid control; Earthquake engineering -- Periodicals; 624.1762
• DOI: 10.1080/13632469.2020.1856233
• Languages: English
• ISSNs: 1363-2469

Abstract

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.